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propionyl l carnitine mood GNC Acetyl-L-Carnitine 500mg, Supports Positive Balance, 60 Count : Health & Household Glycine propionyl-L-carnitine - Wikipedia
Description
1,2 CDSP was first described in 1975
This fine crystalline powder mixes easily in liquids or can be blended into your favorite soft foods

Inano, A, et al, Acetyl-L-carnitine permeability across the blood-brain barrier and involvement of carnitine transporter OCTN2. in Biopharmaceutics & Drug Disposition, Volume 24, Issue 8, November 2003, 357 - 365

Yes, its often taken on an empty stomach to enhance absorption, especially before a workout session

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