Polyphenol supplements are generally safe to consume and do not have any significant side effects. However, some people may experience mild digestive issues such as bloating or stomach upset.

Finally, polyphenol supplements aren’t regulated, and many contain doses over 100 times larger than those in foods. More research is needed to establish safe and effective dosages, ...

Supplements may have detrimental doses of polyphenols in one capsule. Consider third-party tested supplements to ensure the ...

Polyphenols may have several unwanted side effects, however. These are most common when taking polyphenol supplements instead of getting them naturally through food.

Polyphenols are compounds found in plants, including flavonoids and phenolic acid, ... Some supplements contain polyphenols in higher quantities than would be consumed in a healthful diet.

Polyphenols are micronutrients that naturally occur in plants. They’re included in many supplements, though they’re also easy to get in your diet from foods like fruits, vegetables, teas, and ...

Plant polyphenols show promise in combating aging, ... supporting the development of new therapies and supplements to prevent age-related diseases while reducing pharmaceutical use. ...

Polyphenols - a key component of Mediterranean diets and found in berries, grapes, green tea, and cocoa - may delay cognitive decline by preserving brain function and structure through gut ...