l-carnitine in energy drinks Drink "Strawberry", 500 ml L-Carnitine drink flavour Grapefruit 500ml

Beziere N, Lozano N, Nunes A, Salichs J, Queiros D, Kostarelos K, et al

Toxicological Sciences: An Off J Soc Toxicol (2003) 74(2):297308

a landmark 20-year prospective study by the same group (the Finnish Kuopio Ischemic Heart Disease Risk Factor Study, published in JAMA Internal Medicine, 2015) found that men who used the sauna 4-7 times per week had a 50% reduction in cardiovascular death and a 63% reduction in sudden cardiac death compared to those who used it once per week

However, for a Vitamin C derivative to work it's not enough just to be stable, they also have to be absorbed into the skin and be converted there to pure Vitamin C