l carnitine l tartrate when to take Nature's Bounty L-Carnitine 500 mg, 30 Tablets Pure Original Ingredients, L-carnitine Tartrate,

We refer to it as injectable-like results, without the injection

PMID 8145281.

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More specifically, the present invention relates to a process for preparing L-carnitine or acetyl L-carnitine hydrochloride, comprising sequentially synthesizing racemic 4-chloro-3-hydroxybutyronitrile of Formula 2 and racemic 4-chloro-3-hydroxy butyric acid alkyl ester of Formula 3 under specific reaction conditions, using racemic epichlorohydrin of Formula 1 as a starting material, preparing (R)-4-chloro-3-hydroxy butyric acid alkyl ester of Formula 4 from stereoselective hydrolysis of the racemic 4-chloro- 3 -hydroxy butyric acid alkyl ester in an aqueous solution using an enzyme, and preparing L-carnitine of Formula 6 or acetyl L-carnitine hydrochloride of Formula 7 from the (R)-4-chloro-3-hydroxy butyric acid alkyl ester

Other TB-500 research has suggested it helps with wound healing and with hair growth

It also depends on what you want to achieve