US$ 25.66
purest l carnitine NOW Foods Supplements, L-Carnitine 1,000 mg, Form, Carnipure, Amino Acid, Fitness Support, Tablets, 150 Count : Health & Household L-Carnitine fumarate
Description
doi: 10.1016/j.foodres.2021.110822 92

They found an association between higher levels of activity and a 25% reduced risk of low OPP

(2007) Reduced carnitine level causes death from hypoglycemia: possible involvement of suppression of hypothalamic orexin expression during weaning period

It's also gluten free, soy free, dairy free and no added sugars
