This concept is known as bioavailability
After 24 h, behavioral assessments including the Open Field Test (OFT) and neurological deficit scoring were performed

Water, Glycereth-26, Methylpropanediol, Butylene Glycol, Glycerin, 1,2-Hexanediol, Niacinamide, Neopentyl Glycol Diheptanoate, Polyglyceryl-3 Methylglucose Distearate, PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether, Caprylic/Capric Triglyceride, Phenyl Trimethicone, Glyceryl Stearate, Cyclopentasiloxane, PEG-60 Hydrogenated Castor Oil, Cyclohexasiloxane, Ammonium Acryloyldimethyltaurate/VP Copolymer, C12-16 Alcohols, Glutathione(990 ppm), Palmitic Acid, Hydrogenated Lecithin, Ethylhexylglycerin, Adenosine, Diospyros Kaki Fruit Extract, Chloramine T, Sodium Bicarbonate, Sodium Carbonate, Propanediol, Sodium Hyaluronate Crosspolymer (50 ppm), Prunella Vulgaris Extract, Fucus Vesiculosus Extract, Hydrolyzed Glycosaminoglycans(30 ppm), Glycine, Sodium Hyaluronate (15 ppm), Serine, Glutamic Acid, Potassium Laurate, Benzyl Glycol, Aspartic Acid, Leucine, BHT, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Threonine, Proline, Valine, Isoleucine, Hydrolyzed Hyaluronic Acid(2.5 ppm), Histidine, Methionine, Cysteine, Ectoin, Ceramide NP, Water(Carbonated Water), Panthenol, Glyceryl Glucoside, Xylitylglucoside, Anhydroxylitol, Xylitol, Hyaluronic Acid(0.05 ppm), Hydrolyzed Collagen, Polyglyceryl-10 Laurate, Polyglyceryl-10 Stearate, Raspberry Ketone, Pantolactone, Sodium Ascorbyl Phosphate, Tripeptide-1, Hexapeptide-9, Acetyl Tetrapeptide-5, Copper Tripeptide-1, Biotin, Acetyl Tetrapeptide-2, Palmitoyl Pentapeptide-4, Hexapeptide-11, Pyridoxine, Folic Acid, Acetyl Hexapeptide-8, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-5, Tocopherol, Cyanocobalamin, Alanine/ Histidine/ Lysine Polypeptide Copper HCl, Tripeptide-32, Linoleic Acid, Riboflavin, Beta-Carotene, Inositol, Thiamine HCl, Disodium EDTA, Fragrance

Even if l-theaninecaffeine combination appears to be inferior to the currently used stimulants, based on our results, there is a potential to use the combination as an adjuvant to increase the number of stimulant-medication free days to prevent tolerance and to complement the action of currently used medications