Oyster (Ostrea) Shell Extract 4:1

4:1 is a reference to the strength of the evaporated decoction (alcohol and/or water) from which the concentrated herb powder is made: 4 parts of botanical to 1 part native extract.

Our herbal extracts are produced in GMP compliant facilities. Certificates of analysis (COA) are available for all our herbs.

Please contact us for a Certificate of Analysis (COA) or for large quantity pricing.