Can butyrate supplements improve gut health or help reduce symptoms of irritable bowel syndrome (IBS) or Crohn's disease? Find out what the clinical evidence shows, learn about the different forms of butyrate, including sodium butyrate, calcium-magnesium butyrate, and tributyrate, and get details about products such as BodyBio Sodium Butyrate and Healus Complete Biotic Tributyrin, dosage, safety and cost.

Dietary supplements are often explored as alternative options or add-on interventions for people with ADHD. Learn which, if any, have shown possible benefit and which don’t seem to help or may interfere with ADHD medication.

Find the best calcium supplements for bone health based on our tests and comparisons. See which products failed tests and which are our Top Picks based on quality, dosage, and cost. Also learn the best sources of calcium, safe dosage, and side effects of calcium.

Find the best N-acetyl cysteine (NAC) supplement based on CL's tests and learn more about NAC's purported use in supporting the liver and immune system and in treating conditions such as chronic bronchitis, flu, and colds. Also learn about NAC dosage, safety, side effects and potential drug interactions.

DAO supplement info for histamine intolerance, including diamine oxidase safety, evidence from clinical studies, and dosage.

Inositol hexaphosphate (IP6): Find out if IP6 (also known as phytic acid) can prevent or treat cancer. Clinical evidence, dosage, safety and how IP6 differs from myo-inositol. Consumerlab.com's answer explains.

Trying to find the best iron supplement? See which iron supplements passed ConsumerLab.com's independent tests and are best for specific needs, including moderate-dose, high-dose, pills, liquids, and chews. Plus, learn about taking iron to treat iron deficiency anemia and unexplained fatigue, the different forms of iron, and how to avoid stomach upset and constipation when taking iron.

See the top-rated multivitamins from ConsumerLab's independent testing. Comparison of popular multivitamin/multimineral supplements for women, men, children, and seniors, people with diabetes, prenatal, and multis for dogs and cats. Also find out which multivitamins failed testing due to problems.

See our tests and comparisons of vitamin D supplements and find out which we consider the best to use -- including those with calcium. Also learn how to choose the right dose and form of vitamin D, how to take vitamin D to get the most from it, what vitamin D does and doesn't do, and how much is "too much" vitamin D.

Seaweed snacks and dried seaweeds can be dangerous due to excessive iodine and heavy metal contamination, particularly with lead and cadmium, as our recent tests revealed. See which seaweed snacks rated best and which could not be approved.

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Find out which supplements may help reduce symptoms of autism, including multivitamins, probiotics, and melatonin.

If you want to find the best green tea high in antioxidants such as EGCG, you'll want to see our laboratory findings. We discovered a shocking range of EGCG, from 8 mg to more than 450 mg per serving! See results for popular brands of green tea as tea bags, loose leaf tea, bottled tea, ceremonial matcha powder, and green tea extract supplements. Also see how much caffeine we found, compare prices, and learn what conditions green tea is good for and about potential side effects.

Dimethyl sulfoxide (DMSO) is a colorless liquid promoted for osteoarthritis, interstitial cystitis, tennis elbow, rotator cuff tendonitis, wound healing, and many other conditions. Find out if it works and if it's safe.

Golden State Medical Supply issued a recall of multiple lots of prescription-only <em>NIACIN Extended-Release Tablets (1,000 mg)</em> because the tablets failed dissolution specifications. This can indicate that the tablets did not disintegrate properly, completely, or at the expected rate.