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Buffered C Powder

Thorne
4.6
★ ★ ★ ★ ★
(1312 ratings)
Magnesium 350 mg
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Score93

A buffered Vitamin C powder with 350 mg of magnesium to support immunity and mineral balance.

How scoring works
Quantity:8 Ounce(s) • (42 servings)
Goals:
General Health
Cardiovascular Support
Heart Health
Stress Relief
Energy
Digestive Health
Bone Health
Testosterone Support

Score 93

A buffered Vitamin C powder with 350 mg of magnesium to support immunity and mineral balance.

How scoring works
$29.00($0.69 per serving)
iHerb
$ 29.00
Vitacost
$ 29.00
Vitacost
$ 29.00
Walmart
$ 29.00
iHerb
$ 29.00
Pure Formulas
$ 29.00
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Analysis

This powder provides a massive dose of Vitamin C in a buffered form, which is much gentler on the stomach than pure ascorbic acid. It uses magnesium ascorbate, which provides the mineral while also supporting your immune system.

By including calcium and potassium, it supports heart and bone health through multiple pathways. This is a great choice for someone who wants to combine their daily magnesium with a high-dose antioxidant support.

Pros

  • Massive dose of antioxidant Vitamin C
  • Buffered form is easy on the stomach
  • Includes calcium and potassium
  • Powder format allows for flexible dosing
  • Highly bioavailable ascorbate forms

Cons

  • High price point for a daily supplement
  • Primarily a C supplement, not just magnesium
  • The taste can be quite tart

Warnings

  • Very high Vitamin C doses can cause stomach upset
  • Check with a professional if you have kidney concerns

Nutrient quality

98 Highest impact

Buffered mineral ascorbates provide superior digestive tolerance for high-dose Vitamin C. Dosing of all components is robust and therapeutically relevant for multi-system support.

Ingredient transparency

100 Highest impact

Weights for all active ingredients and specific mineral sources are clearly disclosed on the label. Disclosure follows standard transparency practices for all included components.

Customer satisfaction

95 Highest impact

Consistent strong ratings from a large review pool indicate product reliability and effectiveness. Feedback suggests high acceptance of the buffered formula for digestive comfort.

Value for money

77 High impact

Cost per serving is high due to the high-purity buffered ingredients and specialized format. Value is good for those seeking maximum antioxidant and electrolyte support in one dose.

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Goals

General Health
Impact
Highest effect
A Goal FitA+ Strength of SupportA- CoverageA+ Formula Quality

High-dose Vitamin C combined with buffered minerals supports immune readiness and mineral balance. This powder formula is well aligned for managing physiological stress and systemic resilience.

Ascorbates of Calcium, Magnesium, and Potassium provide a gentler way to ingest significant levels of Vitamin C. These foundational minerals support enzymatic function and cellular hydration alongside antioxidant protection.

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Cardiovascular Support
Impact
Highest effect
A Goal FitA Strength of SupportB- CoverageA+ Formula Quality

Magnesium ascorbate provides an absorbable form of this mineral to support healthy heart rhythm and blood vessel relaxation. Combined with a significant dose of vitamin C, these ingredients may contribute to vascular structural integrity.

This buffered powder also includes calcium and potassium, which are important for maintaining electrolyte balance and healthy blood pressure. The clinical dose of magnesium appears well aligned with primary cardiovascular support needs.

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Heart Health
Impact
Highest effect
A- Goal FitA Strength of SupportB CoverageA Formula Quality

Magnesium, Potassium, and Vitamin C are provided in this buffered powder to support vascular health and antioxidant defense. The 350 mg dose of magnesium is excellent for supporting heart rhythm and blood pressure regulation.

Providing minerals in an ascorbate form ensures gentle delivery and additional antioxidant benefits for the cardiovascular system. This formula appears well aligned with goals for maintaining structural integrity and healthy circulation.

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Stress Relief
Impact
Highest effect
A- Goal FitA- Strength of SupportB- CoverageA Formula Quality

This selection provides a massive amount of Vitamin C paired with 350mg of magnesium to support the adrenal glands and relaxation. These nutrients appear well aligned with mitigating the physiological response to chronic daily pressure.

The powder format allows for a functional dose that can help maintain nutritional status during times of high demand. While focused on antioxidant and mineral foundations, it lacks adaptogens for more direct HPA-axis modulation.

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Energy
Impact
Highest effect
B+ Goal FitA Strength of SupportC- CoverageA- Formula Quality

Magnesium ascorbate and various mineral ascorbates are provided in a buffered powder to support metabolic processes and reduce fatigue. Magnesium is a vital cofactor for ATP synthesis, making this dose therapeutically relevant for energy support.

While the primary focus is Vitamin C, the inclusion of 350mg of magnesium provides significant support for cellular fuel utilization. The powder format allows for easy dosing and relatively efficient mineral absorption.

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Digestive Health
Impact
Highest effect
B Goal FitB+ Strength of SupportB- CoverageA Formula Quality

This buffered powder provides high-dose vitamin C alongside magnesium and calcium ascorbates. These ingredients may contribute to improved gastrointestinal comfort and more regular bowel function as a secondary benefit to antioxidant support.

Ingredients such as magnesium ascorbate provide a gentle source of the mineral while buffering the acidity of the vitamin C. This combination is likely well-tolerated by those with sensitive digestion seeking regular motility support.

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Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 2.35 Gram(s)
Calcium (Ascorbic Acid, Calcium Ascorbate)
 350 mg
Magnesium (Magnesium Ascorbate)
 350 mg
Potassium (Potassium Ascorbate)
 99 mg
Gluten Free Adults 18–50
Report overview
Magnesium (Magnesium Ascorbate) · 350 mg OverallScore64
D Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyD- Value
This buffered Vitamin C powder includes magnesium ascorbate to provide gentle mineral support. It is a specialized formula that balances multiple minerals, though its magnesium focus is secondary to its antioxidant content.
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