Vitamins & Supplements Archive

The demand for semaglutide (Wegovy, Ozempic) and similar weight-loss drugs has renewed interest in the dietary supplement berberine. Some people say berberine suppresses appetite and promotes weight loss, but no rigorous evidence supports that claim.

A 2024 study found that dietary supplements of galantamine—which is used to treat Alzheimer's symptoms—had an inaccurate amount of the plant extract listed on the label, ranging from less than 2% to 110% of the labeled quantity.

A 2024 randomized controlled trial provides more evidence that taking a daily multivitamin pill offers protection against cognitive decline. The study involved more than 5,000 people (ages 60 or older). Some took a daily multivitamin pill. Others took a placebo. After two years and tests measuring cognitive ability before and after the study period, people who took the vitamins showed slower cognitive decline than people who took a placebo. This was seen consistently in all groups of people.

While most people get enough vitamins and minerals from a regular diet, they may benefit from taking a daily multivitamin supplement. These are inexpensive, are considered safe, and may help maintain brain health.

Taking supplements that contain high levels of biotin (vitamin B₇) can lead to falsely low or falsely high results on a troponin test, a blood test used to diagnose heart attacks.

A small randomized trial in 2023 found that taking two 250-mg capsules of curcumin four times a day was as effective at relieving dyspepsia symptoms as taking one daily 20-mg dose of the heartburn medication omeprazole (Prilosec, Zegerid).

Despite statements like "promotes heart health" on the labels of fish oil supplements, multiple randomized trials show no evidence of heart-related benefits from using these products. In addition, manufacturing methods might make the products either useless or even harmful. The supplements do provide omega-3 fatty acids, but people can get these essential fats by eating two servings of fatty fish weekly or following a vegetarian diet rich in healthy oils, nuts, and seeds.