Brief Answer:
This is the problem.

Detailed Answer:
There is absolutely no government regulation of the herbal and supplement market in the United States. The purity potency shelflife vary great deal even within lot numbers. What is in the bottle is not necessarily the same as what is on the label. In addition any advertising claims can be made regarding general benefits as long as there's not a promise to cure a specific disease. Some are even contaminated with prescriptive meds or biologic impurities. Because of this the manufacturer is protected from liability. Many herbs, if they have a biologic activity, might also factor developing fetus. I would not recommend this product during pregnancy. The good news is that the higher hormonal levels are going to help your hair nails be better than they've been when not pregnant. In addition you're going to be taking a prenatal vitamin that will overlap with the vitamin ingredients on the provided label. They're probably more helpful than the proprietary mixture of herbs. I think you'll be pleased with your hair and nails during pregnancy without the supplement.

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