There have been some concerns about whether the presence in soya of isoflavones, a plant-made oestrogen or "phytoestrogen," should cause women to be wary of soya. However, experts say that as part of a balanced diet, soya protein can make a good low-fat alternative to high-fat, animal-based proteins for both women and men.
Many other health claims about soya suggest an inconclusive mix of benefits and risks. The key, as in so many things, is moderation.
Soya comes from the soybean and can be found in soya milk, tempeh, edamame and tofu. Whole soya provides all the essential amino acids, just like protein from animal sources. It is also used as a meat substitute in some vegetarian dishes.