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Proton pump inhibitors (acid blockers) and over-the-counter non-steroidal anti-inflammatory agents can change the environment of the GI tract predisposing to nutrient deficiencies Unfortunately, that isnt an exhaustive list, but it does give you a pretty good idea of why you should be concerned about your vitamin B12 levels
FAQs Why do Glutathione levels decline with age
Global, regional, and national deaths, prevalence, disability-adjusted life years, and years lived with disability for chronic obstructive pulmonary disease and asthma, 19902015: a systematic analysis for the Global Burden of Disease Study 2015
Fun fact (or horrifying fact, depending on how you look at it): The toxic byproducts in most seed oils are so damaging that consuming fried foods made with them has been compared to smoking cigarettes
Relative contraindications (metformin use, proton pump inhibitors) require monitoring