It is not. Yam may have beneficial effects and it may be useful for some conditions, but it is not the same as progesterone. Use in pregnancy requires careful physician surveillance. Progesterone can also cause bloating, breast tenderness, weight gain, headache, moodiness, and irregular vaginal bleeding. Progestegens can cause some medical conditions to worsen examples are asthma, heart failure, epilepsy, and migraine headache.
Natural progesterone tends to have fewer side effects.
Soy Soy foods contain several ingredients that may be useful in preventing disease. Isoflavonoids, such as genistein and daidzein are weak estrogens and may lessen the risk of osteoporosis and heart disease. A study at Bowman Gray Medical School showed twenty grams of soy a day decreased hot flashes. Compared to a placebo group it also lowered both blood pressure and cholesterol. A study at the University of Illinois showed a significant increase in bone density after six months of a high soy diet.