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Isotonix® Vitamin C

Single bottle (90 servings)
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Isotonix® Vitamin C

Isotonix® Vitamin C

Isotonix®
$38.95
  • Not all Vitamin C is Created Equal
  • Exceptional Immune Health Support
  • Formulated for Maximum Absorption and Digestive Comfort
  • Promotes Healthy Collagen Production
  • Supports a Healthy Heart and Brain
Code  13033
+ $0.78 / 2.0% Cashback
Product Features

Our Bodies Do Not Produce Vitamin C
This nutrient is essential for its antioxidant and immune-supporting properties and is an important builder of collagen and muscles; it is crucial for a healthy heart, body and mind. Getting vitamin C through food isn't sufficient, so supplementing is key.

Isotonix® Vitamin C stands above the rest with a unique and gentle-on-the-stomach, buffered formulation that promotes exceptional overall health. Most people don't get enough vitamin C, ensure that you do. Powerfully deliver what your body demands with Isotonix®!
Ingredients

Active Ingredients: Vitamin A (as beta-carotene), Vitamin C (as ascorbic acid), Potassium (as potassium bicarbonate).

Other Ingredients: Fructose, glucose, maltodextrin, malic acid, orange flavor, silica, citric acid, stearic acid.

  • Free shipping on orders over $125.00

Pairs Well With

image of Isotonix Magnesium
Isotonix® Magnesium

Isotonix®

$44.95
13324 - productPrimaryImage
Isotonix® Vitamin D with K2

Isotonix®

$36.95
5821590usa - productPrimaryImage
Pure Collagen+

Pure Collagen

$50.95
Code  13033

The Vitamin C Advantage

90mg

Recommended daily allowance of vitamin C for males

75mg

Recommended daily allowance of vitamin C for females

Vitamin C, One of the World's Most Popular Vitamins

Vitamin C (ascorbic acid) is one of the most powerful antioxidants and immune-supporting nutrients available today. Vitamin C is a hard-working water-soluble antioxidant that protects the body at a cellular level. It combats oxidative stress in the bloodstream and within cells, helps restore and promote antioxidant levels, like vitamin E, and supports immune response and cardiovascular function.
image of citrus fruit

Key Ingredients

image of oranges

Vitamin C (Ascorbic Acid)*

Provides antioxidant protection
Helps maintain healthy cholesterol levels
image of carrots

Beta Carotene (Vitamin A Precursor)*

Promotes cognitive health
Promotes immune functions
image of bananas

Potassium (Bicarbonate)*

Promotes skeleton, muscle and skin health
Promotes normal regulation of heart functions

Antioxidant Support

Isotonix Vitamin C sets itself apart from other products on the market, providing the maximum absorption of nutrients in the shortest amount of time. Isotonix Vitamin C provides superior delivery of the nutrients your body needs in the most cost-effective way.

Isotonix Delivery System

Isotonix Liquid Vitamins
:05 minutes

Isotonix Liquid Vitamins

  • Formulated to survive digestion.
  • Delivers concentrated nutrients to the site of absorption.
  • Contains no fillers or binders.
  • No artificial color or flavors. 
Standard Vitamin Tablet
:40 minutes

Standard Vitamin Tablet

  • Contains lab-created coatings and lubricants.
  • Often contains artificial colors, nutrients and flavors.
  • Limited absorption of nutrient utilization. 

Directions for Use

Person pouring a capful of Isotonix Vitamin C into a glass.

Pour one small capful (3.3g) of Isotonix Vitamin C powder into your favorite cup.

Person mixing Isotonix Vitamin C in same glass of water.

Mix: Add 2 fluid ounces (60ml) of water per capful and stir until fully dissolved.

Person drinking Isotonix Vitamin C.

Enjoy: Drink once daily on an empty stomach for maximum absorption, savoring the refreshing citrus flavor!

Frequently asked Questions

Who needs to supplement with Isotonix Vitamin C Formula?
Anyone over 18 can use Isotonix Vitamin C Formula to add vitamin C to their diet because very few of us get the recommended five servings of fruits and vegetables in our daily diets.
Is it possible to take too much Isotonix Vitamin C Formula?
Ascorbic acid is extremely safe, even at relatively high levels (because most of the excess is excreted in the urine). At high doses (over 1000 milligrams/day), some people can experience gastrointestinal side effects, such as stomach cramps, nausea and diarrhea. It is recommended that you take vitamin C supplements in gradual servings throughout the day to achieve maximum benefits.*
How does Isotonix Vitamin C Formula aid in cardiovascular health?
It helps maintain healthy cholesterol and triglyceride levels, promoting healthy arterial walls and helping maintain normal blood pressure. It helps the body maintain vitamin E levels, which has known benefits for the cardiovascular system. Finally, vitamin C supports normal platelet activity.*
What is the best way to store this product?
Keep Isotonix in a dry, cool place. If Isotonix are stored in the kitchen, keep them away from the stove, sink, any heat-generating appliances or window ledges. If you live in a very humid area, you may store Isotonix products in the refrigerator, but not in the fruit and vegetables area.

Isotonix® Vitamin C Research Scope

Reference List

  • Bates CJ. Vitamin A. Lancet. 1995; 345:31-35. Bauer R, Jurcic K, Puhlmann J, Wagner H. Immunological in-vivo and in-vitro examinations of echinacea extracts. Arzneimittel-Forsch 1988;38:276-81. 
  • Bendich A. Antioxidant vitamins and human immune responses. Vitam Horm 1996;52:35-62:35-62. 
  • Carr A, Frei B. Does vitamin C act as a pro-oxidant under physiological conditions? FASEBJ. 1999; 13:1007-1024. 
  • Carr AC, Tijerina T, Frei B. Vitamin C protects against and reverses specific hypochlorous acid- and chloramine-dependent modifications of low-density lipoprotein. Biochem J. 2000; 346 Pt 2:491-496. 
  • Chapter 5 - Vitamin C. In: Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. A Report of the Panel on Dietary Antioxidants and Related Compounds, Subcommittees on Upper Reference Levels of Nutrients and Interpretation and Uses of Dietary Reference Intakes, and the Standing Committee on the Scientific Evaluation of Dietary Reference Intakes. Food and Nutrition Board, Institute of Medicine. National Academy Press:Washington, DC, 2000, pp. 95-185. 
  • Cosgrove J. Immune support-granting immunity. New ingredients join familiar favorites in the charge for immune enhancement. Nutritional Outlook 2000;41:4. 
  • Daudu PA, Kelley DS, Taylor PC, Burri BJ, Wu MM. Effect of a low beta-carotene diet on the immune functions of adult women. Am J Clin Nutr. 1994 Dec;60(6):969-72. 
  • Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, D.C.: National Academy Press; 2000.
  • Friedman PA, Zeidel ML. Victory at C. Nature Med. 1999; 5:620-621. 
  • Futoryan T, Gilchrest BA. Retinoids and the skin. Nutr Rev. 1994; 52:299-310. 
  • Gamble J, Grewal PS, Gartside IB. Vitamin C modifies the cardiovascular and microvascular responses to cigarette smoke inhalation in man. Clin Science. 2000; 98:455-460. 
  • Halliwell B. Vitamin C: poison, prophylactic or panacea - Trends Biochem Sci. 1999; 24:255-259. 
  • Harding JJ, Hassett PC, Rixon KC, et al. Sugars including erythronic and threonic acids in the human aqueous humor. Curr Eye Res. 1999; 19:131-136. 
  • Hermans JJ, Fischer MA, Schiffers PM, Struijker-Boudier HA. High dietary potassium chloride intake augments rat renal mineralocorticoid receptor selectivity via 11beta-hydroxysteroid dehydrogenase. Biochim Biophys Acta. 1999; 1472:537-549.
  • Hodison T, Socaciu C, Ropan I, Neamtu G. Carotenoid composition of Rosa canina fruits determined by thin-layer chromatography and high performance liquid chromatography. J Pharmaceut Biomed Anal. 1997; 16:521-528. 
  • Hornero-Méndez D, Minguez-Mosquera MI. Carotenoid pigments in Rosa mosqueta hips, an alternative carotenoid source for foods. J Agric Food Chem. 2000; 48:825-828. 
  • Hwang J, Peterson H, Hodis HN, et al. Ascorbic acid enhances 17 beta-estradiol-mediated inhibition of oxidized low density lipoprotein formation. Atherosclerosis. 2000; 150:275-284. 
  • Jayachandran M, Panneerselvam C. Cellular immune responses to vitamin C supplementation in aging humans assessed by the in vitro leucocyte migration inhibition test. Med Sci Res 1998;26:227-30. 
  • Jin L, ChaoL, Chao J. Potassium supplement upregulates the expression of renal kalikrein and bradykinin B2 receptor in SHR. Am J Physiol. 1999; 276:F476-F484. 
  • Kelly GS. Larch arabinogalactan: clinical relevance of a novel immune-enhancing polysaccharide. Altern Med Rev 1999;4:96-103.
  • Lykkesfeldt J, Christen S, Wallock LM, et al. Ascorbate is depleted by smoking and repleted by moderate supplementation: a study in male smokers and nonsmokers with matched dietary intakes. Am J Clin Nutr. 2000; 71:530-536. 
  • McCabe RD, Backarich MA, Srivastava K, Young DB. Potassium inhibits free radical formation. Hypertension. 1994; 24:77-82.
  • McCabe RD, Young DB. Potassium inhibits cultural vascular smooth muscle proliferation. Am J Hypertens. 1994; 7:346-350.
  • Mowat C, Carswell A, Wirz A, McColl KEL. Omeprazole and dietary nitrate independently affect levels of vitamin C and nitrite in gastric juice. Gastroenterology. 1999; 116:813-822. 
  • Park JB, Levine M. Intracellular accumulation of ascorbic acid is inhibited by flavonoids via blocking of dehydroascorbic acid and ascorbic acid uptakes in HL-60, U937 and Jurkat cells. J Nutr. 2000; 130:1297-1302. 
  • Pauling L. Evolution and the need for ascorbic acid. Proc Natl Acad SciUSA. 1970; 67:1643-1648. 
  • Penn ND, Purkins L, Kelleher J, Heatley RV, Mascie-Taylor BH, Belfield PW. The effect of dietary supplementation with vitamins A, C and E on cell- mediated immune function in elderly long-stay patients: a randomized controlled trial. Age Ageing 1991;20(3):169-174. 
  • Peters EM, Anderson R, Theron AJ. Attenuation of increase in circulating cortisol and enhancement of the acute phase protein response in vitamin C-supplemented ultramarathoners. Int J Sports Med 2001;22:120-6. 
  • Podmore ID, Griffiths HR, Herbert KE, et al. Vitamin C exhibits pro-oxidant effects. Nature. 1998; 392:559. 
  • Raitakari OT, Adams MR, McCredie RJ, et al. Oral vitamin C and endothelial function in smokers: short-term improvement, but no sustained beneficial effect. J Amer Coll Cardiol. 2000; 35:1616-1621. 
  • Rehman A, Collis CS, Yang M, et al. The effects of iron and vitamin C co-supplementation on oxidative damage to DNA in healthy volunteers. Biochem Biophys Res Commun. 1998; 246:293-298.
  • Rowe DJ, Ko S, Tom XM, et al. Enhanced production of mineralized nodules and collagenous proteins in vitro by calcium ascorbate supplemented with vitamin C metabolites. J Periodontol. 1999; 70:992-929. 
  • Satterlee DG, Aguilera-Quintana I, Munn BJ, Krautmann BA. Vitamin C amelioration of the adrenal stress response in broiler chickens being prepared for slaughter. Comp Biochem Physiol A 1989;94:569-74. 
  • Semba RD. The role of vitamin A and related retinoids in immune function. Nutr Rev. 1998 Jan;56(1 Pt 2):S38-48. 
  • Simon JA, Hudes ES. Relationship of ascorbic acid to blood lead levels. J Amer Med Assoc. 1999; 281:2298-2293. 
  • Skaper SD, Fabris M, Ferrari V, et al. quercetin protects cutaneous tissue-associated cell types including sensory neurons from oxidative stress induced by glutathione depletion: cooperative effects of ascorbic acid. Free Rad Biol Med. 1997; 22:669-678.
  • Sohlenius-Sternbeck A-K, Appelkvist E-L, De Pierre JW. Effects of vitamin A deficiency on selected xenobiotic-metabolizing enzymes and defenses against oxidative stress in mouse liver. Biochem Pharmacol. 2000; 59:377-383. 
  • Thurnham DI. Micronutrients and immune function: some recent developments. J Clin Pathol. 1997 Nov;50(11):887-91. 
  • Tsukaguchi H, Tokui T, Mackenzie B, et al. A family of mammalian Na+-dependent L-ascorbic acid transporters. Nature. 1999; 399:70-75. 
  • Underwood BA, Arthur P. The contribution of vitamin A to public health. FASEB J. 1996; 10:1040-1048 
  • WangY, Mackenzie B, Tsukaguchi H, et al. Human vitamin C (L-ascorbic acid) transporter SVCT1. Biochem Biophys Res Commun. 2000; 267:488-494. 
  • West SG, Light KC, Hinderliter AL, et al. Potassium supplementation induces beneficial cardiovascular changes during rest and stress in salt sensitive individuals. Health Psychol. 1999; 18:229-240. 
  • Zhou X, Xie M, Niu C, Sun R. The effects of dietary vitamin C on growth, liver vitamin C and serum cortisol in stressed and unstressed juvenile soft-shelled turtles (Pelodiscus sinensis). Comp Biochem Physiol A Mol Integr Physiol 2003;135:263-70. 

43%

The percentage of U.S. adults with inadequate vitamin C intake

90%

The amount of dietary vitamin C lost from food when heated

100x

The concentration of vitamin C in the adrenal gland ("stress glands"), highlighting the importance of daily vitamin C intake

*These statements have not been evaluated by the Food and Drug Administration. This product(s) is not intended to diagnose, treat, cure or prevent any disease.

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