7 Scientific Health Benefits of Vitamin C
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Vitamin C (L-ascorbic acid) is one of the most talked about vitamins. The nutrient gets special buzz for its immune-boosting potential. But touting vitamin C’s ability to shorten the common cold only scratches the surface of its role in the body.
This antioxidant isn’t naturally made by the body, so it’s crucial to obtain it from vitamin C–rich foods, according to the Mayo Clinic.
“Vitamin C can be found in a variety of foods, including red and green bell peppers, citrus fruits, kiwi, broccoli, tomatoes, and Brussels sprouts,” says Tamar Samuels, RDN, a cofounder of Culina Health in New York City.
Adult women need 75 milligrams (mg) of vitamin C per day, and adult men need 90 mg, according to the National Institutes of Health’s (NIH) Office of Dietary Supplements. Most Americans typically source enough of the nutrient through diet alone.
RELATED: Am I Getting Enough Vitamin C?
Read on to learn about seven major health benefits of vitamin C.
1. Vitamin C Stimulates Collagen Synthesis
The body depends on vitamin C for the synthesis of collagen, which is found in connective tissue around the body, according to the NIH. “Adequate vitamin C levels are essential for the production of collagen,” Samuels says. “Collagen is the most abundant protein in the body and plays a critical role in connective tissues like those found in our organs and of course our hair, skin, and nails.”
You may know collagen as the skin’s anti-aging savior, as some health and beauty experts portray it. One study found that topically applying vitamin C to the skin led to increased collagen production and younger-looking skin. The increased collagen synthesis also means vitamin C helps wounds heal, according to Oregon State University.
2. Vitamin C Combined With Iron Leads to Better Absorption
Another plus to vitamin C is how it interacts with other vitamins and minerals in the body, such as iron. Iron supports proper growth and development, aids the body’s ability to deliver oxygen throughout the body, and helps make certain hormones, according to the NIH. Nonheme iron, which is the type of iron found in plants, can be tricky for the body to absorb, but eating vitamin C (and ideally heme iron, which is commonly found in meat and seafood) at the same time as nonheme iron leads to better absorption, according to the Harvard T.H. Chan School of Public Health.
RELATED: 6 Best Nutrient Pairings for Your Heart
3. It Plays a Role in Enhanced Brain Function
“Vitamin C also plays a role in neurotransmitter synthesis and cognitive function,” Samuels says. Neurotransmitters are important for sending messages from the brain to the rest of the body, according to the University of Queensland, in Australia. And more vitamin C may be associated with increased brain function. A systematic review in Nutrients found higher vitamin C concentrations in cognitively intact study participants compared with those with impaired cognition.
4. Its Antioxidant Properties Help Guard Against Chronic Disease
Many of the benefits of vitamin C can be traced to its antioxidant properties. “Antioxidants act to neutralize free radicals, which are volatile and harmful substances produced in the body that cause damage to cells and tissues,” Samuels says. According to the Mayo Clinic, antioxidants can protect against the development of serious health conditions, such as cancer or heart disease. More studies — especially ones involving human participants — are needed, however, to show whether vitamin C specifically can prevent cancer or cardiovascular disease, per the Harvard T.H. Chan School of Public Health.
RELATED: 10 Healthy Foods High in Antioxidants
5. Vitamin C Strengthens the Immune System
Perhaps vitamin C’s best-known benefit is the positive effect it has on the immune system. In a research review, vitamin C was found to support the immune system by protecting against oxidative stress, aiding in microbial killing and decreasing the potential for tissue damage. A deficiency in this vitamin has been shown to increase the rate of infections. It’s unlikely that loading up on vitamin C once you start sniffling will keep you from getting a cold, but it could help you recover more quickly, according to another review.
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