is 2000mg l carnitine safe Fast&Up L-Carnitine Effervescent Tablets | Premium Carnipure® Supplement Can L-Carnitine Support Energy Levels
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This could be due to the significant increase in NADH levels during maximal exercise and submaximal isometric contractions (Sahlin, 1985

In humans, 75% of L-carnitine derives from diet, while the 25% endogenous part is synthesized from the essential amino acids, lysine, and methionine in the kidneys and liver (9)

TMA is then further broken down by bacteria in the body to produce trimethylamine-N-oxide (TMAO)

Carnitine supplements may also aid in treating the autonomic neuropathy caused by diabetes
