l carnitina sirve para aumentar masa muscular L-Carnitina Nutrition Research | Quemador de grasas L-Carnitina - 1000 mg. –
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PMID: 33084011

2021 Sep 4;69
Supplementing the wheat diet with lysine (0.2 %) together with threonine was effective in mitigating the negative impact of carnitine deficiency induced by the lack of dietary lysine in rats [34]

These injections have been shown to help some men: Collagenase injections are used to break down certain tissues