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Vitamin C, also known as ascorbic acid, is a crucial nutrient for immune function, skin health, and antioxidant defense. With numerous options available, selecting the right supplement ensures you receive its full benefits effectively and safely. This guide helps navigate the key factors to consider when purchasing an ascorbate C vitamin supplement.
ANTIOXIDANT PROTECTION: NOW C-500 Calcium capsules provide a daily dose of vitamin C, which is necessary for the production of collagen and is therefore also important for skin, bone, and joint health.
CALCIUM ASCORBATE-C WITH BIOFLAVONOIDS: This product supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic; it is enhanced with bioflavonoids, which work synergistically with vitamin C.
GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
ANTIOXIDANT PROTECTION*: NOW C-500 Calcium capsules provide a daily dose of vitamin C, which is necessary for the production of collagen and is therefore also important for skin, bone, and joint health*
CALCIUM ASCORBATE-C WITH BIOFLAVONOIDS: This product supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic; it is enhanced with bioflavonoids, which work synergistically with vitamin C*
GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product...
Well-Retained; The Vitamin C metabolites in Ester-C positively impact retention of Vitamin C in cells; This complex yields beneficial antioxidant and immune system support; Includes natural bioflavonoids, acerola berry, and rose hips fruit powder
Unique Formula; Special manufacturing process creates a unique calcium ascorbate metabolite complex; Less acidic, pH neutral Vitamin C for sensitive stomachs; Easy to digest, highly-absorbable
Immune Support & More; Solgar Ester-C Plus 500 mg Vitamin C Vegetable Capsules also contribute to collagen formation for healthy skin and cartilage; Increases iron absorption
Vegan, Kosher & Gluten Free; Solgar Ester C Vegetable Capsules with 500 mg of Vitamin C are free of: gluten, wheat, dairy, soy, yeast, sugar, sodium, artificial flavor, sweetener, and color
ANTIOXIDANT PROTECTION*: A highly effective antioxidant that can help maintain healthy tissues by neutralizing free radicals generated during normal metabolism and exposure to environmental stressors*
VEGAN TABLETS/WITH 250 MG BIOFLAVONOIDS: Supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic, and enhanced with bioflavonoids, which work synergistically with vitamin C*
CERTIFICATIONS/CLASSIFICATIONS: Soy Free, Non-GMO, Vegan/Vegetarian, Nut Free, Made without Gluten, Dairy Free, Egg Free, Kosher
GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product...
For Sensitive Individuals: Buffered ascorbic acid combines calcium ascorbate, magnesium ascorbate, and potassium ascorbate to create a neutral pH vitamin C*
Lessens Gastric Irritation: This special form of ascorbic acid lessens possible gastric irritation in sensitive individuals*
Antioxidant Support: Vitamin C offers a wide range of support for the human body, and it is an antioxidant and free radical scavenger*
Pure Quality: Our supplements are made with premium ingredients sourced from trusted suppliers and guided by nutritional experts, then manufactured and tested to verify potency and purity
Amazing Value Liposomal Vitamin C. Our product contains 200 vegetable capsules of 1500 mg of liposomal vitamin C per serving in each bottle for a full 100-day supply. Our pure formula includes 1450 mg of pure Liposomal Vitamin C and only 50mg of sunflower...
Fat-Soluble Vitamin C. Our Liposomal Vitamin C complex supports your immune system. The powerful combination of sunflower phospholipids, which are the building blocks of cell membranes, and Vitamin C creates an antioxidant supplement that neutralizes...
Antioxidant Health Benefits. Vitamin C, ascorbate, is a powerful antioxidant that helps protect against free radical damage.
Mega Healthy Lifestyle. Our Liposomal Vitamin C Capsules are non-GMO, soy-free, gluten-free, organic, vegetarian, doctor-formulated, and dairy-free. They use sodium ascorbate and palmitic acid to create Ascorbyl palmitate, a fat-soluble form of Vitamin C...
Calcium Ascorbate Powder: Buffered, less acidic form of vitamin C paired with calcium, widely used in immune-focused and antioxidant-focused wellness routines and supplement stacks.
Unflavored Easy-Mixing Powder: Fine, white powder, 1g servings, dissolves into water, juice, or smoothies for flexible, routine-friendly daily use, no capsules to swallow.
Vegan and Gluten Free: Single-ingredient calcium ascorbate, no flavors or proprietary blends, a clean base that pairs easily with other vitamins and minerals in your routine.
Made in a cGMP-Compliant Facility: Manufactured in a facility that follows current Good Manufacturing Practices (cGMP) for consistent, carefully produced supplements you can rely on.
Calcium Ascorbate Powder: Buffered, less acidic form of vitamin C paired with calcium, widely used in immune-focused and antioxidant-focused wellness routines and supplement stacks.
Unflavored Easy-Mixing Powder: Fine, white powder, 1g servings, dissolves into water, juice, or smoothies for flexible, routine-friendly daily use, no capsules to swallow.
Vegan and Gluten Free: Single-ingredient calcium ascorbate, no flavors or proprietary blends, a clean base that pairs easily with other vitamins and minerals in your routine.
Made in a cGMP-Compliant Facility: Manufactured in a facility that follows current Good Manufacturing Practices (cGMP) for consistent, carefully produced supplements you can rely on.
ANTIOXIDANT PROTECTION*: A highly effective antioxidant that can help maintain healthy tissues by neutralizing free radicals generated during normal metabolism and exposure to environmental stressors.*
VEGAN TABLETS/WITH 250 MG BIOFLAVONOIDS: Supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic, and enhanced with bioflavonoids, which work synergistically with vitamin C.*
CERTIFICATIONS/CLASSIFICATIONS: Soy Free, Non-GMO, Vegan/Vegetarian, Nut Free, Made without Gluten, Dairy Free, Egg Free, Kosher, Low Sodium
GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
Gentle on the Stomach: A non-acidic form of Vitamin C, as Sodium Ascorbate.
Laboratory: This product has been tested for GMO and it is GMO-FREE.
Superior Quality: All Bronson products are tested in our state-of-the-art cGMP registered facility in New York.
Trusted Since 1960: The pioneers of Bronson Vitamins were a group of pharmacists who witnessed the benefits of vitamins and mineral supplementation firsthand with their patients. Bronson Vitamins have been consistently mentioned by top medical...
Last update on 2026-10-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Ascorbate C Vitamin Supplements
Form of Vitamin C
Ascorbic acid is the most common form, but other buffered or esterified forms may be gentler on the stomach for some individuals. Look for supplements that clearly state the form of vitamin C used, such as calcium ascorbate or sodium ascorbate, if you have a sensitive digestive system.
Dosage and Potency
Vitamin C dosages can range widely, from 100 mg to over 1000 mg per serving. The recommended daily allowance varies by age and sex, but many supplements offer doses significantly higher for therapeutic purposes. Consider your individual needs and consult a healthcare professional if unsure about the appropriate dosage.
Added Ingredients and Purity
Check the ingredient list for fillers, artificial colors, or allergens like soy or gluten, especially if you have dietary restrictions. Opt for products that are third-party tested for purity and potency, indicated by certifications from organizations like USP or NSF. This verification ensures the supplement contains what it claims and is free from contaminants.
Bioavailability and Absorption
Some formulations are designed to enhance absorption. Liposomal vitamin C, for example, encapsulates the vitamin in lipid spheres to potentially improve uptake. While not always necessary, these advanced forms might be beneficial for individuals with absorption issues or those seeking maximum benefit.
Frequently Asked Questions
What is the difference between ascorbic acid and other forms of Vitamin C?
Ascorbic acid is the pure, most acidic form. Other forms, like calcium ascorbate or magnesium ascorbate, are buffered and less acidic, which can be gentler on the stomach for sensitive individuals.
How much Vitamin C should I take daily?
The Recommended Dietary Allowance (RDA) for adults is typically around 75-90 mg per day. However, many supplements offer higher doses for specific health goals; consult with a healthcare provider to determine your personal needs.
Are there any side effects of taking high doses of Vitamin C?
High doses can sometimes cause digestive upset, such as diarrhea or nausea. It's generally recommended to start with a lower dose and gradually increase it, and to stay within recommended upper intake levels.
What does 'third-party tested' mean for supplements?
Third-party testing means an independent laboratory has verified the product's purity, potency, and ingredient accuracy. This ensures the supplement meets label claims and is free from harmful contaminants.
Can I get enough Vitamin C from diet alone?
It is possible to meet your Vitamin C needs through a balanced diet rich in fruits and vegetables like citrus, berries, and bell peppers. However, supplements can be a convenient way to ensure adequate intake, especially if dietary intake is insufficient.
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