Vitamin C does a lot more than keep colds at bay. This nutrient strengthens your immune system, fights off cell damage with its antioxidant effects, and even helps your body make collagen—the protein that keeps your skin and bones strong. It can help you manage several ailments.
Vitamin C doesn’t prevent colds in everyone, but research suggests it may be of particular benefit to people under heavy physical stress, like athletes. A daily supplement of 250 milligrams to 1 gram of vitamin C may reduce the risk of colds by half in this group.
Taking daily vitamin C as a preventive measure can help you recover quicker when you do catch a cold. Research shows it can reduce cold length by 8% in adults and 14% in children if taken before the onset of symptoms.
When you have a wound from an injury, surgery, or ulcer, your body works to repair the damaged tissue. Vitamin C supports this healing process by helping your body produce collagen, a protein that helps rebuild tissue. It also helps form new blood vessels and reduces inflammation.
Studies suggest vitamin C can help wounds heal faster. For example, some research shows that taking 600 milligrams of vitamin C daily after a tooth extraction led to significantly smaller wounds within one week. Participants also reported less pain.
Case reports also suggest that a daily dose of 1,000 milligrams of vitamin C may improve healing in people with slow-healing surgical wounds and skin ulcers. However, these are individual cases, not large clinical trials, and more evidence is needed.
Feeling tired, weak, and short of breath could be signs of iron deficiency anemia. This condition can develop when your body lacks the iron it needs to produce hemoglobin. Hemoglobin is the protein in red blood cells that carries oxygen.
Vitamin C helps your body absorb iron from plant-based foods and supplements. It works by converting iron into a form that your intestines can absorb more easily.
A 2024 review of multiple studies found that adding vitamin C to iron supplements slightly increased the levels of hemoglobin and ferritin—and iron-storing protein—in the body.
Having high blood pressure (hypertension) means the force of blood against your artery walls is consistently too high. Over time, this can damage your blood vessels and increase your risk of heart disease and stroke.
Vitamin C may help lower high blood pressure by protecting and relaxing your blood vessels. It reduces damage from free radicals and increases nitric oxide, which helps blood vessels widen, allowing blood to flow more easily.
Vitamin C may help protect your heart by reducing inflammation, supporting healthy blood vessels, and improving cholesterol levels. As an antioxidant, it fights free radicals that damage artery walls and contribute to fatty plaque buildup.
Higher vitamin C levels are linked to better blood vessel function and a lower risk of stroke.
By keeping vessels flexible and reducing oxidative stress, vitamin C helps improve circulation and may slow the processes that lead to heart disease.
Gout is a painful form of arthritis that happens when uric acid builds up in your blood. The excess uric acid forms sharp crystals in your joints, causing sudden, severe pain and swelling.
Vitamin C may help lower the risk of gout by reducing uric acid levels. Studies show that taking around 500 milligrams daily can modestly decrease the chance of developing gout by around 12%. More research is needed to understand how vitamin C may affect people who already have gout.
