Vitamin C 1000mg — Buffered Ascorbic Acid
High-strength vitamin C in a pH-neutral (buffered) form — gentler on the stomach than standard ascorbic acid.
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Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
Vitamin C is essential for immune function, collagen synthesis, and antioxidant defence. Our buffered form (calcium ascorbate) is pH-neutral, making it significantly gentler on the stomach than regular ascorbic acid — ideal for sensitive digestive systems or high-dose use.
Each tablet provides 1000mg — over 12x the UK RNI. Vitamin C is water-soluble and excess is excreted harmlessly. 120 tablets = 4 months at 1 per day.
Benefits
- ✓Immune support
- ✓Collagen synthesis
- ✓Antioxidant
- ✓Iron absorption
- ✓Skin health
Complete your stack
✨What customers say
From 20 reviews★ 4.5Customers appreciate the high dose of 1,000mg per capsule, which they find effective for immune support and gentler on the stomach compared to regular vitamin C. Many also note skin benefits and the absence of fillers or additives.
Some minor complaints include the size of the capsules being a bit large for some users and a few customers wishing for more detailed information on sourcing or production.
This product is ideal for individuals seeking high-dose vitamin C for immune support, those with sensitive stomachs, and anyone looking to improve skin health through collagen synthesis.
Customer reviews
- ★★★★★Charlotte F.14/05/20261g per capsule is the right dose
100mg vitamin C supplements are too low to be meaningful. 1,000mg daily is where the evidence for immune function sits.
- ★★★★☆Freya Z.22/04/2026Good quality and value
High dose buffered C at a sensible price. No fillers or unnecessary additives. Good clean supplement.
- ★★★★☆Noah H.13/04/2026Good quality and value
High dose buffered C at a sensible price. No fillers or unnecessary additives. Good clean supplement.
- ★★★★☆James T.10/04/2026Good quality and value
High dose buffered C at a sensible price. No fillers or unnecessary additives. Good clean supplement.
- ★★★★★Grace S.23/03/2026Buffered form gentler on the stomach
Regular ascorbic acid upset my stomach. The buffered version is completely fine even on an empty stomach.
- ★★★★☆Ella U.22/03/2026Skin benefits too
The role of vitamin C in collagen synthesis is well established. My skin has been clearer since supplementing consistently.
- ★★★★★Chloe V.21/03/20261g per capsule is the right dose
100mg vitamin C supplements are too low to be meaningful. 1,000mg daily is where the evidence for immune function sits.
- ★★★★★Thomas A.06/03/2026Buffered form gentler on the stomach
Regular ascorbic acid upset my stomach. The buffered version is completely fine even on an empty stomach.
- ★★★★☆Sophie R.03/03/2026Skin benefits too
The role of vitamin C in collagen synthesis is well established. My skin has been clearer since supplementing consistently.
- ★★★★★Chloe V.27/02/2026Buffered form gentler on the stomach
Regular ascorbic acid upset my stomach. The buffered version is completely fine even on an empty stomach.
- ★★★★★Grace S.26/02/2026Buffered form gentler on the stomach
Regular ascorbic acid upset my stomach. The buffered version is completely fine even on an empty stomach.
- ★★★★☆Liam C.10/02/2026Good quality and value
High dose buffered C at a sensible price. No fillers or unnecessary additives. Good clean supplement.
- ★★★★★Jack N.09/02/20261g per capsule is the right dose
100mg vitamin C supplements are too low to be meaningful. 1,000mg daily is where the evidence for immune function sits.
- ★★★★☆Charlie D.27/01/2026Skin benefits too
The role of vitamin C in collagen synthesis is well established. My skin has been clearer since supplementing consistently.
- ★★★★★Hannah O.27/01/20261g per capsule is the right dose
100mg vitamin C supplements are too low to be meaningful. 1,000mg daily is where the evidence for immune function sits.
- ★★★★★Michael C.Verified buyer25/11/2025Post-surgery healing remarkable
Surgeon recommended high-dose vitamin C (ascorbate form, not ascorbic acid) for wound healing. Collagen synthesis requires vitamin C. My surgical wound healed noticeably faster than expected. GP confirmed good healing progress.
- ★★★★☆Susan P.01/11/2025Gentler form, same immune benefits
Switched from regular 1000mg C to this buffered version. No stomach sensitivity now and immune benefit (fewer winter illnesses) is the same. For those with sensitive stomachs this is the obvious choice.
- ★★★★★Dorothy F.Verified buyer16/09/2025Finally — high dose C that doesn't cause stomach issues
Regular vitamin C supplements at 1000mg caused acid reflux and stomach pain. The buffered (ascorbate) form is pH-neutral and completely tolerable even on an empty stomach. Blood plasma vitamin C now optimal on annual test.
- ★★★★☆Nicola T.Verified buyer13/09/2025Good quality, proper dose
1000mg buffered C with bioflavonoids — the bioflavonoids enhance absorption and synergise with vitamin C. Properly formulated rather than plain ascorbic acid. Immune function clearly improved this winter.
- ★★★★★David F.Verified buyer23/08/2025IV C replacement for home use
Hospital-grade IV vitamin C is impractical for regular use. High-dose oral buffered vitamin C is the next best option for sustained high plasma levels. Good quality sodium ascorbate with bioflavonoids.
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