Allergy Research Group

Buffered Vitamin C Capsules, 120 Capsules

120 Capsules

May be a fit for

  • Adults seeking buffered vitamin C with reduced gastrointestinal sensitivity
  • Practitioners supporting antioxidant status in acid-sensitive patient populations
  • Individuals maintaining immune function who experience discomfort with standard ascorbic acid
$18.99

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CapsulesFormat
120 CapsulesPack size
The essentials

A closer look.

Buffered Vitamin C Capsules from Allergy Research Group deliver ascorbic acid in a mineral-buffered form, typically combining calcium, magnesium, and potassium ascorbate, to support immune function, antioxidant defense, and connective tissue integrity with reduced gastrointestinal irritation compared to straight ascorbic acid. Designed for those with sensitive digestion who still require meaningful vitamin C intake.

Why It's Worth Considering: Allergy Research Group is a practitioner-focused brand with longstanding use in clinical settings; the buffered format allows higher doses to be better tolerated by individuals prone to GI discomfort from acidic supplements.

Allergy Research Group - Buffered Vitamin C Capsules, 120 CapsulesAllergy Research Group · 120 Capsules
Make it part of your day

Make it part of your routine.

As a dietary supplement, 2 capsules daily between meals, or as directed by a healthcare practitioner.

Important cautions & interactions
Warning: 
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.
Read the complete label
Inside the formula

Product details

Supplement facts & complete label

Serving Size:
2 capsules

Amount Per Serving:
Vitamin C ... 1g
(as Ascorbic Acid)
Calcium ... 190mg
(as Calcium Carbonate)
Magnesium ... 104mg
(as Magnesium Carbonate)

Other Ingredients:
Hydroxypropyl methylcellulose, silicon dioxide, microcrystalline cellulose, stearic acid, magnesium stearate.

Label directions

As a dietary supplement, 2 capsules daily between meals, or as directed by a healthcare practitioner.

Label cautions

Warning: 
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.

Source: authorized supplier original manufacturer label · September 06, 2026. Formulas and labels can change. Check the packaging you receive.

Who it may suit

May be a fit for

  • Adults seeking buffered vitamin C with reduced gastrointestinal sensitivity
  • Practitioners supporting antioxidant status in acid-sensitive patient populations
  • Individuals maintaining immune function who experience discomfort with standard ascorbic acid
  • Those requiring higher-dose vitamin C protocols with improved gastric tolerability

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

Iron
Vitamin C increases iron absorption
Collagen
Essential for collagen synthesis
Zinc
Both support immune function

Take Separately From

No significant interactions identified. Always consult your healthcare provider.

What to expect over time
Day 1–3

Plasma Saturation

Blood levels reach therapeutic range

Week 1–2

Immune Boost

Enhanced white blood cell function

Week 4–8

Collagen Support

Improved skin elasticity and wound healing

Month 2–3

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?

FeatureAscorbic AcidBuffered (Ascorbate)LiposomalEster-C
BioavailabilityGood (standard)Good (gentler)Excellent (2-3x)Good
GI ToleranceMay cause acidityVery gentleExcellentGentle
Best ForBudget, general useSensitive stomachsMaximum absorptionSustained release
Price$$$$$$$
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Good to know

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.

Allergy Research Group - Buffered Vitamin C Capsules, 120 Capsules