

Health products and supplements are an affordable and effective way to ensure you and your loved ones are getting the daily recommended intake of essential vitamins, minerals and other important nutrients necessary for optimal health.
Esterol Ester-C® provides highly bioavailable vitamin C as Ester-C® calcium ascorbate, buffered for improved tolerance and supported by bioflavonoids quercetin, rutin, and grape seed extract.* Research shows Ester-C® enhances vitamin C uptake by immune cells, promotes immune resilience, supports antioxidant defenses, and aids in collagen, adrenal, and connective tissue health.* Two capsules of Esterol Ester-C® contain 1.35 grams of vitamin C as calcium ascorbate.
Serving Size: 2 capsules
Servings Per Container: 50 or 100
Amount per serving:
Vitamin C (as Calcium Ascorbate): 1.35 g
Calcium (as Calcium Ascorbate): 150 mg
Rutin: 100 mg
Quercetin Dihydrate: 50 mg
Grape Seed Extract (92% Proanthocyanidins): 5 mg
Other Ingredients
Hydroxypropyl methylcellulose, magnesium stearate, silicon dioxide.
As a dietary supplement, take 2 capsules daily with meals, or as directed by a healthcare practitioner.
If you are pregnant or lactating, have any health condition or are taking any medication, consult your healthcare practitioner before use.
Store in a cool, dry place, tightly capped, away from light. Keep out of the reach of children. Use only if safety seal is intact. Variations in product color may occur.
• Ester-C® (calcium ascorbate, 1.35 g per 2 capsules): A unique, pH-neutral form of vitamin C with added metabolites that enhances uptake into white blood cells and prolongs retention for sustained biological activity.*[1-3]
• Bioflavonoids (quercetin, rutin, grape seed extract): Provide additional antioxidant activity, helping stabilize vitamin C while contributing vascular, immune, and connective tissue benefits.*[10,11]
• Buffered Formulation: Calcium ascorbate is gentler on the stomach and may reduce the risk of oxalate formation compared to ascorbic acid.*[8,9]
• Enhanced Immune Cell Activity: Clinical studies show Ester-C® supports improved neutrophil and NK cell function, histamine metabolism, and white blood cell activity compared to regular vitamin C.*[2,3,5]
• Adrenal and Connective Tissue Support: Vitamin C is concentrated in adrenal glands and plays a vital role in collagen synthesis and stress hormone production.*[6,7]
Ideal for individuals seeking a well-tolerated, highly bioavailable form of vitamin C to support immune, antioxidant, and tissue health, especially those sensitive to acidic forms or with increased vitamin C needs.*
This formula combines 1.35 grams of buffered vitamin C with complementary bioflavonoids to mirror nature’s delivery system, enhancing cellular uptake and tolerability. It is free from common allergens and formulated for clinical efficacy.*
1. Gruenwald J, et al. Adv Ther. 2006;23(1):171–178.
2. Calder PC, et al. Nutrients. 2025;17(2):279. doi:10.3390/nu17020279
3. Mitmesser SH, et al. Springerplus. 2016;5(1):1161. doi:10.1186/s40064-016-2605-7
4. Bush MJ, Verlangieri AJ. Res Commun Chem Pathol Pharmacol. 1987;57(1):137–140.
5. Verlangieri AJ, et al. Life Sci. 1991;48(23):2275–2281.
6. Dickerson B, et al. Nutrients. 2024;16(19):3358. doi:10.3390/nu16193358
7. Moyad MA, et al. Adv Ther. 2008;25(10):995–1009.
8. Van Straten M, Josling P. Adv Ther. 2002;19(3):151–159.
9. Moyad MA, et al. Urol Nurs. 2009;29(2):95–102.
10. Ganeshpurkar A, Saluja AK. Saudi Pharm J. 2017;25(2):149–164.
11. Deepika, Maurya PK. Molecules. 2022;27(8):2498. doi:10.3390/molecules27082498
Buffered Vitamin C with Enhanced Immune Uptake and Antioxidant Support*
| Size | SKU | Price |
|---|---|---|
| 100 Vegetarian Capsules | 70070 | $40.49 |
| 200 Vegetarian Capsules | 70080 | $59.29 |
Our mission is to help you enjoy optimum health through proper nutrition! Good health is all about looking your best and having the energy and stamina to do the things you love. It's difficult to be productive and happy if you're sick or run down all the time. We believe strongly that certain supplements should be at the core of your health program.
We are committed to providing only high quality products. Many brands will never be sold in our stores due to concerns we have with their quality control or business practices.
BioHelp is a family owned and operated nutraceutical distribution company. BioHelp offers a wide range of professional only product lines, to everyone who's main goal is to achieve a better quality of life, and we take pride in our ability to educate our clients on product selection. We are your personal concierge to the nutraceutical world. With the growing awareness of food allergies, our staff is able to provide support on products that would best suit the best. Make sure your body is getting all the nutrition it needs to stay healthy and keep you strong. BioHelp will steer you in the right direction and ensure your supplements fit your goals and lifestyle.
Registered to Echidna LLC, TIN 460522441
1600 148th Avenue Southeast,
Bellevue, WA 98007