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An essential amino acid that's also a key building block of collagen and elastin. When taken orally, it helps the digestive and intestinal tracts function more smoothly and also helps the absorption of nutrients. As for skincare, it is not clear what it does other than being a skin hydrator

Products with Threonine

Peter Thomas Roth Unisex Neuroliquid Volufill Youth Serum Mary Kay Lash & Brow Building Serum Peter Thomas Roth Peptide 21 Amino Acid Exfoliating Peel Pads Comme Deux Serum Booster Pore Refining & Mattifying Leaders Mediu Amino Mousture Mask Dermexcel Acne Repair Serum Mira Dror Suero Hidrasystem Leaders Amino Lifting Mask Minon Amino Moist Mask Murad Essential-C Toner Pacifica Cosmic Hemp Balancing Face Wash H20+ Hydration Oasis Refreshing Gel Moisturizer Olay Quench Daily Body Lotion Swissvita Skin Regenerating Vital Essence The Ordinary Amino Acids + B5 Ausceuticals Peptide Moisturiser Brickell Men's Products Daily Strengthening Shampoo For Men Eaoron Hyaluronic Cleanser Kikumasamune Skin Care Essence Neutrogena Hydro Boost Aqua Pearls Serum (Germany) Neutrogena Hydro Boost Supercharged Booster The Ordinary Marine Hyaluronics bioearth Siero Viso Illuminante Antiossidante Dearskin Vitamin C Dear Serum Isntree Sensitive Balancing Thermal Toner Mecca Cosmetica Hydrating Mist Murad Eye Lift Firming Treatment™ Revolution Skincare Overnight Blemish Lotion Skin Functional Exfoliating Facial 2 30% Amino Hydroxy Complex Esho Drench H2O+ Hydration Oasis Moisture Replenishing Serum La Prairie Anti-Aging Rapid Response Booster Le Mieux Iso Cell Recovery Solution Le Mieux Iso Silver Recovery Solution Le Mieux O2 Silver Calming Gel SiO Energy Serum Rapid Moisture Drop Serum The Ordinary Natural Moisturizing Factors + Ha Anastasia Beverly Hills Eye Primer Aqulabo Mask Boosting Jelly Mist Brickell Men's Products Reviving Day Serum For Men Celimax The Real Noni Moisture Balancing Toner Circadia Myo-Cyte Plus Anti Wrinkle Serum Equal Beauty Super Serum Hydrantioxidant™ QRxLabs Peptide Complex Serum 2Sol Cica Youth Toner Abnomaly Petrowhat? Bali Abnomaly Petrowhat? Baobab Abnomaly Petrowhat? Milk Abnomaly Petrowhat? Rio Eva Naturals Peptide Complex Serum