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Acetyl L CarnitineThe body makes carnitine from amino acids lysine and methionine, but people may suffer deficiencies due to, for example, high-fat diets. From anti aging point of view, there are several interesting studies that have been done on carnitine. In several studies, people who were taking L-carnitine supplements had a significant lowering of their total cholesterol and triglycerides, and an increase in their HDL cholesterol levels. Some studies have suggested that one form of carnitine, the L-acetylcarnitine (LAC) form, may delay the progression of Alzheimer's disease, relieve depression related to senility and other forms of dementia, and improve memory in the elderly. Unfortunately, results from other studies have been conflicting in this regard. Low sperm counts have been linked in research to low carnitine levels in men. There are several studies that suggest L-carnitine supplementation may increase sperm count and mobility. Acetyl L Carnitine - StudiesArsenian, MA. 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