Methods Eligibility criteria The PICOS strategy was defined as follows: P (participants) human subjects, I (interventions) oral LC treatment, C (comparisons) between supplementation and placebo, supplementation and control, or pre- and post- supplementation, O (outcomes) muscle variables, and S (study design) randomized controlled trials, non-randomized controlled trials, non-randomized non-controlled trials
We report inconsistent association between various types of carnitine and breast cancer
However, risks like allergic reactions, kidney strain, or mild injection-site discomfort may occur, so medical supervision is essential
long-term safety data is absent
P-21 ships as a 5 mg lyophilized (freeze-dried) vial, so anyone following the subcutaneous route community sources describe has to reconstitute it with bacteriostatic water first the same mechanical step as any injectable peptide
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