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Nature’s Sunshine Vitamin C Citrus Bioflavonoid 500 mg, 90 Tablets Price: $17.16 (as of 03/24/2021 07:40 PST- Details) & FREE Shipping.

  • Protects Against Free Radical Damage – Our powerful product contains bioflavonoids, which help protect the body from free radical damage.
  • Aids In Collagen Production – Vitamin C plays a key role in collagen production which holds the body’s cells together and maintains skin integrity.
  • Provides 500 Mg Vitamin C – Contains 835% of the recommended daily value of vitamin C.
  • Natural Ingredients – Our formula includes vitamin C, calcium, phosphorus, grapefruit bioflavonoid extract, hesperidin, and lemon bioflavonoid extract.

Vitamin C, Citrus Bioflavonoids are nutritional compounds found together in nature. Bioflavonoids help protect the body from free radical damage. They are combined in a unique base containing 50 mg each of lemon bioflavonoids, orange bioflavonoids, grapefruit bioflavonoids, hesperidin complex, rutin and rose hips extract. One tablet contains 500 mg of vitamin C or 835 percent of the Daily Value. Contains no starch, sugar, artificial flavors or colors. Take 1 to 2 tablets with a meal three times daily.

What is Vitamin C and What Does It Do?

Vitamin C, also known as ascorbic acid, is a water-soluble nutrient found in some foods. It acts as an antioxidant in the body helping to protect cells from the damage caused by free radicals, compounds formed when our bodies convert the food we eat into energy. People are also exposed to free radicals in the environment from cigarette smoke, air pollution, and ultraviolet light from the sun.

The body also needs vitamin C to make collagen, a protein required to help wounds heal. In addition, vitamin C assists in the absorption of iron from plant-based foods and helps the immune system work properly to protect the body from disease. Vitamin C’s iron-absorption enhancing aid helps prevent iron-deficiency anemia.

Benefits of Vitamin C

These are a quick list of vitamin C’s powerful benefits:

  • Vitamin C performs many functions involving the immune system and tissue development.
  • Vitamin C is involved in iron absorption and in the syntheses of enzymes, hormones, and proteins.
  • The adrenal glands need large amounts of this nutrient in order to support immunity and help produce energy.
  • Vitamin C is easily washed from the body and needs to be replaced constantly. Without vitamin C, the body cannot make collagen, the substance that holds the body’s cells together and maintains skin integrity.
  • Vitamin C works best with attending bioflavonoids, which help protect the body from free radical damage.

Studies have shown that antioxidants may also aid in the treatment and prevention of multiple chronic conditions, such as heart disease, autoimmune disorders, and even cancer. Other studies on Vitamin C also suggest that a higher consumption of vitamin C-rich fruits and vegetables may be associated with a lower risk of many chronic conditions.

Moreover, more studies have repeatedly confirmed the immune-boosting benefits of vitamin C. For instance, a study published in the Annals of Nutrition & Metabolism concluded that getting enough vitamin C may help reduce symptoms and shorten the duration of respiratory tract infections like the common cold. Likewise, vitamin C may also help decrease the incidence of other conditions like pneumonia, malaria, and diarrhea.

Vitamin C supports heart health as shown by a review from the National University of Health Sciences. This study, made up of 13 studies, showed that supplementing with 500 milligrams of vitamin C daily significantly reduced levels of LDL cholesterol and triglycerides. Similarly, another human study from the University of Southampton found that a higher consumption of vitamin C was associated with a lower risk of death from stroke or coronary heart disease. Isn’t that wonderful?!

Because vitamin C is involved in the production of collagen, vitamin C is believed to help slow down skin aging and can also protect against skin damage caused by exposure to ultraviolet light. Plus, studies have shown that vitamin C may help suppress melanin production to prevent dark spots and patches.

Vitamin C reduces the Risk of Gout! Gout is a painful form of arthritis characterized by swollen and stiff joints due to a buildup of uric acid in the joints and most commonly affects the foot and big toe.

What Are Bioflavonoids?

Bioflavonoids, or flavonoids, are an extensive class of powerful phytochemicals. Phytochemicals are chemical compounds produced by plants and they are commonly found in fruits, vegetables, nuts, seeds, legumes, and grains. Not only are bioflavonoids impressive in and of themselves, but they also help maximize the benefits of vitamin C by inhibiting its breakdown in the body. Bioflavonoids are often found in many of the top vitamin C foods.

Broccoli, kale, red onions, hot peppers, rutabaga, spinach and watercress are all vegetables that top the charts, specifically the USDA Flavonoid Database, for their high bioflavonoid content. You should consume these bioflavonoid foods because they’ve been shown to have antiviral, anti-allergy, anti-inflammatory and antitumor abilities.

Recommended Use

Take 1–2 tablets with a meal three times daily.


500 mg Vitamin C per tablet (835% of the Daily Value), calcium, phosphorus, grapefruit bioflavonoid extract, hesperidin, lemon bioflavonoid extract, orange bioflavonoid extract, rutin and rose hips.


  1. Free Radicals, Antioxidants in Disease and Health
  2. Vitamin C as an antioxidant: evaluation of its role in disease prevention
  3. Prediction of dietary iron absorption: an algorithm for calculating absorption and bioavailability of dietary iron
  4. Immune-enhancing role of vitamin C and zinc and effect on clinical conditions
  5. Vitamin C supplementation lowers serum low-density lipoprotein cholesterol and triglycerides: a meta-analysis of 13 randomized controlled trials
  6. Vitamin C and risk of death from stroke and coronary heart disease in cohort of elderly people
  7. Topical Vitamin C and the Skin: Mechanisms of Action and Clinical Applications
  8. Vitamin C Intake and the Risk of Gout in Men – A Prospective Study

Additional information