On this product's label, GymBeam does not state a specific salt or form of L-carnitine, which is less precise than products that explicitly state, for example, L-carnitine L-tartrate (LCLT) - a form that has been used in several clinical studies on athletic recovery (Waldman et al., 2021). An unspecified 'base' is functionally similar but less precisely standardized, so the formula's transparency is somewhat lower in this aspect, even though the total carnitine dose (2200 mg) itself is adequate.

The report was issued by the independent laboratory Labor Dr. Scheller in December 2025 and covers microbiology and heavy metals for a specific batch (500 ml, orange flavor). Since it is a publicly available PDF document tied to a specific batch and relatively recently tested (less than a year old), this represents one of the best levels of testing transparency among products with this type of ingredient that we have analyzed - a comparable level of testing is offered, for example, by the NSF Certified for Sport certification program, which also verifies label compliance with actual content (NSF International, 2026).

The manufacturer recommends one dose (10 ml) daily, which corresponds to 2200 mg of L-carnitine and is within the range used in clinical studies (30-360 days of continuous use, Pooyandjoo et al., 2016). At moderate doses of up to approximately 2 g/day, carnitine is considered safe for long-term use in healthy adults (NIH ODS, 2023); however, with chronic consumption of higher doses, there are also cautionary notes regarding the TMAO metabolite associated with cardiovascular risk, so we recommend coordinating long-term use of large doses with a doctor if you have risk factors.

L-carnitine is indeed a substance naturally present in the body, but that doesn't mean the entire product is free of additives - for palatability and shelf stability of the liquid product, the manufacturer uses artificial sweeteners (acesulfame K and sucralose), preservatives, and colorings. This is not a safety risk in the narrow sense for healthy adults at moderate consumption, but it is good to know if you prefer to avoid artificial sweeteners and colorings - in that case, a pure powder product without additives would be a more suitable choice.