Buffered C-1000 Complex, 90 Tablets
NOW Foods Buffered C-1000 Complex delivers 1,000 mg of vitamin C per serving in a buffered form, combining ascorbic acid with calcium, magnesium, and potassium ascorbates, to support immune function, antioxidant activity, and collagen synthesis.
May be a fit for
- Adults seeking buffered vitamin C with reduced gastrointestinal sensitivity
- Those supporting immune function with a gentler ascorbate mineral complex
- Individuals maintaining daily vitamin C intake who experience stomach upset
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NOW Foods Buffered C-1000 Complex delivers 1,000 mg of vitamin C per serving in a buffered form, combining ascorbic acid with calcium, magnesium, and potassium ascorbates, to support immune function, antioxidant activity, and collagen synthesis. The buffered format is designed for individuals with sensitive stomachs who find standard ascorbic acid difficult to tolerate.
Why It's Worth Considering: The mineral ascorbate blend neutralizes acidity without reducing potency, making higher-dose vitamin C more accessible for daily use. Each serving also contributes a modest amount of complementary minerals alongside the C complex.
Product details
Who it may suit
May be a fit for
- Adults seeking buffered vitamin C with reduced gastrointestinal sensitivity
- Those supporting immune function with a gentler ascorbate mineral complex
- Individuals maintaining daily vitamin C intake who experience stomach upset
- People seeking high-dose 1000mg vitamin C with added mineral cofactors
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
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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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.