does l carnitine speed up metabolism increases endurance performance? Supplementation of l-carnitine in athletes:

Track every single vial from source to patient and beyond

Research has explored NAD+ precursors for supporting cellular energy.* Studies have evaluated glutathione for antioxidant defense.* Human trials have investigated these ingredients for vitality support.* Suggested Use Take 2 capsules daily, or as directed by your healthcare professional.* Product Specifications Serving Size 2 Capsules Servings Per Container 30 Active Blend Bioenergy Ribose - RiaGev-WS + Reduced L-Glutathione Other Ingredients Hypromellose (capsule), microcrystalline cellulose, etc

Merriam GR, Barness S, Buchner D, et al

In some cases, this nutrient is included in a multivitamin or other dietary supplement containing multiple nutrients