Classification of Therapeutic Plants by Yin and Yang Energy

Classification of Therapeutic Plants by Yin and Yang Energy

Introduction to Yin/Yang Principles Applied to Plants

The macrobiotic concept extends the ancient Chinese Yin-Yang philosophy to the field of food and plants, aiming to balance the Yin (expansive, cool, descending, acidic) and Yang (contracting, warm, ascending, alkaline) tendencies in the body[1]. Yin and Yang are not absolute labels, but relative qualities – any plant can be more Yin or more Yang in relation to another, depending on its characteristics. The basic principle is that Yin and Yang oppose and complement each other, maintaining balance: the "expansive, wet, cold, dark, ascending, acid" aspects correspond to the Yin energy, and the "contracting, dry, warm, light, descending, alkaline" aspects correspond to the Yang energy[2][1]. In practice, these principles translate into a series of criteria for classifying plants. Below we analyze these criteria – the form and mode of growth, density and water content, color, chemical composition and taste – and how they allow us to characterize the medicinal plants commonly found in Romania / Europe as having predominantly Yin or Yang energy.

Yin/Yang Classification Criteria of Plants

Shape and direction of growth

The shape and way a plant grows indicates its energetic tendency. Plants with compact, round shapes or that grow downwards and inwards (roots, tubers) exhibit Yang qualities (contraction and internalization energy). By contrast, plants with elongated, spreading shapes or that grow upwards and outwards (tall stems, lianas, wide leaves) express more Yin (expansive, expanding energy). For example, carrot root is considered more Yang: it grows downward in the soil, has an elongated but dense and concentrated shape, storing nutrients, and has an orange color (a Yang color range)[3]. In contrast, green shoots and juicy fruits tend to be Yin: fruits and aerial parts grow on the surface of the soil or upwards, expand in light and heat, and are often larger in volume and less dense[3][4]. Thus, in a balanced therapeutic garden we will find both plants with vigorous, deep roots (Yang), and plants with rich, tall or creeping stems and leaves (Yin), to benefit from the entire energy spectrum.

Density, weight and water content

The physical density of the plant (weight, consistency, mobility) is another indicator of energy polarity. Plants or parts of plants that are dense, heavy, consistent (e.g., fibrous or woody roots, seeds, and hard nuts) exhibit Yang traits, associated with contraction and solidity. On the other hand, porous, light or water-rich structures (tender leaves, juicy fruits, delicate flowers) are predominantly Yin, reflecting expansion and immobility. Water is a Yin element – thus, a succulent or sap-rich plant will be more Yin than a dry one. For example, fruits such as watermelon or tomatoes (rich in water) are notoriously Yin, while dried seeds or starchy roots (carrot, parsnips) lean towards Yang[5][3]. A comparative example: carrot (dense root, little water) is more Yang, while cucumber (water-filled fruit, aerated structure) is much more Yin. In the case of medicinal plants, plants rich in mucilage or juices (e.g. marshmallow, aloe) have refreshing and emollient Yin effects, while plants with woody tissues or hard roots (e.g. oak – bark, burdock – root) bring an astringent and consolidating Yang contribution to therapy.

Plant color and the Yin-Yang spectrum

In energy philosophy, colors are associated with different vibrations and are also placed on a Yin-Yang axis. Warm, bright colors – especially those in the red, orange, yellow, brown, white area – are considered Yang colors, having a more "contracting" energy frequency[6]. On the other hand, cool or pale colors – purple, blue, green, black – are Yin colors, with more "expansive" or diffuse energy[6]. Thus, we can also intuit the character of a plant by the predominant shade of its parts used: - A red or orange flower (e.g. marigold flowers – intense orange, or red chili pepper) carries a more accentuated Yang dynamism. Marigolds, for example, having orange flowers, are often classified as a Yang-prone plant[5].- Purple or blue flowers (e.g. lavender – purple flowers, cornflowers, hydrangeas, hyacinths) will be more Yin in energy, these colors being associated with calm and expansion. Lavender, with its scattered, expansive structure, purple flowers, and soothing aroma, is a typical example of Yin energy.- Green leaves are also on the Yin spectrum (green = Yin color)[6], especially when they are tender. That is why many green leafy medicinal plants (mint, basil, nettle) have refreshing, detoxifying or relaxing effects (Yin attributes). On the other hand, plants that turn yellow or brown (e.g. dried tobacco leaves – brown) acquire a more pronounced Yang hue. Pale green leaves – Yang character; dark green leaves – Yin.

Chemical composition: minerals and vitamins

The macrobiotic approach has highlighted the link between the chemical composition of foods/plants and their Yin-Yang energy. In particular, the sodium/potassium ratio in plants is an important indicator. Sodium (Na), a mineral with a contracting and preservative effect, is associated with Yang energy, while potassium (K), which promotes relaxation and elimination of water (diuretic, expansive effect), is associated with Yin energy[7][4]. This idea originated in the research of the Japanese physician Sagen Ishizuka, then processed by George Ohsawa, the founder of modern macrobiotics, who explicitly described the principle: foods rich in potassium are Yin, foods rich in sodium are Yang[7].

By extension, other chemical elements can also be viewed energetically. For example, traditional macrobiotics considers that alkali metals and light elements tend to be Yang (e.g. sodium, magnesium, calcium in alkaline form, hydrogen, carbon), while heavy metals and elements with acidifying or oxidizing effect tend towards Yin (e.g. potassium – in excess it has a relaxing effect, phosphorus, sulfur, oxygen, but also elements such as nitrogen, iron, zinc – essential for growth and biological expansion). In phytotherapeutic practice, these associations are reflected as follows:

- Plants rich in alkaline minerals (sodium, calcium, magnesium) and trace elements with an astringent effect (e.g. tannins rich in precipitated potassium) often have a contracting, hemostatic or fortifying effect, hence Yang. Oak bark (Quercus cortex), for example, rich in astringent tannins (with metal ions that precipitate proteins), stops bleeding and tightens tissues – a pronounced Yang effect.

- Plants rich in potassium and iron (such as nettle – Urtica dioica, which contains a lot of K, Fe, chlorophyll) stimulate diuresis and blood formation, cleansing and cooling the body – a set of Yin-type actions. In fact, nettle is considered "unleashing stagnant energies" (through its detoxifying effect), which corresponds to an expansive-dynamic Yin energy.

- Plant vitamins can also be viewed through the Yin / Yang lens. Water-soluble vitamins (C and B complex, abundantly present in many greens and fruits) act quickly and are not stored – they support immediate, expansive metabolic processes, thus having a Yin quality. On the other hand, fat-soluble vitamins (A, D, E, K – often present in oilseeds or oil extracts) accumulate in the body and have a structural and contracting role (e.g. vitamin K helps coagulation – Yang consolidation process). Thus, it can be said that vitamins B and C are "Yin vitamins", and vitamins A, D, E, K "Yang vitamins", which is in line with their solubility (in aqueous vs. fatty environment).

Note: These chemical correlations, while useful as a guide, are generalizations and are not a substitute for modern phytopharmacological analysis. They illustrate, however, the holistic way in which Eastern thought connected the nature of substance with the energetic effect on the body.

Taste and effect (acid/alkaline, flavors and properties)

The taste of plants is an immediate indicator of their energy, as different tastes produce different reactions in the body – either expansion/relaxation (Yin) or contraction/stimulation (Yang). The macrobiotic tradition (also influenced by the principles of oriental medicine) classifies tastes as follows: sweet, sour and spicy (spiciness) are Yin attributes, while salty, bitter and alkaline ('leacious') are Yang attributes.

· The sweet taste (found in fruits, sweet vegetables, non-fat flowers) relaxes and expands the body and mind – that's why it's considered Yin. Medicinal plants with a predominantly sweet taste (e.g. licorice – Glycyrrhiza glabra, lime – the infusion of linden flowers has sweetness) tend to calm, to bring a relaxing effect (Yin).

· The sour taste (specific to acidic fruits, some plants rich in vitamin C – rosehips, sea buckthorn, lemon) also has a Yin component, because the acid has an initial effect of dilating the taste and permeabilization; however, the sour also has an astringent effect (oils or organic acids can easily contract the tissues preventing losses – e.g. vinegar). On the whole, however, in a macrobiotic context, sour is seen as moderate Yin (expands the senses, awakens appetite).

· The spicy / spicy taste (pungent) is interesting: although it gives us a burning sensation (heat), its energetic effect is one of dispersion – a spicy spice (chili pepper, pepper, ginger) makes the energies circulate, sweat, so it produces expansion and elimination of excess (considered Yin). Thus, very spicy and aromatic spices are placed by macrobiotics among the most powerful Yin substances[8]. Example: hot pepper (Capsicum) – is hot to taste, but used moderately releases stagnation, stimulates sweat and endorphins (expansion); in excess, however, it creates hyper-expansion (energy drain, exhaustion – extreme Yin sign). Likewise, spicy-aromatic peppermint (Mentha piperita) has a cooling and decongestant effect – macrobiotics consider it Yin (in fact, peppermint tea is mentioned as a strong Yin food[8]).

· The salty taste is contracting and preservative – salt "squeezes" and retains water, and at a subtle level it induces concentration and rigidity. That is why salty is categorized as Yang taste. Highly salty plants or products (e.g. seaweed used in phytotherapy or food, rich in sodium) are powerful energizers and 'warmers', but can also create tension (excessive Yang effect). Salt is considered the most Yang compound[9] – not coincidentally, in natural medicine excess sodium is associated with hypertension and "hardening" of tissues.

· Bitter taste is, in the oriental classification, correlated with Yang energy by its effects: pure bitterness (from plants such as wormwood, artichoke, marigold, yarrow) stimulates digestive fire, dries and contracts tissues (reduces moisture, secretions) and is often slightly internal warmer. Thus, bitter plants have traditionally been considered "warming and dry", that is, of a Yang nature. However, bitterness also has Yin aspects in Chinese medicine (where bitterness is said to "lower and drain" excess fire). In the European macrobiotic context, however, bitter plants are used for the tonic effect (Yang) on the organs – e.g. artichoke tones the liver, wormwood stimulates slow digestion.

· Alkaline is not strictly speaking a pure taste, but refers to that leachy / bitter flavor that some plants rich in bases have (e.g. vegetables with potassium carbonate – "lye"). The alkaline taste leaves a 'soapy' / bitter sensation (similar to alkaloids) and is also considered Yang, as it indicates the presence of highly reactive substances, often with an irritating or stimulating effect (examples: the lye in the soap tub was used for cleansing – so it reacts aggressively with fats; in plants, a high content of bases can indicate caustic or tonic-bitter potential). An example of an "alkaline taste" would be that of ash water (the traditional drink called "lattice" in some areas n. ai.) – very Yang through the intense heating and contracting effect of the digestive tract.

Effect on the body (heating vs cooling): Closely related to taste and chemical composition, plants have either a warming (Yang) or cooling (Yin) effect on the body. For example: spicy plants or plants rich in volatile oils (ginger, cloves, thyme) generate metabolic heat – so they are Yang in effect, while plants rich in water, mucilage or with a bitter taste (bitter cucumber, aloe, marshmallow) absorb heat and eliminate it – having a Yin cooling effect. Traditional Chinese medicine often combines taste with thermal nature when classifying plants: a hot and hot medicine is Yang, a sour and cold one is Yin, and so on.[10]. From a macrobiotic perspective, the final effect matters in the evaluation of Yin / Yang: if a plant causes vasodilation, relaxation, elimination (e.g. sweating, diuresis, laxative) – therefore cooling or loss of energy – it is Yin, and if it causes vasoconstriction, stimulation, retention (e.g. stopping bleeding, heating, energizing) it is Yang[11].

Summary of criteria: We can summarize that a typical Yang plant would be smaller, denser, with round or underground parts, reddish-yellow color, salty / bitter taste, warming or astringent effect, possibly rich in sodium and contracting mineral elements. A Yin plant would be voluminous or elongated, juicy, with aerial parts or flowers in cold colors, sweet / sour / spicy taste, refreshing or relaxing effect, rich in potassium, vitamins C and B, expansive substances. Between these extremes there is a scale, energy gradients, with plants often balancing Yin and Yang attributes in different proportions.

Examples of Yin and Yang medicinal plants common in Romania / Europe

Next, we will examine some common therapeutic plants in the flora of Romania / Europe, analyzing their characteristics according to the above criteria. The aim is to illustrate how we can consider a plant "more Yin" or "more Yang" and what this is useful for us in a therapeutic garden. Ideally, a herbal garden should include all relevant categories – Yang energy plants, Yin energy plants, but also moderately balanced plants – to cover a wide range of therapeutic needs (from "Yang" conditions – inflammation, excess heat, tension – remedied with Yin plants, to "Yin" conditions – cold, weakness, humidity – remedied with Yang plants).

Plants with predominantly Yang energy (contractors, heaters)

These plants generally have stimulating, tonic, astringent or warming properties. Many are roots or strong aromatic plants with a bitter / salty taste. In the therapeutic garden, they are useful for revitalization, to "tighten" when the body loses too much (energy, heat, fluids) and to combat states of coldness, slowness or Yin weakness. Some notable examples:

Artichoke (Cynara scolymus) – Artichoke leaves are intensely bitter (Yang taste) and slightly astringent, stimulating the liver and gallbladder. The plant is relatively dense, with heavy dark green leaves (neutral color towards Yin, but the dominant bitterness makes it Yang as an effect). Artichokes dry out and warm the digestive system slowly, fighting excess moisture.
Wormwood (Artemisia absinthium) – A classic bitter aromatic herb, very Yang. Its green-gray leaves (Yin color) are extremely bitter and contain volatile oils; the combination of bitter and aromatic provides warming, digestive stimulant and anti-parasitic effect (all Yang actions). Wormwood is known for "drying" the moods and toning the weakened body. Although the strains are aerial (Yin as position), the chemical and strong action place it firmly in the Yang category.
St. John's wort (Hypericum perforatum) – Plant with bright yellow flowers (Yang color) and bitter-aromatic taste. St. John's wort grows on sunny hills (medium Yang) and accumulates active ingredients in the aerial parts at the summer solstice – the time of maximum solar Yang. Its properties include an antidepressant, slightly warming effect, anti-inflammatory and astringent (dries wounds). The bitter taste and tannin content make it tonic and contracting, therefore Yang, even if it also has nerve-calming effects (which would be Yin – a demonstration that many plants are mixed in action). Overall, the Yang character predominates through energizing and strengthening: St. John's wort "brings the sun" into the depressed or 'wet' body.
Sage (Salvia officinalis) – A woody plant with aromatic gray-green leaves. Sage has a bitter-aromatic and slightly salty taste, indicating Yang energy. In tradition, sage "dries" – it is used to reduce excessive sweating or lactation (contracting effect of secretions). It has warming and antiseptic properties (due to volatile oils), being excellent for gargling in sore throats (where it tightens tissues and removes Yin moisture). The small purplish flowers of the sage add a Yin touch, but the aromatic and bitter compounds (Yang) remain dominant.
Rosemary (Rosmarinus officinalis) – Another aromatic Mediterranean plant with Yang energy. Its leaves are small, narrow, hard (Yang texture) and contain stimulating essential oils. Rosemary is known for its effect of warming peripheral blood circulation and improving memory (stimulates brain activity). The taste is aromatic-bitter (Yang), and the plant prefers sunny and dry climates (Yang conditions). In the garden, rosemary exudes a pervasive fragrance that energizes – a hint of its Yang nature.
Marigolds (Calendula officinalis) – Although they are delicate flowers, many sources attribute Yang energy to them due to their deep orange color and astringent healing properties. Modern studies have even shown that marigold flower extract has a more pronounced overall "Yang" character compared to other Western medicinal plants tested[12]. Marigold flowers have a weak and resinous bitter taste, contain antiseptic substances that speed up the closure of wounds (contract tissues) and slightly stimulate local circulation. These traits – bitterness, astringency, stimulation – confirm the position of the marigold towards Yang, even if as a flower it would have been intuitively Yin.

Note: The above plants, being Yang, are often used to treat Yin conditions (such as excess moisture/fluid, internal cold, weakness). They "bring warmth, tone and structure". In a balanced therapeutic garden, Yang herbs usually occupy the "active pharmacy" area – herbs for stimulation and toning when the body needs a boost.

Plants with predominantly Yin energy (expansive, refreshing)

These plants have refreshing, soothing, depurative or relaxing effects. Many are green plants rich in water and potassium, fragrant flowers or sweet-sour fruits. They help disperse excess heat or tension, relax and eliminate (toxins, retained water) and are useful for tempering Yang-type conditions (fever, inflammation, agitation). Some representative examples:

Mint (Mentha piperita) – Probably the classic example of a Yin medicinal plant. Peppermint leaves are green, rich in refreshing menthol oil; peppermint tea has a very refreshing and relaxing effect, soothes spasms (expands smooth muscles) and cools the airways. The strong aroma, although spicy, produces peripheral vasodilation and perspiration, therefore heat dispersion – Yin character. Macrobiotics considers peppermint and aromatic teas in general to be strong Yin[8]. Even its slightly sweet taste contributes to relaxation. In the garden, mint spreads quickly (expansive tendency) and prefers moist places – consistent with the Yin nature.
Chamomile (Matricaria chamomilla) – A well-known calming plant with delicate white-yellow flowers. Chamomile flowers have a sweet, slightly fruity aroma (in English "hay apple"), indicating Yin gentleness. Chamomile tea is slightly bitter, but predominantly sweet and floral, acting as a mild sedative and gastric anti-inflammatory – that is, it cools and soothes (Yin effects). Although it can stimulate sweating to fever (peripheral Yang action), the main use is to relax the nerves and stomach. Being a flower open to the sun (Yin as an expansive form) and having white petals (Yin color) around a yellow center (Yang minor), chamomile is considered quite balanced, but leaning towards Yin due to its calming and antispasmodic effects.
Linden (Tilia cordata / platyphyllos) – Linden flowers, used in infusions, have a sweet-honeyed fragrance (sweet taste = Yin) and induce a moderate nervous and sweating calming effect. Linden tea is well known for relaxing the central nervous system and promoting sleep, clearly Yin properties. In addition, linden helps to lower fever through sweating (opens pores – expansive, Yin). Again, although sweating is a short-lived yang process, the ultimate goal is to cool the body – hence Yin. The color of linden flowers is pale yellow, bright but gentle, also visually suggesting calm energy. In the garden, the scent of linden creates a quiet, comforting atmosphere – very Yin.
Nettle (Urtica dioica) – Although we would expect the stinging nettle to be Yang (to the touch!), internally nettle acts predominantly Yin. The dark green leaves of nettle are extremely rich in chlorophyll, iron, magnesium and potassium, having strongly depurative properties: they increase diuresis, eliminate urates, alkalize the blood. Through these blood-cleansing effects and eliminating metabolic excess, nettle disperses stagnation (Yin). Also, the consumption of nettle brings a nutritional intake (vegetable proteins, vitamins B, C) that replenishes the body without overheating it – therefore a light Yin tonic (unlike Yang tonics such as ginseng). Its raw taste is green willow (slightly bitter and salty – which Yang would indicate), but traditional nettle soup is increased with vinegar or borscht (introducing Yin) and consumed in the spring to remove the "bad blood" accumulated over the winter. Thus, the role of nettle in phytotherapy is to "open the elimination pathways" and cool gently – Yin actions, even if the plant itself has combined factors.
Plantain (Plantago lanceolata / major) – A medicinal plant with long green leaves (lanceolate form – slightly Yin by elongation) and bitter-sharp taste but also mucilaginous when chewed. Plantain is known as an anti-inflammatory and emollient (crushed leaves soothe itching, coughing, skin irritation). The mucilage in the leaves (hydrophilic components – therefore Yin) explains the emollient, softening effect of the mucous membranes. In addition, it has tannins (slightly astringent Yang) that reduce local edema. Overall, however, plantain cools and heals inflammation, so it is Yin-oriented. In tradition it is said that "where there is a stain (wound), you put plantain", precisely because of its effect of extracting "fire" from the tissues – a figurative language for the anti-inflammatory action of Yin.
Elderberry (Sambucus nigra) – Elderberry flowers and fruits both have medicinal applications with a Yin tinge. Elderflowers (white, sweet-smelling) induce profuse sweating when cold, helping to lower fever – a typical Yin remedy for a Yang (fever) condition. They are also diuretic and slightly laxative (eliminate, so also Yin). Elderberries (black-purple, Yin color) are used as a laxative and for an antiviral effect of "cleansing the body", also having a sweet-sour taste. Both flowers and fruits, by color and effect, fall into the category of Yin refreshing and evacuating plants.
Lavender (Lavandula angustifolia) – Also mentioned earlier, lavender has fragrant purple flowers and is recognized as a nerve sedative and muscle relaxant. The scent of lavender calms anxiety and induces sleep – a clear Yin (calming) effect. Lavender essential oil, although concentrated, is not exciting like others, but rather balancing the nervous system. The purple color of the flowers emphasizes the correspondence with the Yin (spiritual, soothing) energy. In folk medicine, a bag of lavender under your pillow helps with sleep – a simple way to use the plant's Yin vibration to balance an excess Yang (insomnia, stress).
Yarrow (Achillea millefolium) – Interesting to discuss because it combines Yin and Yang attributes. Its white (sometimes pink) flowers indicate Yin, and the leaves are fine, very scattered/fragmented (expansive Yin form). However, the chemical composition includes camphor volatile oil and bitter compounds, and the plant is anti-inflammatory but also hemostatic. The yarrow stops bleeding (contraction Yang effect) and also decreases fever through sweating (cooling Yin effect). The taste is bitter-aromatic. Overall, Achilles is relatively balanced, perhaps slightly Yang by stopping bleeding, but Yin by cooling effect in fever. Because of this duality, yarrow is considered regulating (balancing) – it treats both "too much fire" (inflammation) and "too much water" (hemorrhage), bringing both into balance.

Note: The Yin plants presented above are used to calm and disperse Yang-type excesses (heat, inflammation, agitation). They cool the body, cleanse it and soothe it. In a therapeutic garden, Yin plants often create the gentle relaxation/healing zone – they can be placed in the shade, next to a bench, to provide both remedy and a peaceful ambience (think lavender scent, mint rustle, linden blossoms – they all induce serenity).

Balanced or neutral energy plants

Between the extremes of Yin and Yang, many plants are located in the moderate, balanced zone, having mild effects and being suitable for daily or preventive use. These are often plants with harmonious combinations of tastes, with a green or pastel color, which tone without overstimulating and purify without weakening. In the diet, macrobiotics recommends neutral foods (whole grains, seasonal vegetables) as a base[13]; similarly, in herbal medicine, neutral plants can be the basis of daily health care. Some examples:

· Chamomile, discussed above, can be considered balanced (slightly Yin) – that's why it's used frequently and safely by everyone, including children and the elderly, for a variety of problems.

· Rosehip (Rosa canina) – Rosehip fruits have a sweet-sour taste, rich in vitamin C (Yin), but also in tannins (slightly astringent Yang). Their effect is vitaminizing and slightly diuretic (Yin) but also general tonic (Yang). Overall, rosehips are balancing, ideal for strengthening immunity without overstimulating – that's why rosehip tea is a universal health drink.

· Horsetail (Equisetum arvense) – A plant rich in silicon and minerals (Yang) but acting as a moderate diuretic (Yin). Horsetail has poor taste, slow effect, strengthens bones (Yang) while cleansing the kidneys (Yin). It is considered neutral to slightly cold, therefore balanced, very useful in long use for remineralization.

· Mallow (Malva spp.) – The leaves / root of mallow are full of mucilage (Yin) and have a sweet bland taste, but they also contain a bit of tannin and complex sugars that nourish the intestinal flora (light tonic, Yang). Mallow protects and restores mucous membranes (Yin) without extreme effects; it is a neutral emollient, excellent as a gentle adjuvant in many medicinal teas.

Energy-balanced plants are valuable because they can be paired with others to moderate a formula. For example, in a cold tea (where Yang plants such as ginger and Yin plants such as mint enter), mallow or licorice can be added to harmonize the formula and protect the mucous membranes. In the garden, neutral plants are usually also the most hardy and easy to grow – reflecting the stability of their energy.

Conclusions and practical use of the Yin/Yang classification

The Yin-Yang perspective on plants gives us a holistic framework to better understand their actions and create balanced combinations. In a cleverly designed therapeutic garden, we can arrange the plants with these qualities in mind: for example, separating areas with warming plants from those with cooling plants, or planting in close proximity species that balance each other (a very Yang plant next to a very Yin one) to visually symbolize harmony. This classification can also guide their use in therapies: an organism with symptoms of excess Yang (fever, inflammation, hypertension) will benefit from infusions of Yin plants (refreshing, relaxing), while a person with Yang deficiency (poor circulation, coldness, fatigue) will be helped by Yang plants (stimulants, warmers). Of course, the correct diagnosis of imbalance and the extent of administration matter – Yin and Yang must always be in balancing dynamics, avoiding extremes.

The Yin/Yang energy classification of plants, although it comes from ancient traditions, is also beginning to be investigated in a modern scientific context. For example, Romanian researchers have proposed a method for evaluating the Yin or Yang tendency of Western plants based on the antioxidant vs. pro-oxidant profile; the pilot results indicated that marigolds have a "Yang profile", while the Mandarin, Oman, and Angelica have a predominantly Yin profile according to these biochemical tests[12]. Such studies validate to a certain extent the empirical observations of traditional medicine, creating bridges between ancestral knowledge and current science.

Conclusion, the Yin/Yang approach provides an integrative and intuitive way to organize common therapeutic herbs – both in the garden and in healing thinking. Using criteria such as shape, color, density, taste and composition, we can "read" the energetic nature of a plant and use it more appropriately to restore harmony in the body. A garden that incorporates the entire palette of plants from Yin to Yang becomes itself a space of balance, where each species has a complementary role in supporting health. By consciously cultivating and using these plants according to energetic principles, we reconnect to the rhythms of nature and the balance within ourselves – exactly the essence of macrobiotics and old holistic practices[13].

Sources

Yin-Yang macrobiotic principles and associated characteristics (color, growth, mineral content) are taken from reference works in the field[1][14]. The classification of foods and plants along this axis, including examples of strong Yin (spicy spices, mint, coffee) and strong Yang (meat, salt) food/plants, is documented in the macrobiotic literature[15]. For scientific validation, modern ethnobotany and phytotherapy studies have been consulted that attempt to quantify Yin/Yang concepts in Western plants[12]. This interdisciplinary approach ensures a deep study, with academic bases, but rendered in a language accessible to all.

[1] [3] [5] [6] [7] [8] [9] [11] [14] [15] MACROBIOTICS: HEALTH, HAPPINESS AND PEACE - Holistica

https://www.holistica.net/macrobiotics-health/

[2] [10] Yin-Yang Balance Concepts for Clinical Diagnosis and Treatment: An Integrated View of Chinese Medicine, Anesthesiology, and Quantum Mechanics

http://www.transpopmed.org/articles/tppm/tppm-2024-11-182.php

[4] SOUEN - Macrobiotic, Natural Organic Food

https://souen.net/yinfoods.html

[12] (PDF) Estimating the Yin-Yang Nature of Western Herbs: A Potential Tool Based on Antioxidation- Oxidation Theory

https://www.researchgate.net/publication/262560479_Estimating_the_Yin-Yang_Nature_of_Western_Herbs_A_Potential_Tool_Based_on_Antioxidation-_Oxidation_Theory

[13] Macrobiotics | Yin-Yang, Whole Foods & Balance | Britannica

https://www.britannica.com/topic/macrobiotics

Note: translation from Romanian made with the Microsoft Office document translator

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