can acetyl-l-carnitine cause kidney stones for Heart, Diabetes & Health L-Carnitine: Benefits, side effects, and
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Randomized, phase III study comparing osmoprotective carboxymethylcellulose with sodium hyaluronate in dry eye disease

"L-carnitine and weight loss: meta-analysis." Obes Rev 2016;17:970-6

Healthy Benefits of Acetyl L-Carnitine Cognitive Enhancement : When comparing l carnitine tartrate vs acetyl l carnitine for cognitive function, acetyl L-carnitine often shows superior effects

The intravenous LD50 of levocarnitine in rats is 5.4 g/kg and the oral LD50 of levocarnitine in mice is 19.2 g/kg

Supplemental carnitine and exercise