This restriction is due to the rigid nature of the amide (peptide) bond
Creating a Hostile Environment: You are making the solution an even more inhospitable place for bacteria, adding a powerful physical deterrent (cold) to the chemical one (benzyl alcohol)
10.1016/j.biopha.2022.113273 123 ZhangZ.GarzottoM.DavisE
Organize and Protect Your Vials with This Durable 3D Printed Storage Case Featuring 3 Secure Slots for 30ml Vials, Perfect for Home, Travel, and Refrigerated Storage!

Ingredients : Water, Centella Asiatica Extract (29.2%), Butylene Glycol, Propanediol, Niacinamide (20,000ppm), Glycerin, Diethoxyethyl Succinate, Panthenol, Sodium Hyaluronate, Allantoin, Glutathione (1,000ppm), Sodium Polyacryloyldimethyl Taurate, Glyceryl Acrylate/Acrylic Acid Copolymer, Nelumbo Nucifera Extract, Artemisia Annua Extract, Oryza Sativa (Rice) Extract, Saccharomyces Ferment, Solanum Melongena (Eggplant) Fruit Extract, Melaleuca Alternifolia (Tea Tree) Leaf Extract, Hydrolyzed Collagen, Squalane, Beta-Glucan, Dipropylene Glycol, Hippophae Rhamnoides Fruit Extract, Adenosine, Madecassic Acid, Asiaticoside, Asiatic Acid, Caprylic/Capric Triglyceride, Hydrogenated Lecithin, Glyceryl Stearate, Cholesterol, Styrene/Acrylates Copolymer, Cellulose Gum, Xanthan Gum, Inulin, Cellulose, Glucose, Fructose, Citric Acid, Disodium EDTA, Hydroxyacetophenone, 1,2-Hexanediol, Ethylhexylglycerin, Dipotassium Glycyrrhizate, Sodium Citrate