l-carnitine make you gain weight doesn't magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and you'll feel the difference @Marybosch shows us how L-Carnitine will boost your Best Time to Take L-Carnitine:

Brand J, Dehm S

In one dose, you will supplement your body with 3,000 mg of l-carnitine

Can Acetyl L-Carnitine cause anxiety

[DOI] [PubMed] [Google Scholar] 29.Poortmans J.R., Auquier H., Renaut V., Durussel A., Saugy M., Brisson G.R

This is a preview of subscription content, access via your institution Access options Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription 17.99 / 30 days cancel any time Subscribe to this journal Receive 12 print issues and online access 119.00 per year only 9.92 per issue Buy this article Purchase on SpringerLink Instant access to the full article PDF

Another limitation was the lack of measuring the stress factors related to the hypothalamus-pituitary-adrenal axis such as corticosterone, which may have helped explain the possible neurophysiological impact of LCR supplementation