Allergy Research Group N-Acetyl Glucosamine 500 mg 90 caps
N-Acetyl Glucosamine (NAG) from vegan source. NAG has glucosamine attached to an acetic acid molecule, whereas glucosamine sulfate has it attached to a sulfuric acid molecule. Although research suggests that glucosamine sulfate is better absorbed than NAG, individuals sensitive to sulfur may tolerate NAG better.