l-carnitine claims NOW Foods: Liquid 3000mg, 16 oz (2 Pack) : Health & Household Acetyl L-Carnitine

Studies conducted on a group of children affected by ASD revealed a reduction of the NAA concentrations (Friedman et al., 2003) (Figure 3)

While more clinical research is needed to see if they specifically boost each other's absorption, the anecdotal evidence from athletes and military personnel suggests that this "stack" is a reliable way to support performance without the need for heavy stimulants

Talebali H, Farzinpour A (2006) Effect of different levels of perlite on performance of broiler chicks International journal of poultry science 5:432-435 Tomas FM, Pym RA, McMurtry JP, Francis GL (1998) Insulin-like growth factor (IGF)-I but not IGF-II promotes lean growth and feed efficiency in broiler chickens General and comparative endocrinology 110:262275 Valceschini E Poultry meat trends and consumer attitudes

McCann, M.R., George de la Rosa, M.V., Rosania, G.R