Combining peptides with complementary mechanisms is a common approach in research settings
This protocol focuses on muscle signaling pathways and nutrient utilization to help support muscle retention, strength development, and recovery following exercise

Shampoo: Orgainc Aloe Barbadensis Leaf Juice, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Cocoyl Isethionate, Glycerin, Caffeine, MSM, Biotin, Pantothenic Acid, PEPTASTEM [Citrus Aurantium Dulcis (Orange) Callus Culture Extract, Centella Asiatica (Gotu Kola) Extract, Tripeptide-5, Palmitoyl Tetrapeptide-7, Acetyl Hexapeptide-8, sh-Oligopeptide1, Allantoin] , Hydrolyzed Keratin, Vitis Vinifera Fruit Cell Extract (Grape Stem Cell), L-Methionine, Myristoyl Pentapeptide-17, Fucus Vesiculosus (Seaweed) Extract, Clitoria ternatea Linn Extract, Niacin, Simmondsia Chinensis (Jojoba) Seed Oil, Brassicamidopropyl Dimethylamine, Arthrospira Platensis, Peppermint (Mentha) Oil, Lavender (Lavendula) Oil, Sage (Salvia officinalis L.) Oil, Bergamot (Citrus Bergamia) Oil, Tocopheryl (Vitamin E), Ethoxydiglycol, Caprylyl Glycol, Xanthan Gum, Guar Hydroxypropyltrimonium Chloride, Sodium Benzoate, Potassium Sorbate, GHK-Cu (Copper Peptide), Radish ferment, Sodium Chloride, Tetrasodium Glutamate Diacetate Scalp Serum: Orgainc Aloe Barbadensis Leaf Juice, Stinging Nettle Hydrosol, Glycerin, Hydrolized Hyaluronic Acid, Pentylene Glycol, Caffeine, Glyciene, Soy Peptide, Silica, L-Methionine, Pyridoxine, Glutamic Acid, Copper Peptide(GHK-cu), Vitamin B12, Melatonin, Biotin, Centella Asiatica Extract, Acetyl Hexapeptide-8, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-5, Allantoin, Pantothenic Acid, Hydrolyzed Keratin, Saw Palmetto, L-Arginine, Vitis Vinifera Fruit Cell Extract (Grape Stem Cell ), Myristoyl Pentapeptide-17, Ethyl Ascorbic Acid, Niacin, Zinc, Lactobacillus, Bourdock Extract, Catalase, Sodium Chloride, Disodium DHA, Methylsulfonylmethane, Propanedil, Lactic Acid, Ethylhexylglycerin

Especially back then
Ferreira A and Rapoport M (2002) The synapsins: beyond the regulation of neurotransmitter release