SOURCES, BENEFITS AND DEFICIENCIES
If you’ve ever heard of scurvy, you probably think of old-time sailors on long voyages without fresh fruit. But vitamin C deficiency isn’t just something from history books. While most people today get enough vitamin C, it’s still possible to fall short—especially if your diet isn’t balanced. Let’s look at why vitamin C is so important, how much you need, the best food sources, and what happens if you don’t get enough.
What Vitamin C Does for You
Vitamin C, also called ascorbic acid, is like a multi-tool for your body. It doesn’t just help fight off colds—it’s a key player in many of your body’s systems:
- Collagen production: Collagen is a protein that gives structure to your skin, bones, and blood vessels. Without enough vitamin C, your body struggles to make it. That means slower wound healing, weaker blood vessels, and gum problems.
- Immune support: Vitamin C helps white blood cells fight infections more effectively and keeps them safe from damage.
- Antioxidant protection: Free radicals are unstable molecules that damage your cells over time. Vitamin C is an antioxidant that helps neutralize them, protecting your skin, organs, and even your DNA.
- Iron absorption: If you eat plant-based foods like beans, spinach, or lentils, vitamin C helps your body absorb the type of iron they contain. Without it, you might feel weak or tired from iron deficiency.
- Skin health: Diets rich in vitamin C may keep your skin softer and smoother while slowing down the appearance of wrinkles.
How Much Vitamin C Do You Need?
Unlike some vitamins, your body doesn’t make or store vitamin C. That means you need to eat it every day. Here are the daily recommendations:
- Adult women: 75 milligrams
- Adult men: 90 milligrams
- Smokers: Add 35 milligrams more each day because smoking increases cell damage.
It doesn’t take much to reach these amounts. Half a cup of raw red bell pepper, three-quarters of a cup of orange juice, or one cup of strawberries can cover your daily needs.
Who’s Most at Risk for Low Vitamin C?
Most adults in the U.S. get enough, but some groups are more likely to run short:
- People with poor diets (low in fruits and vegetables)
- Smokers
- People with alcohol use disorder
- Those with certain chronic illnesses, such as kidney disease requiring dialysis
If you’re in one of these groups, it’s extra important to keep an eye on your vitamin C intake.
Good Sources of Vitamin C
Vitamin C is most abundant in fruits and vegetables. Cooking can destroy some of it, so eating raw or lightly cooked produce often gives you the biggest boost. Here are some of the best sources:
- Citrus fruits (oranges, grapefruits, lemons, limes)
- Red and green bell peppers
- Strawberries
- Kiwi
- Broccoli
- Brussels sprouts
- Tomatoes
- Cabbage
- Spinach
One fun fact: red bell peppers actually contain more vitamin C per serving than oranges.
What Happens When You’re Low on Vitamin C?
A lack of vitamin C can sneak up on you. Here are some of the most common symptoms:
- Slow wound healing: Your cuts and scrapes may take longer to close.
- Bleeding gums, nosebleeds, or easy bruising: Weak blood vessels and poor gum health are early warning signs.
- Tiredness and irritability: Some studies suggest low vitamin C can sap your energy and mood.
- Dry, wrinkled skin: Without antioxidants to protect it, skin can look older, faster.
- Weaker immunity: You might catch colds or infections more often, or take longer to recover.
- Weight gain: Some early research links low vitamin C to higher body fat, especially belly fat.
- Eye problems: Vitamin C may help slow age-related macular degeneration and reduce cataract risk.
The Extreme Case: Scurvy
Scurvy is rare today, but it still happens when people go for months with almost no vitamin C. Symptoms include:
- Loose teeth
- Joint pain
- Brittle bones
- Cracked fingernails
- Corkscrew-shaped body hair
- Severe fatigue
The good news? Once you start getting enough vitamin C again, symptoms begin to improve within days, and full recovery usually takes just a few months.
Can You Get Too Much Vitamin C?
Because vitamin C is water-soluble, your body flushes out the extra in your urine. Still, very high doses (more than 2,000 milligrams a day) can cause problems like stomach cramps, diarrhea, or kidney stones in some people. For most adults, food sources are plenty safe, and supplements are usually only needed if your diet is limited.
The Bottom Line
Vitamin C isn’t just a cold-season helper—it’s vital for your skin, bones, immune system, and overall health. The good news is that it’s easy to get enough if you include fruits and vegetables in your diet every day. Even small servings, like a half-cup of bell peppers or a glass of orange juice, can cover your daily needs.
So next time you’re building your plate, add a splash of color with strawberries, broccoli, or citrus. Your body—and maybe even your mood—will thank you.