, natural source isoflavones from soya not red clover, still one of the strongest products available a true one-a-day formula; easy to swallow tablets, notice the difference or your money backnatures' best soya isoflavones is still one of the strongest products available reflecting the level & profile of isoflavones used by researchers in scientific investigations of note.the level of isoflavones present in many 'high street' products can be confusing as some companies label soya extract as being all isoflavones. this is never the case as the isoflavones are only ever present as part of the soya extract. at nature’s best we allow for this when listing the isoflavones level so that each tablet provides a full 50mg of pure isoflavones.there is a growing body of evidence in the scientific literature that eastern diets may provide higher levels of cell protective nutrients such as isoflavones than western diets. soya isoflavones have become popular supplement with women approaching or going through the menopause & there is increasing evidence that they may contribute to maintaining bone health.red clover is a source of isoflavones however we prefer to use isoflavones from soya since this is naturally found present in our diet.