Vegans, vegetarians, people over the age 50, anyone with stomach/bowel issues like chronic gastritis, leaky gut, IBS or celiac, and anyone who regularly takes medications such as Metformin, PPIs (used for GERD), H2 Receptor Antagonists (used for peptic ulcers), or anything that interferes with stomach acid production are actually at risk for vitamin B12 deficiency, and should supplement B12 regularly
Depending on factors like metabolism and lifestyle, the effects typically last several weeks to a month
Consider Your Health Needs When choosing between NAD and B12, think about your personal health goals
Rather than waiting for illness to strike, many patients now use Vitamin injections for immune support as a proactive strategy