taking acetyl l carnitine at night or morning Momentous L-Carnitine When Should You Take L-Carnitine?

Journal of Strength and Conditioning Research 28(2):514519

For cretinism in iodine-deficient areas, Se supplementation should not be promoted prior to iodine supplementation or when there is no plan for iodine supplementation, as stated by the American Thyroid Association, The differential intakes of iodine, Se, or both in different regions must be considered before any action for Se supplementation is taken (69)

A good decision framework is: vet check, diet quality, then targeted support matched to your goal

There are also other intriguing substances that can enhance sports performance

Zinc supplements can help to correct a deficiency, slow the progression of age-related macular degeneration, and have other benefits