If you really want to know what you are getting, you can always request to see the Certificate of Analysis for the serine you are buying. If your supplier does not have one, well, … they should. Remember, you may be using this as you would any other drug, you want to know what you are getting.
Make sure you understand the difference between food grade and pharmaceutical grade. Read about it on our page here!
Here are two certificates for lots of l-serine we have sold. Current certificates are available and are extremely similar to those here. All lots will be from the same two manufacturers and tested to the same standards as shown here.
Pharmaceutical Grade L-Serine (sample, may not be current, COA):
(NMT = “Not More Than”)
Food Grade L-Serine (sample, not current, COA):