Are Hyland's products regulated?
Yes, the manufacturing and marketing of Hyland's homeopathic medicines are regulated as drugs by the FDA.  The FDA has regulated homeopathic medicines since 1938.

Do these tablets expire?
No, they don't expire, and we don't put expiration dates on the products, as they have been exempted from expiration dating guidelines by the FDA (CFR 211.137)  The numbers that are imprinted on the edge of the labels are lot numbers - so we know exactly when the product was produced.  We can track any product we make using that number.