Metagenics

Metagenics Ultra Potent-C 1000

Vitamin C
Tablet
Vitamin C
90

4.7/ 5 on Amazon847Amazon ratings2,000+bought last month4.3ProductDome score

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou want a buffered vitamin C tablet aimed at easier digestion.

A buffered, higher-potency vitamin C tablet built to be gentler on digestion than plain ascorbic acid, sold in a 90 tablet non-GMO, gluten free bottle.

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ProductDome scorecard

How it ranks among the 88 vitamin c we track

4.3/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.8★4.7

4.7★ across 847 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 3,530 ratings3.7

847 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score4.5

2,000+ bought on Amazon last month.

Data quality · 11% of score2.5

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 88 vitamin c we track - how the scorecard works · full vitamin c data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

A buffered vitamin C tablet from Metagenics, sold in a 90 count bottle and formulated non-GMO and gluten free. The buffering is what the label ties to stomach comfort, alongside standard immune and collagen formation support.

Buffering neutralizes some of the acidity found in plain ascorbic acid, which is the mechanism behind the stomach comfort claim rather than a separate added ingredient. This puts it in the practitioner-brand corner of the vitamin C market rather than a mass-market gummy or chewable line.

Buffered vitamin C tablet
90 count bottle
Non-GMO and gluten free
Marketed for immune and collagen support

Who it's for

Fits people who want a higher-potency vitamin C tablet but find plain ascorbic acid hard on the stomach. Not for anyone wanting a chewable, gummy or liquid vitamin C format.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Buffered formula aimed at reduced stomach irritation
Non-GMO and gluten free
90 tablets per bottle

What to check first

Tablet-only format, no chewable or liquid option

Performance notes

The buffering process is the functional difference from standard vitamin C tablets, intended to reduce the acidity that can otherwise irritate the stomach at higher doses.

Specifications

Brand	Metagenics
Model	U1000
Form	Tablet
Supplement Type	Vitamin C
Count	90
Flavor	Unflavored
Diet	Gluten Free
Benefits	Immune Support
Allergens	Gluten Free

How it compares

This product against the closest alternatives we track in vitamin c.

Product	Amazon rating	Ratings	ProductDome score
Metagenics Ultra Potent-C 1000This product	4.7 / 5	847	4.3 / 5
Emergen-C 1000mg Vitamin C Powder for Daily Immune Support Caffeine Free Vitamin C…Emergen-C	4.8 / 5	53,857	4.7 / 5
Nature's Bounty Vitamin C + Rose HipsNature’s	4.8 / 5	49,343	4.7 / 5
Nature Made Extra Strength Vitamin C 1000 mg TabletsNATURE	4.8 / 5	40,190	4.7 / 5
Nutricost Vitamin C with Rose Hips 1025mgNutricost	4.8 / 5	23,867	4.7 / 5

Frequently asked

Questions about the Metagenics U1000

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

Is Metagenics Ultra Potent-C buffered or plain ascorbic acid?

It is a buffered vitamin C formula, which is the detail behind its stomach comfort positioning.

How many tablets are in one bottle?

90 tablets.

Is it gluten free?

Yes, the label states gluten free and non-GMO.