Just because supplements are safe in moderation doesn't mean more is better. Combining several supplements or taking higher doses than recommended can increase the risk of harm. Supplements can pose risks even in otherwise healthy people, and the effects of many supplements have not been tested on children, pregnant women, and other groups. It's important to talk to your healthcare provider if you're thinking about taking dietary supplements.
People with an inherited condition called hemochromatosis should be careful with iron supplements, since hemochromatosis causes toxic levels of iron to build up in their bodies. The USPSTF stopped making recommendations for the use of multivitamins and individual or combined nutrient supplements (other than beta-carotene or vitamin E) for the prevention of cardiovascular disease and cancer due to lack of evidence. Taking 400 micrograms of folic acid a day, whether from supplements or from fortified foods, is important for all women of childbearing age. When it comes to supplements, it's important to remember that more isn't necessarily better.
Overdoses can occur if you take too many supplements or take them in high doses. Symptoms vary depending on the nutrient and the amount taken, and may only show up on blood tests. If you're taking multiple supplements, make sure that the total recommended daily allowance percentages don't exceed 100 percent. Fish oil is one supplement that has scientific evidence to support its use.
It has anti-inflammatory and antioxidant properties that help prevent cardiovascular disease and cancer. However, it's important to remember that just because a product is labeled as a dietary supplement doesn't guarantee that it will work or be safe. It's important to talk to your healthcare provider before taking any dietary supplements, especially if you have certain health conditions or are pregnant or breastfeeding. Supplements can be beneficial when taken in moderation, but it's important to remember that more isn't necessarily better.