Trec Nutrition - AAKG Powder. AAKG powder has been enriched with vitamin B6. L-arginine alpha-ketoglutarate (AAKG) (86.7%); acidity regulator - citric acid; aromas; beetroot juice concentrate for grapefruit flavor; anti-caking agent - silicon dioxide; sweetener - sucralose; dye for lemon and orange flavor - beta-carotene; salt; pyridoxine hydrochloride (0.02%).