Why don’t your whole herbs have a Best by Date?
A Best by Date is indicative of the shelf life of a product. The shelf life is the length of time that herbal products are given before they are considered unsuitable for sale, use, or consumption. The stability of a product is dependent upon a host of factors: the product form; the nature of the individual ingredients and their rates of oxidation; the packaging and storage conditions, etc.
The FDA final GMP rule for dietary supplements does not require the establishment of product expiration dates. But it does stipulate that any expiration/best by date placed on a product label must be supported by data, reserve samples must be maintained for one year past the shelf-life date, and dating claims must be tested by either accelerated or long-term studies.
Mayway does not have stability testing data and does not make claims as to the shelf life of the herbs and herb powders it sells. Subsequently, Mayway does not provide expiration dates for these products.