Vitamins, minerals, herbs, and supplements Archive

Like most vitamins, B₁₂ can't be made by the body and must be gotten from food or supplements. A B₁₂ deficiency -- which might stem from a vegan or vegetarian diet, or problems with absorption due to weight loss surgery or aging -- can seriously harm nerves, mood, thinking, energy, and more.

Brain health supplements purport to enhance memory and improve attention and focus. But no robust scientific evidence backs up those claims. The FDA doesn't oversee supplement testing, so manufacturers do not need to prove products are effective.

Most people have heard the nutritional recommendation to eat five servings of fruit per day. But are some fruits better for you than others? Is it okay to eat dried or frozen fruit, or to drink fruit juice? Does it have to be organic?

A 2025 study suggests that very low levels of lithium in the brain might be linked to Alzheimer's disease. In mice, certain lithium supplements seemed to protect memory and the brain. But scientists don't yet know if lithium pills are safe or helpful for people.

A 2026 study found that low vitamin D levels may increase the risk of hospitalization for respiratory infections (such as colds, flu, pneumonia, and bronchitis) by as much as 33%. Sunlight, foods containing vitamin D, and supplements help maintain healthy vitamin D levels.

Elderberry syrup or tea may help reduce the duration and severity of cold and flu symptoms, but the evidence for these benefits is uncertain. Claims that elderberry products can prevent viral infections or boost immunity are unproven.

Saw palmetto is a popular "natural" choice for urinary symptoms from an enlarged prostate, but high-quality studies show little or no real benefit. Men are urged to talk with a doctor first, both to rule out serious causes and avoid misplaced hope.

As we get older, noticeable bruises are usually related to thinning skin and increasing fragility of the tiny blood vessels in the outer layer of skin. There is not much people can do about this, but they should see their doctors if bruising is excessive or becomes painful.

Taking magnesium supplements has become popular in recent years, and some evidence suggests this practice may help lower blood pressure, especially for those with high blood pressure or low magnesium levels. But a healthy diet is a better way for people to ensure they're getting enough of this essential nutrient.

A pescatarian diet pairs plant-based eating with fish and shellfish, offering key nutrients and heart- and brain-protective omega-3s. Choosing smaller, sustainably caught seafood helps limit environmental impact and mercury exposure.