Vitamin D - Mayo Clinic Vitamin D is a nutrient the body needs, along with calcium, to build bones and keep them healthy The body can absorb calcium only if it has enough vitamin D Calcium is a major part of bones Vitamin D also has many other uses in the body It supports immune health and helps keep muscles and brain cells working
Vitamin B-12 - Mayo Clinic Know the causes of a vitamin B-12 deficiency and when use of this supplement is recommended
Vitamin C - Mayo Clinic Vitamin C is an essential nutrient found in foods and available as a supplement you take by mouth Learn about its potential benefits and the causes of vitamin C deficiency
Biotin (oral route) - Side effects dosage - Mayo Clinic The daily amount of biotin needed is defined in several different ways For U S — Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons RDAs for a given nutrient may vary depending on a person's age, sex, and physical condition (e g , pregnancy)
Too much vitamin C: Is it harmful? - Mayo Clinic Vitamin C is an essential nutrient, but you can get too much of it If you're an adult, limit yourself to no more than 2,000 milligrams (mg) of vitamin C a day The recommended upper limit for children varies by age Getting too much vitamin C from food isn't likely to be harmful But large doses of vitamin C supplements can cause: