ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

About ConsumerLab.com

Which supplements and lifestyle changes improve sleep, and which cause insomnia?

Find out which vitamins may help you sleep and learn if any vitamins or supplements can cause insomnia.

What are the symptoms of vitamin B6 deficiency?

Learn more about symptoms of B6 deficiency, who is more likely to be deficient in vitamin B6 as well as how much vitamin B6 you should be getting. ConsumerLab.com's answer explains.

Woman in White Tee Holding Wrist

Can I trust lab reports and Certificates of Analysis provided by supplement manufacturers?

Lab reports and Certificates of Analysis are provided by supplement manufacturers, but sometimes include incorrect testing and "dry labbing". ConsumerLab.com's answer explains.

Can I trust lab reports provided by supplement manufacturers?

What are the side effects of red yeast rice?

Find out which side effects can be caused by red yeast rice supplements that are taken to lower cholesterol levels. ConsumerLab.com's answer explains.

Red Yeast Rice Side Effects

Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.

Info on Sugar Bear Hair vitamins. Do they make hair shine, nails stronger and help hair and nails grow? ConsumerLab.com's answer explains.

Do Sugar Bear Vitamins Work? -- bottle of Sugar Bear vitamins

Why is iron not in many multivitamins? How can I find one that does contain iron?

Iron in multivitamins - Find out why many multivitamins do not contain iron, and how to find a quality multivitamin that does contain iron.

Why is iron not in many multivitamins? -- Multivitamin nutrition facts

How can I tell if my fish oil supplement is rancid (oxidized) or spoiled? And if it is spoiled, is it still safe to take?

Find out how to tell if your fish oil supplement is rancid (oxidized) or spoiled and how to store fish supplements to keep them fresh. ConsumerLab.com's answer explains.

Fish Oil

How concerned should I be about glyphosate in foods and supplements?

Find out if you should be concerned about glyphosate in foods and supplements. ConsumerLab.com's answer explains.

Glyphosate in Food -- bowl of oat o's cereal

Does taking a laxative interfere with the absorption of vitamins or minerals?

Information on laxative interactions with other medications and supplements such as Maalox, antibiotics, and statins and diabetes medications.

Laxatives and vitamin and mineral absorption

What does "%DV" (Daily Value) mean on a supplement label, how does it differ from RDAs, and should anyone take more than the DV for a nutrient?

Find out the difference between RDAs (Recommended Daily Allowances) and DVs (Daily Values) for vitamins and minerals, and learn whether certain groups of people should take more than the 100% DVs for vitamins and minerals.

Multivitamin Daily Value Percentages Close Up
1 2 22 23 24 25 26 49 50