What foods contain soy isoflavones?

Unfermented soy foods

Do soy isoflavones block estrogen?

However, the addition of high levels of dietary soy isoflavones tended to block estrogen effects in breast tissue. This finding suggests that postmenopausal women with higher levels of estrogen may derive the greatest benefit from soy.

How much soy isoflavones is too much?

However, most studies to date report that diets containing 10–25 mg — and perhaps even up to 50 mg of soy isoflavones per day — as part of a varied diet do not seem to have any harmful effects on ovulation or fertility ( 31 ). These amounts of soy isoflavones are equivalent to around 1–4 servings of soy foods per day.

What are the side effects of soy isoflavones?

Dietary supplements containing soy extracts are possibly safe when used for up to 6 months. Soy can cause some mild stomach and intestinal side effects such as constipation, bloating, and nausea. It can also cause allergic reactions involving rash, itching, and breathing problems in some people.

What fruits are high in isoflavones?

Currants and raisins were the richest sources of the isoflavones, containing 2,250 microg and 1,840 microg of the two isoflavones combined per kilogram of wet weight of food.

Does peanut butter have isoflavones?

While roasting increased the level of isoflavones (a type of phytoestrogen) in peanuts, peanut butter contained less phytoestrogens than fresh peanuts.

Does soy isoflavones make you gain weight?

The results showed that HSI increased the body weight (BW) gain and fat percentage of minipigs (P < 0.05). In addition, the serum concentrations of IGF-I and interleukin-6 were increased by high levels of soy isoflavones (P < 0.05).

Are isoflavones safe?

Animal studies have shown that evidence of the isoflavone genistein may have adverse effects on the developing female reproductive tract. When ingested on a short-term basis (up to six months in duration) soy is considered possibly safe. Common side effects may include: GI upset.

Do soy isoflavones cause weight gain?

The results showed that HSI increased the body weight (BW) gain and fat percentage of minipigs (P < 0.05). The data indicated that soy isoflavones regulated the BW gain and fat percentage of Chinese Guangxi minipigs, which also showed changes in IGF-I system and PPARγ.

Do soy isoflavones help hot flashes?

Soy isoflavones are about one third as effective as estrogen in reducing hot flashes. However, prolonged daily soy consumption has been shown to reduce important menopause-related inflammatory proteins.

Is isoflavones safe to take?

Unconjugated soy isoflavones appear to be safe and well tolerated in healthy postmenopausal women at doses of 900 mg per day.

What food has the most isoflavones?

Soy
Soy and its products, and legume seeds (lentils, beans, peas) are the richest sources of isoflavones, including genistein and daidzein [2]. Moreover, small amounts of isoflavones are also contained in other plant products (cereals, potatoes, vegetables, fruits), as well as in milk, meat, and beer [1, 2].