Doctor's Best Vitamin C Powder with Q-C
- Vitamin C
- Powder
- Vitamin C
- 8.8 ounces
An unflavored vitamin C and quercetin powder for buyers who want dose flexibility over the convenience of pre-measured capsules.
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How it ranks among the 88 vitamin c we track
4.6★ across 2,300 Amazon ratings, Bayesian-smoothed toward the category average.
2,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
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: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Doctor's Best Vitamin C Powder combines vitamin C with Q-C, quercetin, in an unflavored 8.8-ounce powder, marketed for immune, brain, eye, heart and joint support.
Powdered vitamin C lets buyers scale their own dose by the scoop rather than being locked into a fixed capsule amount, which is the main reason people choose powder over tablets. The Scotland-sourced claim on the label refers to the raw ascorbic acid's origin rather than to any other finished-product claim beyond that.
- 8.8 ounces (250g) of powder
- Vitamin C with Q-C, quercetin
- Unflavored
- Gluten free, soy free
Who it's for
Fits people who want to control their own vitamin C dose or add it to a drink rather than swallow capsules, and who don't mind an unflavored powder that carries vitamin C's natural tartness on its own.
Strengths and trade-offs
Drawn from this product's published specifications.
- Powder allows a flexible, scoop-based dose
- Combines vitamin C with quercetin
- Gluten free and soy free
- Unflavored, carries vitamin C's natural tartness
- No reviews to confirm mixability or taste
Performance notes
Quercetin is paired with the vitamin C here because the two are commonly combined for immune support, with quercetin working alongside rather than replacing the vitamin C dose. Being unflavored means nothing masks the powder's natural sourness when mixed into water.
Specifications
| Brand | Doctor's |
|---|---|
| Model | DRB-00333 |
| Form | Powder |
| Supplement Type | Vitamin C |
| Count | 8.8 ounces |
| Flavor | Unflavored |
| Diet | Gluten Free |
| Benefits | Immune Support |
| Allergens | Gluten Free, Soy Free |
Other Doctor's vitamin c
How it compares
This product against the closest alternatives we track in vitamin c.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Doctor's Best Vitamin C Powder with Q-CThis product | 4.6 / 5 | 2,300 | 4.4 / 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 |
Similar vitamin c from other brands
Questions about the Doctor's DRB-00333
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What is Q-C in this product?
It's quercetin, combined with the vitamin C in the powder.
Is it flavored?
No, it's labeled unflavored.
Is it allergen-friendly?
It's labeled gluten free and soy free.