- Catalog Powders, Medium Quantity DiscountUniform mixture of 50mg Tetrahydrobiopterin (BH4) and 950mg Ascorbic Acid for stability purposes. Total weight is 1000mg, or 1 gram. 50mg of mixture is equivalent to 2mg BH4. Please confirm total weight with a milligram scale on receipt.WARNING: 1000mg is a tiny amount, expect a small amount of total powder.$60.00
Ships with thermal packaging. Not eligible for free shipping.