You can't easily tell how much prebiotic fiber is actually in a prebiotic supplement -- ConsumerLab found it could be as little as 26% of what's labeled. Find out how much fiber ConsumerLab found in supplements, which one ConsumerLab considers best, and learn what prebiotics can and can't do, as well as their side effects.

Trying to find the best CoQ10 or ubiquinol supplement? ConsumerLab tested 20 CoQ10 and ubiquinol products. Find out which ones passed or failed our review, how they differ, and which we consider Top Picks. Also learn what CoQ10 and ubiquinol can and cannot do, and information about dosage and safety.

Resveratrol has been promoted for everything from increasing longevity to improving memory and heart health. Find out what resveratrol can and cannot actually do and find the best resveratrol supplements based on ConsumerLab's independent tests, comparisons, and quality reviews. Also learn about resveratrol dosage and potential side effects.

Be careful with canned fish! Our tests showed which tuna, salmon, sardines, and mackerel are best or worst based on amounts of beneficial omega-3s (EPA and DHA) and contaminants (mercury and arsenic). Differences among albacore (white), skipjack, and yellow tuna, as well as sockeye (red) and pink salmon, sardines, and herring kippers are revealed and explained in this new report.

On November 6, 2025, Africa Imports recalled its <em>Organic Moringa Leaf Powder</em> after some of the Moringa powder tested positive for <em>Salmonella</em>.

Detox supplements are promoted for removing toxins such as heavy metals from the body, but does research support their use and are such supplements safe?

On October 15, 2025, TBC Distribution Corporate recalled its <em>Lucky Foods Cinnamon Powder (40 g)</em> due to possible elevated lead levels.

Find the best coconut oil and MCT oil based on CL's tests and comparisons, including lab analyses of caprylic, capric, and lauric acid content by product. Learn more about coconut vs. MCT oil and their benefits and uses, such as in dieting and for the skin. Also learn about coconut and MCT oil dosage, safety, and side effects.

Find out which supplements help for varicose veins and chronic venous insufficiency, including citrus bioflavonoids and grape seed extract.

On October 7, 2025, Eagle Spice and Extract Co., Inc. recalled <em>Eagle Spice Ground Ginger (16 oz.)</em> because some of the ground ginger contains elevated levels of lead.

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.

Our independent tests of milk thistle supplements showed that not all products contained the amounts of silymarin, a key milk thistle compound, we would expect based on their labels. Explore our findings, discover our Top Pick among milk thistle supplements (extracts and a powder) and see our in-depth reviews and comparisons of milk thistle supplements from Bronson, Gaia Herbs, GNC, Jarrow Formulas, Natural Factors, Life Extension, NOW, and Swanson.

YouTube video by ConsumerLab.com

We’ve boiled down the latest research about mineral and chemical sunscreens, including product tests, to help you choose the best sunscreen (which will depend on whether you expect to be in or out of the water). We also list popular sunscreens that have, or have not, been found to contain cancer-causing compounds (benzene and benzophenone).

Find the best muscle and workout supplements with creatine and branched-chain amino acids (BCAAs), tests for contamination with dicyandiamide, evidence for increasing muscle strength and endurance, improving your workout, dosage, safety, side effects and more. Find out which ones passed or failed our tests and why.

On November 8, 2025, the FDA added <em>Venzu Traders Cinnamon Powder</em> to its list of 19 brands of ground cinnamon&nbsp;found to contain elevated levels of lead. Consumers should not consume this product and should discard it immediately.

YouTube video by ConsumerLab.com

Find the best collagen supplement for wrinkles and joint pain based on independent testing and review by ConsumerLab.com. We analyzed and compared popular collagen hydrolysates providing collagen peptides from ingredients such as Verisol, and we reviewed the clinical research behind them. Also learn about collagen dosage and safety, and about UC-II cartilage.

Read our reviews of B vitamin supplements to find the best B complex, niacin, B-6, B-12, biotin, thiamin and folate, including "methyl" forms such as methylfolate. Get information about dosage, safety, and B vitamins for energy, memory, depression and more.

Learn more about coffee and caffeine, its safety, if it's good for you, how much coffee is too much and its impact on your heart.

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

Learn how to find the best menopause supplements, including soy and red clover isoflavones, black cohosh and progesterone creams. Find out whether menopause supplements help for hot flashes, night sweats, vaginal dryness and more, safety, side effects and drug interactions. Understand what you are taking before you buy.

Learn about the pros and cons of using sugar substitutes and artificial sweeteners in place of table sugar. Sweeteners discussed include stevia, monk fruit, and other high-intensity sweeteners; xylitol, erythritol, allulose and other low-calorie sweeteners; and agave syrup, black sugar, coconut sugar, honey, molasses and other sugar alternatives.

Which lavender and tea tree essential oils are authentic and pure? ConsumerLab purchased and tested popular brands of lavender and tea tree oil to find out and identify it Top Picks for quality and value. The report also explains what essential oils can and cannot do, how to use them, as well as safety concerns and cautions.

Some supplements may provide modest benefit for back pain, while others don't seem to work or haven't been evaluated for this use. Find out if supplements like collagen, devil's claw, PEA, pregnenolone, white willow bark, and others help.