In shortL-Carnitine (CAS 541-15-1) is a component involved in lipid metabolism, used in diet and sports products. In addition to the hygroscopic free form, easier-to-handle salt forms such as tartrate and fumarate are available.
What L-carnitine is
L-carnitine is involved in fatty-acid transport and is used for body-fat and exercise-related positioning. Handling varies by form.
Salt forms & sourcing
The free form is highly hygroscopic, so tartrate (L-carnitine L-tartrate) or fumarate is easier to handle in formulation. CAS and assay differ by form, so confirm. See functional ingredients.
FAQ
Free form or salt—which to use?
The free form is highly hygroscopic; tartrate and similar are easier to handle. Select by use.
Does CAS differ by form?
Yes. The free form is 541-15-1; tartrate and fumarate have separate CAS numbers.
Can it be used in drinks?
It is water-soluble and usable. Mind hygroscopicity and stability.