L-Carnitine fumarate powder, which is one form of L-Carnitine, by BulkSupplements.com is one of the selections of amino acids supplement. Carnitine is an amino acid that is produced from lysine and methionine and can be obtained through supplementation.* Each serving of this product contains 500mg or L-Carnitine fumarate which is about 1/5 tsp, and may need a milligram scale to measure. Contents of this product is sold by weight, not volume and settling may occur. And, we also sell it different sizes ranging from 100g to 5kg in resealable bags. Our L-Carnitine fumarate powder, which is a carnitine supplement, is pure, clean, and does not contain any fillers, additives and artificial flavors. And this carnitine supplement is dairy free, gluten free, soy free, yeast free, no added sugar. All products by BulkSupplements.com are manufactured according to cGMP Standards to ensure the highest quality for manufacturing, packaging, labeling, and holding operations. We work with a third-party laboratory that test our products at multiple stages during production, from raw material to finished products, and ensures compliance, standards, and consistency.