Buy nutricology/allergy research group : pure vitamin c cassava powder, 120 gm

Pure vitamin c cassava powder

Pure, unbuffered ascorbic acid in powder form. Cassava, or 
Manihot esculenta, is a bushy South American shrub with long 
tuberous roots, which are traditionally eaten like potatoes. 
Cassava root starch serves as the starting material for a 
multi-step chemical process of manufacturing ascorbic acid. It 
is well tolerated by individuals unable to tolerate other 
sources of vitamin C.*

Each 1/4 teaspoon (1g) 
contains:
Vitamin C (as Ascorbic Acid) 1000 mg

Suggested 
Use:
As a dietary supplement, 1/4 to 1/2 teaspoon or more in 
4-8 oz. of desired liquid, with meals, or as directed by a 
healthcare practitioner.