As published in the Annals of Internal Medicine the analysis also found that most of the supplements or diets weren’t associated with any harm, and only showed possible health benefits for some people from a low salt diet, omega-3 fatty acid supplements, and possibly folic acid supplements; supplements combining calcium and vitamin D were found to be linked to a slightly increased risk of stroke, according to the researchers.
52% of Americans take at least one daily vitamin or other dietary nutritional supplement according to the CDC; and as a nation $31 billion is spent on these over the counter products. This study adds to the increasing body of evidence that have found no health benefits from taking most of these products.
https://worldhealth.net/news/not-all-su ... lay-death/
Another issue is that even if a specific supplement does not increase lifespan it may still improve quality of life and extend healthspan (e.g. lutein and cognitive decline).