l carnitine 1 gm NOW Foods, L-Carnitine 1000 mg Usage For optimal use Project #1 Nutrition L-Carnitine: Performance
Description
Bennett et al., 2013)

Carnitine does not have an established tolerable upper intake level [1]

Effects of wuzi yanzong liquids combing with L-carnitine on oligospermia and asthenospermia

L-carnitine also naturally occurs in many animal-based foods, especially meat
