Generic selectors
Exact matches only
Search in title
Search in content
Filter by Categories
Active Lifestyle
Amino Acids
Bladder Support
Blood Sugar Health
Body Care
Bone Health
Brain Health
Children's Health
Digestive Health
Essential Fatty Acids
Essential Oils
Functional Foods
Hair Health
Hair, Skin, Nails
Healthy Living
Heart Health
Herbal Remedies
Homepage Feature
Hormone Health
Immune Health
Joint Health
Liver Health
Lung Health
Men's Health
Natural Beauty
Oral Care
Pain Relief
Pet Health
Positive Aging
Prenatal Health
Sexual Health
Skin Care
Teen Health
Vision Health
Weight Loss
Women's Health
< Back to Healthy Living
How Vitamin C Can Help Keep You Healthy

How Vitamin C Can Help Keep You Healthy

Vitamin C for immune support? It’s not exactly breaking news. In fact, ramping up our vitamin C intake is one of the first things that many people do at the first sign of a cough, runny nose or sore throat. However, this only scratches the surface of what this powerful nutrient has to offer. In addition to boosting immunity[i], vitamin C also plays a key role in collagen formation, a substance vital for skin[ii], joint and circulatory health, aiding in the formation, maintenance and repair of tendons, ligaments and blood vessels. It also aids in bone health as well as wound healing[iii].

Ok, so we’ve established that vitamin C is important to help maintain optimal health. But how do we make sure we’re getting enough? It’s always a good idea to start with the diet. Once again, many people are well aware that citrus fruits like oranges and grapefruit are some of the best food sources of vitamin C around. But there are also some powerful, food-based vitamin C sources that perhaps don’t get enough love, including berries, tomatoes and kiwi, as well as green leafy vegetables like spinach and broccoli[iv].

That said, since our bodies aren’t able to synthesize vitamin C, we need a constant supply of it[v]. And since many diets can be hit-or-miss in the fruits and vegetables department, many people choose to add in a supplement. Additionally, the acidic nature of many food sources of vitamin C can often exacerbate digestive issues like heartburn[vi]. Unfortunately, many common vitamin C supplements also use an acidic form, ascorbic acid, leading to similar potential issues. To complicate things further, many supplement brands advertise “whole food” or “food-source” vitamin C products, while these are often just the same old ascorbic acid forms, with some plant-based components added in.

To get a vitamin C boost that’s easy on digestion, consider a form such as Ester-C®, comprised of less-acidic calcium ascorbate[vii]. In addition, when compared to ascorbic acid, the Ester-C® form has also shown greater absorption and retention within the white blood cells of the immune system, for up to 24 hours of immune support[viii]. The reason behind this enhanced absorption appears to be the presence of vitamin C metabolites, threonate and furanone, found only in calcium ascorbate[ix].

While vitamin C has rightfully earned its reputation as a powerful, natural immune booster, its many health benefits go far beyond simply keeping us going during cold and flu season. And whether relying on dietary sources, supplement forms, or a combination of the two, it’s definitely deserving of a place in your daily routine.

[i] Carr AC, Maggini S. Vitamin C and Immune Function. Nutrients. 2017;9(11)
[ii] Pullar JM, Carr AC, Vissers MCM. The Roles of Vitamin C in Skin Health. Nutrients. 2017;9(8)
[iii] Dephillipo NN, Aman ZS, Kennedy MI, Begley JP, Moatshe G, Laprade RF. Efficacy of Vitamin C Supplementation on Collagen Synthesis and Oxidative Stress After Musculoskeletal Injuries: A Systematic Review. Orthop J Sports Med. 2018;6(10):2325967118804544.
[iv] Chambial S, Dwivedi S, Shukla KK, John PJ, Sharma P. Vitamin C in disease prevention and cure: an overview. Indian J Clin Biochem. 2013;28(4):314-28.
[v] Nishikimi M, Fukuyama R, Minoshima S, Shimizu N, Yagi K. Cloning and chromosomal mapping of the human nonfunctional gene for L-gulono-gamma-lactone oxidase, the enzyme for L-ascorbic acid biosynthesis missing in man. J Biol Chem. 1994 May 6; 269(18):13685-8.
[vi] Jarosz M, Taraszewska A. Risk factors for gastroesophageal reflux disease: the role of diet. Prz Gastroenterol. 2014;9(5):297-301.
[vii] Lee JK, Jung SH, Lee SE, et al. Alleviation of ascorbic acid-induced gastric high acidity by calcium ascorbate and . Korean J Physiol Pharmacol. 2018;22(1):35-42.
[viii] Moyad MA, Combs MA, Vrablic AS, Velasquez J, Turner B, Bernal S. Vitamin C metabolites, independent of smoking status, significantly enhance leukocyte, but not plasma ascorbate concentrations. Adv Ther. 2008;25(10):995-1009.
[ix] Fay MJ, Verlangieri AJ. Stimulatory action of calcium L-threonate on ascorbic acid uptake by a human T-lymphoma cell line. Life Sci. 1991;49(19):1377-81.
SISU Ester-C®

About the Author: Sisu


Sisu is committed to helping Canadians find their perfect balance. Their ever-expanding line of natural health products is driven by innovative, clinically-validated ingredients and industry-leading environmental awareness. Learn more at