Vegan and Vegetarian Diets Through a TCM Lens

Name: Dr (TCM) Attilio D'Alberto
Brand: Dr (TCM) Attilio D'Alberto
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By Dr (TCM) Attilio D'Alberto | Traditional Chinese Medicine Practitioner, Wokingham, Berkshire

Plant-based eating is one of the largest dietary movements of the last two decades. Vegan diets exclude all animal products; vegetarian diets exclude meat and fish but retain dairy and/or eggs; pescatarian diets retain fish; flexitarian diets emphasise plants but include occasional animal foods. The motivations — ethical, environmental, religious, health-related — are widely shared. From a traditional Chinese medicine perspective, plant-based diets have a distinctive energetic signature that suits some constitutions naturally and requires careful construction for others. The difference between thriving and struggling vegan eating is rarely the philosophy but almost always the food choices.

On this page

What is a plant-based diet?
Origin and history
The modern science
The TCM signature of plant-based diets
Organ-by-organ effects in TCM
Constitutions that thrive on plant-based
Constitutions that need care
The blood-deficiency issue
Plant-based and fertility
Plant-based and specific conditions
Side effects in TCM terms
TCM modifications for vegans
Sample TCM-aligned vegan day
Supplements that matter most
Common vegan mistakes
Frequently asked questions
Related pages

1. What is a plant-based diet?

The terms vary in strictness:

Vegan — excludes all animal products: meat, fish, dairy, eggs, honey. Includes only plants, fungi, fermented foods and seaweed.
Vegetarian (lacto-ovo) — excludes meat and fish; retains dairy and eggs.
Lacto-vegetarian — retains dairy, excludes eggs.
Pescatarian — excludes meat; retains fish, dairy and eggs.
Flexitarian — mostly plants, with occasional small portions of meat, fish, dairy or eggs.
Whole-food plant-based (WFPB) — vegan with the additional requirement of minimal processed food, low oil, no refined sugar.
Raw vegan — vegan with most food eaten raw, below 42°C cooking temperature.

The TCM impact differs significantly between these. A lacto-ovo-vegetarian Mediterranean-style diet with eggs, dairy and fish is very different from a strict raw vegan diet, both nutritionally and energetically.

2. Origin and history

Vegetarianism is ancient: Pythagoras, Buddhist and Jain traditions in India and Asia, Christian monastic traditions, the Adventist tradition. Buddhist monastic vegetarian cuisine, which is the closest historical model to TCM-aligned plant-based eating, developed over centuries in China, Japan and Korea, and includes dairy (in Tibetan Buddhism), eggs (in some traditions), and a wide variety of carefully constructed vegetable proteins (tofu, tempeh, fermented soy, mock meats made from wheat gluten and mushrooms) balanced with grains, beans, mushrooms and seaweeds.

Modern Western veganism dates from 1944 with Donald Watson and the founding of the Vegan Society in the UK. Mainstream growth began in the 1970s with health-focused movements (Pritikin, Ornish), accelerated in the 2000s with environmental concerns, and exploded in the 2010s with documentaries (Forks Over Knives, The Game Changers), commercial products (Beyond Meat, oat milk) and social media. By 2024, around 5% of UK adults identify as vegan and 10–15% as vegetarian, with substantial flexitarian populations on top.

From a TCM history perspective, the traditional Chinese diet is not vegetarian; even Buddhist vegetarian cuisine includes substantial vegetable protein and dairy. The classical principle is that plant-based eating can be deeply nourishing — it just takes deliberate construction.

3. The modern science

The evidence base for plant-based eating is broadly favourable in several specific areas:

Cardiovascular disease — consistent reductions in LDL cholesterol, blood pressure and cardiovascular events; the strongest evidence area.
Type 2 diabetes — reduced incidence and improved glycaemic control on whole-food plant-based diets.
Some cancers — modestly reduced risk of colorectal cancer; mixed evidence for other cancers.
Weight — vegans tend to be leaner on population studies, though this is partly self-selection.
Environmental impact — substantially lower greenhouse gas emissions, land use and water use per kcal.

Areas of risk:

Vitamin B12 deficiency — near-universal in long-term unsupplemented vegans
Iron deficiency anaemia — common in menstruating vegan women
Omega-3 DHA — conversion from ALA is poor; algal supplementation usually needed
Iodine, zinc, calcium, vitamin D — commonly low without attention
Bone health — mixed evidence; possibly lower bone density in vegans, particularly in older adults
Reproductive function — some evidence of subtle reductions in fertility markers, though confounded by lifestyle factors

The contrast between the population evidence (favourable for plant-based eating) and the individual nutrient risks (real and significant) reflects the difference between a population average and an individual's diet quality. A well-constructed plant-based diet captures most of the benefits and avoids most of the risks; a poorly-constructed one captures few benefits and many risks.

4. The TCM signature of plant-based diets

Plant-based diets are cooler, lighter, qi-moving but blood-deficient by default unless deliberately constructed. Animal foods are the strongest blood tonics in TCM — red meat, liver, eggs and bone broth all build blood directly. Plant foods can build blood (dark leafy greens, beetroot, mulberries, goji berries) but require a much greater volume and combination to reach the same effect.

The energetic logic:

Most plant foods are cooling or neutral. The diet trends towards cool unless deliberately warmed with spices and cooking methods.
Plants provide carbohydrates and fibre abundantly. The Spleen, which thrives on sweet flavour, is well-supported on grains, root vegetables and pulses.
Plants provide protein in lower density per kcal than meat. Larger volume of food is needed to meet protein requirements; a small Spleen can struggle.
Iron, B12 and omega-3 DHA are the bottleneck nutrients. Without supplementation or careful food choice, blood deficiency develops.
Soy is central in well-constructed plant-based diets. Tofu, tempeh, edamame, soy milk — all have specific TCM properties (mostly cooling, mildly damp).
Cold raw food in volume can chill the Spleen. Salads, smoothies, juices, cold sandwiches: a daily diet of these depletes Spleen yang over time.

5. Organ-by-organ effects in TCM

Spleen: well-supported on cooked grains, beans and root vegetables; weakened by raw cold food and excess soy. Cooking method matters most.
Liver: usually unburdened on plant-based eating; less damp-heat from animal fat; abundant Liver-blood-building greens if consumed.
Kidney: requires careful construction. Walnuts, black sesame, black beans, kidney beans support Kidney; without these, yang and essence gradually deplete.
Heart: typically calm if blood is well-built; restless if blood deficiency develops, with palpitations, anxiety, insomnia.
Lung: well-supported on Lung-moistening plant foods (pear, lily bulb, white fungus, almonds).
Stomach: usually well-tolerated unless raw food predominates, in which case Stomach yang weakens.
Large Intestine: consistently improved on plant-based eating with abundant fibre.

6. Constitutions that thrive on plant-based

Damp-heat constitution: oily skin, acne, bitter taste, irritability, dark concentrated urine. Plant-based eating cools and clears damp-heat naturally. People with this constitution often feel dramatically better within weeks of removing meat.
Yang excess and Liver fire patterns: red face, irritability, hypertension, headaches with heat. Plant-based reduces internal heat.
Inflammatory illness recovery: autoimmune disease in active flare, eczema, psoriasis. The reduced inflammatory load of plant-based eating is therapeutic for many.
Cardiovascular and metabolic risk: the modern evidence base is strong; the TCM correlate is reduced damp-heat, Liver fire and blood stasis.
Mild qi stagnation patterns: the lighter, more aromatic plant foods (citrus, mint, fennel, ginger) support smooth qi flow.
Acid reflux, gallstones and digestive complaints from rich meat-heavy diets: plant-based eating is often dramatically relieving.
People with strong ethical motivation — the alignment between values and food contributes to mental health and adherence.

7. Constitutions that need care

Blood deficiency: pale, low energy, light periods, dizziness when standing, brittle nails. Plant-based can rapidly worsen this without deliberate blood-building food choices.
Kidney yang deficiency: cold extremities, low libido, lower back ache, frequent urination. Plant-based without compensation drives this constitution further into cold.
Qi deficiency: tired, breathless, soft voice, loose stools. The Spleen needs careful warming food choices on plant-based eating.
Pregnancy in already-malnourished women: unlikely in modern UK but a real concern. Pregnancy increases iron, B12, choline and DHA needs that are harder to meet plant-based.
Children without expert guidance: growing children have high protein, iron, B12, calcium, zinc and DHA needs. Vegan childhoods are possible but require careful planning.
Couples trying to conceive: both male and female fertility require adequate animal-source nutrients. See the fertility section below.
Postpartum women: the postpartum period demands intense blood-building. Vegan postpartum recovery is the hardest scenario; specialist guidance is strongly advised.
Athletes with heavy training loads: achievable but requires strict attention to protein quality, calorie intake and recovery.
Older adults: sarcopenia (muscle loss) accelerates with low protein intake; plant-based older adults need higher protein targets and careful supplementation.

8. The blood-deficiency issue

Blood deficiency is the single most common TCM pattern in long-term vegan women, particularly those who have not deliberately constructed their diet. Symptoms develop slowly over months to years: pale complexion and lips, lighter or scantier periods, dizziness when standing, brittle nails with vertical ridges, dry hair and skin, anxiety and disturbed sleep, palpitations, poor memory, restless legs.

The two main mechanisms are:

Iron: non-haem iron from plants is much less bioavailable than haem iron from meat. Vegan diets need 1.8× the iron RDA, plus vitamin C with each iron-rich meal, and avoidance of tea and coffee around iron-rich meals.
B12: not produced in any meaningful quantity by plants. Without supplementation, vegans develop subclinical B12 deficiency over 2–5 years — an early cause of fatigue, pallor and neurological symptoms.

Blood-building plant foods to include daily:

Dark leafy greens cooked: kale, spinach, chard, spring greens, rocket
Beetroot (cooked or juiced)
Mulberries, goji berries, red dates (jujube), dried longan
Black beans, kidney beans, lentils, chickpeas
Black sesame seeds, walnuts, almonds
Prunes, dried apricots, raisins
Tempeh, tofu, fermented soy
Quinoa, amaranth (complete proteins)
Seaweeds: nori, wakame, kelp (also for iodine)

9. Plant-based and fertility

For both partners trying to conceive, plant-based diets need particular attention:

Female fertility: blood, qi and Kidney essence are the foundations of conception. Animal foods build all three more efficiently than plants. Vegan women trying to conceive should aim for: 60–80 g protein/day from beans, lentils, tofu, tempeh and quinoa; deliberate iron-pairing with vitamin C; supplementation of B12, vitamin D, omega-3 (algal DHA), choline and folate.
Male fertility: sperm production requires zinc, B12, vitamin D, omega-3 and adequate protein. Vegan men with fertility concerns should consider including eggs and small amounts of fish if not strictly vegan, or supplement carefully.
The middle path: a "Mediterranean plant-forward" diet — mostly plants with small amounts of fish, eggs and dairy — is often a more sustainable fertility-supportive approach than strict veganism. This aligns with TCM tradition where animal foods appear regularly but in small portions.
Soy and oestrogen: moderate soy (1–2 servings of whole soy foods per day) does not impair fertility and may slightly improve outcomes; very high soy intakes (4+ servings) have mixed evidence.
For IVF preparation: a 90-day window of optimised plant-based eating with all fertility-relevant supplements is feasible but requires planning. Many IVF clinics now have dietitians familiar with vegan protocols.

Pregnancy on a vegan diet is possible and increasingly common, but specialist support is wise. The British Dietetic Association and the American Dietetic Association both consider well-constructed vegan pregnancy adequate, with attention to specific nutrients.

10. Plant-based and specific conditions

PCOS: often helpful for the metabolic component; blood-deficiency aggravation in lean PCOS needs attention.
Endometriosis: mixed evidence. Reduced animal fat and dairy can help inflammation; soy phytoestrogens have variable effects.
Hashimoto's thyroiditis: mixed; some patients improve, others develop iodine, selenium or zinc deficiency.
Rheumatoid arthritis: trials show improvement in symptoms on whole-food plant-based diets.
Eczema and psoriasis: often improves, particularly with reduction of dairy and red meat.
Migraine: reduced animal-fat intake may reduce frequency; some trigger foods (chocolate, nuts, fermented soy) can flare.
Type 2 diabetes: well-evidenced benefits from whole-food plant-based eating.
Cardiovascular disease: the strongest evidence area; consistent benefit.
Depression: mixed; some trials show improvement, others suggest B12 or omega-3 deficiency can worsen mood.

11. Side effects in TCM terms

Persistent fatigue and pallor — blood deficiency, often from iron and B12 inadequacy
Lighter or absent periods — blood deficiency or qi deficiency
Hair shedding and dry hair — blood and Kidney essence depletion
Brittle nails with ridges — classic Liver-blood deficiency
Cold hands and feet, intolerance to cold — Kidney yang deficiency from cold raw plant food
Bloating and loose stools — Spleen weakened by excessive raw vegetables, smoothies and beans without proper cooking
Poor wound healing — insufficient protein, zinc and B12
Mood instability, anxiety, depression — B12, omega-3 and blood deficiency
Loss of libido — Kidney essence depletion
Tinnitus and dizziness — Kidney yin deficiency or B12 issues

These are not arguments against plant-based eating — they are signs that the diet needs better construction or supplementation, not that plants are the wrong choice.

12. TCM modifications for vegans

Eat plenty of cooked grains and beans — never rely on raw plant food only. The Spleen needs warm cooked food.
Iron-rich plant foods with vitamin C: black sesame, prunes, dried apricots, dark leafy greens, lentils + lemon juice or pepper or kiwi.
Vitamin B12 supplementation is essential — not optional. 1000 mcg per week or 25 mcg daily.
Add warming spices: ginger, cinnamon, cumin, turmeric, black pepper. Plant-based eating tends to cool the body; these compensate.
Avoid cold smoothies and salads in autumn and winter. Switch to cooked vegetables, soups, porridges and stews from October to March.
Include blood-building plant foods regularly: red dates, goji berries, mulberries, beetroot, dried longan.
Include Kidney-supporting plant foods: walnuts, black beans, kidney beans, sesame, Chinese yam.
Use fermented soy (tempeh, miso, natto, soy yoghurt) rather than processed soy. The fermented forms are more digestible and Spleen-supportive.
Pay attention to your menstrual cycle: if periods get lighter or irregular, your blood-building is insufficient. Add more legumes, dark greens and consider whether eggs or modest fish would help.
Rotate protein sources: beans, lentils, tofu, tempeh, quinoa, seitan, nuts and seeds. Variety supports completeness.
Cook with sesame, olive or avocado oil rather than industrial seed oils.
Use bone-broth-equivalent plant stocks: seaweed-mushroom stock with onion, ginger and miso provides minerals and umami without animal foods.

13. Sample TCM-aligned vegan day

For a vegan adult in autumn-winter:

On waking: warm water with ginger or lemon
Breakfast: oat porridge with stewed apple, walnuts, black sesame, cinnamon, a few red dates
Mid-morning: herbal tea (chrysanthemum or ginger); a small handful of pumpkin seeds
Lunch: warm grain bowl — brown rice, lentils, sauteed kale, roasted sweet potato, tahini and lemon dressing, with miso soup on the side
Afternoon: green or oolong tea; a piece of fruit or 2 prunes
Dinner: tempeh stir-fry with mushrooms, ginger, garlic, broccoli and red pepper served with quinoa; warm seaweed-mushroom soup
Evening: chamomile or lemon balm tea; bed by 10.30pm

Daily supplementation: vitamin B12 (or weekly higher dose); algal DHA omega-3; vitamin D in winter.

14. Supplements that matter most

For long-term vegans, the priority supplements are:

Vitamin B12 — 25 mcg daily or 1000 mcg weekly. Non-negotiable.
Vitamin D — 1000–2000 IU daily, especially through winter.
Omega-3 DHA — algal source, 250–500 mg daily. Plant ALA conversion to DHA is too inefficient to rely on.
Iron — only if deficient on bloods; routine supplementation is not necessary if diet is well-constructed. Test ferritin annually.
Choline — particularly important pre-conception and in pregnancy; 425 mg/day for women, 550 mg/day for men.
Zinc — for male fertility and immune function.
Iodine — if not eating seaweed regularly.
Calcium — if not eating fortified plant milks, leafy greens or tofu daily.
Selenium — one or two Brazil nuts daily, or supplement.
Creatine — for athletes; not synthesised from plants.

15. Common vegan mistakes

Skipping B12 supplementation. The most damaging single mistake; develops slowly, with neurological consequences that may not fully reverse.
Replacing meat with ultra-processed alternatives. Beyond Burger and similar are no better than the meat they replace.
Daily smoothies and salads as the foundation. Cold raw plant food in volume chills the Spleen.
Inadequate protein. 0.8 g/kg is the floor; many active women need 1.2–1.6 g/kg, achievable on plants but requiring deliberate eating.
Going vegan during a fertility-preparation phase without adjustment. The transition is often the worst time to do conception work.
Reliance on coffee and stimulants as energy substitutes. Borrows yang energy from already-thin reserves.
Not testing iron, ferritin, B12 and vitamin D yearly. Catching deficiency early is much easier than reversing established symptoms.
Excessive raw food year-round. Cooked food in autumn and winter is essential for most constitutions.
Too much soy in unfermented form. Excess processed soy can be damp-forming; fermented soy is gentler.
Going strict-vegan in postpartum period. The blood-building demands of postpartum recovery are the hardest to meet plant-based.

16. Frequently asked questions

Can I be a healthy vegan in TCM terms?

Yes — with careful construction. The framework requires deliberate blood-building food choices, supplementation of B12, vitamin D, omega-3 and others, and seasonal adjustment of cooking method (more cooking in winter). Many of my patients are healthy long-term vegans with regular cycles, good energy and sound sleep.

Should I add eggs and fish for fertility?

If you are willing, yes — even small amounts make blood-building substantially easier. If not, the diet can be constructed with plants alone, but it takes more attention. The "Mediterranean plant-forward" pattern (mostly plants with eggs and small amounts of fish) is often the most sustainable fertility approach.

Why are my periods getting lighter on a vegan diet?

Lighter periods are the classic TCM blood-deficiency presentation. Causes: insufficient iron, low calorie intake, B12 deficiency, inadequate protein. Test ferritin and B12; add red dates, goji berries, mulberries, dark leafy greens, beetroot and consider adding eggs.

Is soy bad for me?

Whole and fermented soy in moderate amounts (1–2 servings/day) is fine for most people, including women with breast cancer history and those trying to conceive. Highly processed soy products, soy isolates and very high intakes may be problematic. Tempeh, miso and natto are the most TCM-friendly forms.

What about my children — is vegan safe for them?

Possible but requires expert support. Children have high protein, iron, B12, calcium, zinc, DHA and calorie demands per kg body weight. A pediatric dietitian familiar with vegan diets should be involved, with regular bloods and growth monitoring.

Should I go vegan for the planet?

Plant-based eating has a substantially lower environmental footprint, and reducing meat (particularly red meat and dairy) is one of the highest-impact individual climate actions. Whether full veganism vs flexitarian eating is best for you depends on your constitution and life stage. Even a 50% reduction in animal foods captures most of the environmental benefit.