Find the best products with instant access to our latest tests & reviews of over 1,400 health products.
Save money by finding high-quality products at lower cost.
Stay safe with the latest clinical findings, warnings, and expert answers.
Suggest products to test.
Stay informed with our e-newsletter.
Among popular urolithin A supplements, 60% contained almost no urolithin A, according to recent tests by a separate group. For results by product, see our article about Urolithin A.
Was a popular magnesium gummy found to contain lead or other toxic heavy metals when recently tested by a separate group? Find out in our Magnesium Supplements Review, which includes our Top Picks among magnesium supplements.
Many "zero-calorie" stevia sweeteners include fillers that can add as many calories per gram as sugar – although less sweetener is needed than sugar, reducing overall calories. Learn which ingredients are added to products such as BetterStevia, Sucress, and products from NuNaturals in our article about sweeteners.
Ashwagandha use has been associated with liver injury, and preliminary research suggests that a certain form of ashwagandha is more likely to cause this adverse effect than others. Get the details in the Concerns and Cautions section of our Ashwagandha Supplements Review, which includes our Top Picks.
Can methylene blue help treat cancer or reduce side effects of chemotherapy? Find out in our article about methylene blue.
Some brands of dental floss, including Oral-B Glide, may contain potentially toxic chemicals known as PFAS (polyfluoroalkyl substances). Get the details, and learn which floss and pick products are our Top Picks.
TA-65 Astragalus Extract is promoted to increase telomere length. Find out if there is evidence for this, if this increases lifespan or longevity, plus safety, side effects and cost.
Palmitoylethanolamide (PEA) is commonly promoted for its anti-inflammatory and pain-relieving effects. Find out if it works.
Find out which supplements can help lower or control blood sugar. Supplements including turmeric/curcumin, fiber, cinnamon, and ginseng are believed to help lower blood sugar.
IBS supplements may help reduce irritable bowel symptoms such as pain, diarrhea and constipation. Supplements include probiotics, melatonin, and flaxseed.
Among popular urolithin A supplements, 60% contained almost no urolithin A, according to recent tests by a separate group. For results by product, see our article about Urolithin A.
Was a popular magnesium gummy found to contain lead or other toxic heavy metals when recently tested by a separate group? Find out in our Magnesium Supplements Review, which includes our Top Picks among magnesium supplements.
Many "zero-calorie" stevia sweeteners include fillers that can add as many calories per gram as sugar – although less sweetener is needed than sugar, reducing overall calories. Learn which ingredients are added to products such as BetterStevia, Sucress, and products from NuNaturals in our article about sweeteners.
Ashwagandha use has been associated with liver injury, and preliminary research suggests that a certain form of ashwagandha is more likely to cause this adverse effect than others. Get the details in the Concerns and Cautions section of our Ashwagandha Supplements Review, which includes our Top Picks.
Can methylene blue help treat cancer or reduce side effects of chemotherapy? Find out in our article about methylene blue.
Some brands of dental floss, including Oral-B Glide, may contain potentially toxic chemicals known as PFAS (polyfluoroalkyl substances). Get the details, and learn which floss and pick products are our Top Picks.
TA-65 Astragalus Extract is promoted to increase telomere length. Find out if there is evidence for this, if this increases lifespan or longevity, plus safety, side effects and cost.
Palmitoylethanolamide (PEA) is commonly promoted for its anti-inflammatory and pain-relieving effects. Find out if it works.
Find out which supplements can help lower or control blood sugar. Supplements including turmeric/curcumin, fiber, cinnamon, and ginseng are believed to help lower blood sugar.
IBS supplements may help reduce irritable bowel symptoms such as pain, diarrhea and constipation. Supplements include probiotics, melatonin, and flaxseed.
September 12, 2025
September 12, 2025
September 12, 2025
September 09, 2025
September 09, 2025
September 08, 2025
August 20, 2025
August 07, 2025
August 05, 2025
July 24, 2025
September 08, 2025
August 20, 2025
August 07, 2025
August 05, 2025
July 24, 2025