L-carnitine, often referred to as an amino acid, is technically a "vitamin-like" and "amino-acid-like" compound related to B vitamins
Well look at the common and rare side effects and what precautions to take
Low NAD+ leads to unstable genes and poor DNA damage response

Notice to Prospective Investors in the United Kingdom In addition, in the United Kingdom, this document is being distributed only to, and is directed only at, and any offer subsequently made may only be directed at persons who are qualified investors (as defined in the Prospectus Regulation) (i) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended, or the Order, and/or (ii) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order, all such persons together being referred to as relevant persons, or otherwise in circumstances which have not resulted and will not result in an offer to the public of the shares in the United Kingdom within the meaning of the Financial Services and Markets Act 2000, as amended

Magnesium supplementation should be individualized based on laboratory results rather than routinely recommended, particularly in patients with kidney disease