Comprehensive guide for vegan athletes: which nutrients are lacking in a plant-based diet and how to supplement them. B12, D3, omega-3, iron, zinc, creatine.

A vegan diet can be perfectly compatible with sports, but it requires more careful planning. A plant-based diet naturally lacks or is low in certain critically important nutrients. With smart supplementation, vegans can achieve the same athletic results as omnivores.
| Material | Why Are Vegans Deficient? | Recommended Form | Dose | Priority |
|---|---|---|---|---|
| Vitamin B12 | Found ONLY in animal products | Methylcobalamin (better than cyano-) | 1000-2500 mcg/week. | CRITICALLY ESSENTIAL |
| Vitamin D3 | Sunlight is not enough; D3 is usually from lanolin | D3 from lichen (vegan) | 2000-5000 IU/day. | CRITICALLY ESSENTIAL |
| Omega-3 (EPA/DHA) | Flaxseed ALA conversion is too weak | Algal oil (EPA+DHA) | 300-500 mg DHA+EPA | Very important |
| Iron | Plant-based (non-heme) iron is absorbed less efficiently | Iron bisglycinate | 18 mg/day for women; 8 mg for men | Very important |
| Zinc | Phytates in plants block zinc absorption | Zinc picolinate or citrate | 25-30 mg/d. | Very important |
| Creatine | Naturally found only in meat/fish | Creatine monohydrate (synthetic — vegan) | 5 g/d. | Very important for athletes |
| Calcium | Without dairy products, it may be difficult to get enough | Calcium citrate (better than carbonate) | 500-1000 mg/d. | Important |
| Iodine | Main source — seafood, milk | Iodized salt or supplement | 150 mcg/day | Important |
B12 deficiency causes irreversible nerve damage. Symptoms appear only after several years, when it is already too late. Vegans MUST take B12 supplements — no exceptions.
Vegans have 30-50% lower creatine stores in their muscles than omnivores. Therefore, the effect of creatine supplements for vegans is EVEN GREATER! This is one of the best supplements for a vegan athlete.
Algal oil is the original omega-3 source (fish also get omega-3 by eating algae!). A direct DHA+EPA source without the risk of contaminants.
A pea + rice protein blend provides a complete amino acid profile. Soy isolate is also an excellent choice with the highest bioavailability among plant proteins.