Ascorbic Acid capsules, 90 Capsules
Pure Encapsulations Ascorbic Acid delivers vitamin C in its straightforward, crystalline ascorbic acid form, a well-researched compound that supports immune function, antioxidant activity, and connective tissue synthesis.
May be a fit for
- Adults seeking pure ascorbic acid without additives or fillers
- Individuals supporting immune function with daily vitamin C intake
- Those maintaining ascorbic acid levels during periods of physical stress
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Pure Encapsulations Ascorbic Acid delivers vitamin C in its straightforward, crystalline ascorbic acid form, a well-researched compound that supports immune function, antioxidant activity, and connective tissue synthesis. Formulated without unnecessary excipients, it's designed for those who want a clean, unflavored vitamin C option without common allergens or additives.
Why It's Worth Considering: Pure Encapsulations is a practitioner-grade brand recognized for rigorous third-party testing and hypoallergenic formulations, this capsule contains no fillers, binders, or artificial ingredients, making it a reliable baseline option for sensitive individuals.
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Our curation and trust scoring bring together manufacturing, testing, research, practitioner insight and reviews from across the web.
Our score is an editorial assessment, not a product certification or a guarantee of results.
Product details
Who it may suit
May be a fit for
- Adults seeking pure ascorbic acid without additives or fillers
- Individuals supporting immune function with daily vitamin C intake
- Those maintaining ascorbic acid levels during periods of physical stress
- Practitioners protocols requiring hypoallergenic vitamin C for sensitive patients
Considerations
- History of kidney stones (oxalate type) — use buffered form
- Hemochromatosis (iron overload — C enhances iron absorption)
- G6PD deficiency at very high IV doses
- Taking blood thinners at doses above 2g/day
Compatibility & interactions
Works Well With
Take Separately From
No significant interactions identified. Always consult your healthcare provider.
What to expect over time
Plasma Saturation
Blood levels reach therapeutic range
Immune Boost
Enhanced white blood cell function
Collagen Support
Improved skin elasticity and wound healing
Antioxidant Reserve
Reduced oxidative stress markers
Based on clinical research on vitamin C supplementation. Water-soluble — excess is excreted within hours.
Compare the options
Compare Vitamin C Forms
Which form delivers the most?
| Feature | Ascorbic Acid | Buffered (Ascorbate) | Liposomal | Ester-C |
|---|---|---|---|---|
| Bioavailability | Good (standard) | Good (gentler) | Excellent (2-3x) | Good |
| GI Tolerance | May cause acidity | Very gentle | Excellent | Gentle |
| Best For | Budget, general use | Sensitive stomachs | Maximum absorption | Sustained release |
| Price | $ | $ | $$$ | $$ |
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Thorne - Advanced Iron Complex (formerly Ferrasorb), 60 CapsulesVitamin C increases non-heme iron absorption by 2-3x. Essential pairing for vegetarians and those with iron deficiency.$26.99
NOW Foods - Collagen Peptides, 227 gVitamin C is required for collagen synthesis. Taking C with collagen peptides ensures your body can actually build new collagen.$23.99Real reviews. A wider perspective.
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2434 product and brand ratings and mentions across 7 sources.
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Pure Encapsulations is widely regarded as a high-quality, clean supplement brand, though some users question noticeable effectiveness.
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A few useful answers.
Research & further reading
More category questions
How much vitamin C should I take daily?
For maintenance, 500-1000mg daily is sufficient. For immune support during illness, 2000-4000mg in divided doses. The body can only absorb ~200-500mg at once, so split large doses throughout the day. Liposomal forms bypass this limit with 2-3x better absorption.
Is liposomal vitamin C worth the extra cost?
For most people, standard ascorbic acid at 500-1000mg is sufficient. Liposomal vitamin C is worth the premium if you need higher therapeutic doses (2000mg+) without GI distress, or if you have absorption issues. Studies show liposomal C achieves 2-3x higher blood levels than standard forms.
Can I take too much vitamin C?
Vitamin C is water-soluble and excess is excreted in urine. The main risk of high doses (3000mg+) is GI distress (diarrhea, cramping) and increased oxalate production, which may contribute to kidney stones in susceptible individuals. The 'bowel tolerance' test — increasing dose until loose stools, then backing off — is a common practitioner approach.
Does vitamin C really help prevent colds?
Meta-analyses show regular vitamin C supplementation reduces cold duration by 8% in adults and 14% in children, and reduces severity. It does NOT prevent colds in most people, but it does in those under physical stress (athletes, military). Taking vitamin C after cold symptoms start has minimal benefit — daily prevention is key.
When is the best time to take vitamin C?
Take with food to reduce potential stomach acidity. Morning dosing is common since vitamin C may mildly increase alertness. If taking large doses (1000mg+), split into 2-3 doses throughout the day for better absorption and sustained blood levels.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.