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National Vitamin C Day

Celebrate National Vitamin C Day by adding citrus fruits to your diet! Enjoy a boost of immunity and health benefits with delicious oranges and lemons!

Sunday

April 2027

Last updated February 7, 2026 · by the Holiday Calendar Team

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YEARLY DATEApril 4

OBSERVED INUnited States

CATEGORYHealth

SUBCATEGORYNutrition

INTRO

Introduction

PHOTO

Celebrate National Vitamin C Day on April 4 and give your body the boost it needs! This special day commemorates the discovery of Vitamin C in 1932 by Hungarian scientist, Albert Szent-Gyorgyi. Vitamin C is an essential nutrient that helps keep our immune system strong, skin healthy, and bones strong. It can also help with inflammation, fatigue and more – so why not add a little extra to your diet on this special day?

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TIMELINE

National Vitamin C Day Timeline

Discovery of Scurvy Cure

British naval surgeon James Lind discovered that citrus fruits could prevent scurvy, leading to early understanding about the benefits of Vitamin C.

Identification of Vitamin C

Hungarian biochemist Albert Szent-Gyorgyi isolated a substance from plant juices and animal tissues which he named "hexuronic acid".

Discovery of Hexuronic Acid as Vitamin C

Szent-Gyorgyi discovered that hexuronic acid was actually Vitamin C and that it was the ingredient responsible for curing scurvy.

Increased Vitamin C Research

Chemist Linus Pauling proposed that large doses of Vitamin C could have preventative and therapeutic effects on the common cold.

National Vitamin C Day Established

The holiday National Vitamin C Day was officially registered and began to be celebrated on April 4th annually.

GET INVOLVED

How to Celebrate National Vitamin C Day

Eat oranges

Nothing says Vitamin C like eating a juicy orange. Not only are they tasty and sweet, but they contain the necessary vitamin C to help keep your body healthy.

DRINK

Drink orange juice

A great way to get your daily dose of Vitamin C is to drink a glass of orange juice. There are many varieties available, so you can choose whichever one suits your taste preferences.

MAKE

Make a Vitamin C smoothie

Combine oranges, strawberries, bananas, or any other fruit with some yogurt for a delicious and nutritious smoothie. Add honey or agave syrup for some sweetness and blend until smooth.

COOK

Cook with Vitamin C rich foods

Make a meal that incorporates foods with high levels of Vitamin C like bell peppers, kale, broccoli, tomatoes, and spinach. You can add them to salads, stir fries and soups for extra flavor and nutrition.

TAKE

Take a supplement

If you're not getting enough Vitamin C from your diet, consider taking a supplement. Talk to your doctor to figure out what type and dose is right for you.

WHY THIS DAY MATTERS

Why National Vitamin C Day is Important

Vitamin C helps to reduce risk of disease

Studies have shown that having adequate levels of vitamin C has been linked to a decreased risk of chronic diseases such as cancer, heart disease and stroke. It can also lower blood pressure, improve cholesterol levels and reduce inflammation, all of which can help protect us from developing serious health conditions.

Vitamin C is essential for a strong immune system

Vitamin C plays an important role in maintaining a healthy immune system. It helps to keep our bodies protected against harmful bacteria and viruses, and can help reduce inflammation in the body. Vitamin C supplements have also been shown to reduce the severity and duration of colds and other illnesses, which makes this vitamin even more important!

Vitamin C aids in collagen production

Collagen is an important protein found all over our bodies, including skin, bones, muscles, tendons and ligaments. Vitamin C helps to stimulate collagen production, which keeps our skin looking young and fresh. Plus, it's an essential nutrient for the formation of new tissue which can help repair damage from injuries or wounds.