A peptide that is poorly synthesized can contain residual solvents, failed sequences, or other contaminants
Tantibhadrasapa A, Li S, Buddhasiri S, Sukjoi C, Mongkolkarvin P, Boonpan P, Wongpalee SP, Paenkaew P, Sutheeworapong S, Nakphaichit M, Nitisinprasert S, Hsieh MH, Thiennimitr P (2024) Probiotic Limosilactobacillus reuteri KUB-AC5 decreases urothelial cell invasion and enhances macrophage killing of uropathogenic Escherichia coli in vitro study
If you had b12 deficiency for a long time it may take months before you see a regression of your symptoms
Cyclic vomiting syndrome: an important differential diagnosis of cannabinoid hyperemesis syndrome