For in vitro cell culture: Use sterile PBS (phosphate-buffered saline) to prepare a stock solution, then dilute into your cell culture medium
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So, regardless of how much (or how little) you have to take daily, there are solutions available for you
These findings (equal damaging effect of cysteamine, equal protection of NaBPC157 and reference agents in gastrectomized rats with intact stomach and without stomach, the damaging or protective effect is not related to gastric acid secretion) are indicative of a cytoprotective effect
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Sources NIH Office of Dietary Supplements, Vitamin B12 Fact Sheet NIH Office of Dietary Supplements, Choline Fact Sheet MedlinePlus, Cyanocobalamin Injection Mayo Clinic, Vitamin B12 Injections and Weight Loss NCBI Bookshelf, Essential Amino Acids PubMed, Inositol Phosphate Signaling Network The American Journal of Clinical Nutrition, Lipotropic Agents and Lipid Transport