Correct Relevant Nutrient Deficiencies Vitamin B6, B12, folate, riboflavin, choline, betaine, magnesium, zinc, selenium, glycine and cysteine availability may influence methylation, antioxidant protection and sulfur metabolism
Results The interaction test yielded no significant differences between the effects of the four daily oral maintenance dosages of L-carnitine (i.e., 2 g, 3 g, 4 g, and 6 g) on all-cause mortality (risk ratio [RR] = 0.77, 95% CI [0.57-1.03], P = 0.08) with a statistically insignificant trend favoring the 3 g dose (RR = 0.48) over the lower 2 g dose (RR = 0.62), which was favored over the higher 4 g and 6 g doses (RR = 0.78, 0.78)
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There are a couple of symptoms that may indicate you have a deficiency
The supernatants were transferred to clean tubes, then held on ice until the end of the experiment, and stored at 4C afterward until further processing