B Vitamin Supplements
Although rare, severe and life-threatening allergic reactions to folic acid from supplements have been reported. Get the details about this, as well as risks from too much folic acid, in the Folic Acid section of our B Vitamin Supplements Review, which includes our Top Picks for folic acid and folate, and other B vitamins.
Did supplementation with vitamin B-6 reduce antibiotic-related side effects in people treated for H. pylori infection (a common cause of peptic ulcers)? Find out in our B Vitamin Supplements Review, which includes our Top Picks for vitamin B-6 and other B vitamins.
Also see: 8 Supplements That May Help Treat Peptic Ulcers – And Some to Avoid
Low levels of B-12 have been linked with tinnitus (ringing in the ears) and other issues, but does taking B-12 reduce tinnitus? Find out in the B-12 section of our B Vitamin Supplements Review, which includes our Top Picks for B-12 and other B vitamins.
Also see our article about supplements that may improve or worsen tinnitus.
Walgreens has rebranded its "Finest Nutrition" supplements. Get the details in our B Vitamins Review.
High doses of biotin from supplements can interfere with a wide range of laboratory and at-home tests, including those for pregnancy, doping, COVID, and heart attacks. Get the details in the Biotin section of our B Vitamin Supplements Review.
Also see: Which vitamins and supplements should be stopped before getting blood work and laboratory tests?
High doses of vitamin B-6 from supplements may cause adverse effects, even when doses do not exceed the established tolerable limit for B-6, as highlighted by a recently reported case. Learn about getting too much or too little vitamin B-6 in our B Vitamins Supplements Review, which includes our Top Picks among B-6 and other B vitamin supplements.
Is thiamin tetrahydrofurfuryl disulfide (TTFD), a derivative of thiamin, absorbed and used by the body better than thiamin itself? Find out, and learn about possible health effects, in the Thiamin (B-1) section of our B Vitamin Supplements Review.
Vitamin B-12 deficiency can cause a wide range of adverse effects affecting the nervous system, cognition, blood and blood pressure, and more. Learn about the symptoms and recent cases, and find out who is most likely to be deficient in our B Vitamin Supplements Review.
Also see our article: Top 8 Supplements for Vegetarians and Vegans.
Biotin has been promoted for reducing wrinkles, but does clinical research support this? Find out in the Biotin (B-7) section of our B Vitamin Supplements Review, which also discusses the evidence for biotin for treating brittle nails and hair loss.
Also, see our CL Answer about supplements for reducing wrinkles and tightening the skin.
Vitamin B-6 deficiency can cause nerve pain and weakness, even resulting in inability to walk, as shown in a recent case. However, getting too much B-6 from supplements can also cause these symptoms. Find out how much B6 you should be getting in the Vitamin B-6 section of our B Vitamins Supplements Review.
For information about supplements that may help with other forms of nerve pain, see our answer to the question: Do any supplements, like Nervive, help with nerve pain, like sciatica or diabetic neuropathy?
Can taking folic acid (vitamin B-9) reduce the risk of self-harm and suicide? Find out what a recent study found in the Depression section of our B Vitamin Supplements Review.
A baby was recently born with severe riboflavin deficiency due to a lack of riboflavin in the mother's vegan diet and supplements. Learn more about riboflavin requirements in our B Vitamin Supplements Review.
If you take metformin for diabetes, be aware that you are at risk for vitamin B-12 deficiency. See the latest guidelines to monitor for this in the B-12 section of our B Vitamin Supplements Review.
Beans and peas are great dietary sources of folate (vitamin B-9), but the right preparation can more than double their folate levels, according to a recent study. Find out how in the Folate section of our B Vitamin Supplements Review.
Also see our table of Foods Containing B Vitamins to find out other foods that are good sources of folate and other B vitamins.
Can taking high-dose vitamin B-6 or B-12 improve self-reported anxiety? Find out what a recent study showed in the Anxiety section of our B Vitamin Supplements Review.
Also see our answer to the question: What are the best supplements for depression and anxiety?
Can vitamin B-5 supplementation improve symptoms of rheumatoid arthritis or osteoarthritis? Find out what research suggests in the B-5 (Pantothenic Acid) section of our B Vitamins Supplements Review.
Many people who have had bariatric (stomach-reducing) surgery need to supplement with B-12 and other B vitamins. Find out what happened to such a person who discontinued supplementation in the Vitamin B-12 section of our B Vitamin Supplements Review.
Taking very high doses of niacin can cause symptoms resembling anaphylactic shock, as was recently reported. Get the details in the Niacin section of our B Vitamin Supplements Review.
B-12 deficiency can cause severe symptoms, even when B-12 levels in the blood are not low, as shown in a recent case. Find out why, and which tests can help, in the B-12 section of our B Vitamin Supplements Review.
People with a certain MTHFR gene mutation (C677T) may be more likely to develop B vitamin deficiencies. But what about those with a less common MTHFR mutation – A1298C? Find out what research suggests in the MTHFR gene mutation and B vitamin metabolism section of our B Vitamin Supplements Review.
Raising lower blood levels of vitamin B-12 may help with nighttime leg cramps according to some reports. Get the details in the B-12 section of our B Vitamin Supplements Review.
For information about other supplements that may help, see our answer to the question: Do any supplements, foods, or oils help reduce muscle pain, muscle cramps, or nighttime leg cramps?
Correcting B-12 deficiency may improve cognition in people with dementia, according to a recent study and case reports. Get the details in the Memory, Cognition, and Alzheimer’s Disease section of our B Vitamin Supplements Review.
Also see our answer to the question: Do supplements help with Parkinson's disease treatment or prevention?
Also see our Top Pick among prenatal vitamins, which provides adequate (but not too much) folic acid, in our Multivitamin and Multiminerals Supplements Review.
CL has long warned that energy drinks and shots often contain large amounts of B6 and other B vitamins.
For more information, see ConsumerLab's answer to the question, I take omeprazole (Prilosec), a proton pump inhibitor, to reduce stomach acid. Are there supplements I should avoid, or be taking, due to this drug?.
For more details, see the updated reviews of B Vitamin Supplements & Energy Drinks and Protein Powders, as some of these products contain L-carnitine. The Acetyl-L-Carnitine Supplements review has also been updated because acetyl-L-carnitine is chemically similar to L-carnitine, suggesting a potential concern.