Bluebonnet

Buffered C Crystals

Product Quality

Overall evidence-based quality rating

How Product Quality is assessed

8.47Very Good

Price

$0.50/serving

Retail

$12.40

Container

25 servings

Serving

5 Grams

Brand Quality

8.79

Why this score

Testing practices

Lot Tested
Third-Party Lab Tested
Transparent Batch-Specific COAs
ISO 17025 Lab

Testing coverage

Identity
Purity
Potency
Heavy Metals
Raw Ingredient Testing

Certifications

NSF Certified
USDA Organic Certified

Manufacturing standards

cGMP Certified
Made in USA

Innovation

Clinically Studied Product

Active Ingredients

Vitamin C, Buffered
4100 mg
Calcium
375 mg
Ingredient research · Calcium
Calcium is an essential mineral that gives bones and teeth their structure and also enables muscle contraction and nerve signaling. Supplements are most useful for filling inadequate intake and, often alongside vitamin D, can help preserve bone mineral density and support fracture prevention in some higher-risk groups.
- Supports bone-mineral-density outcomes in studied healthy children and older women.
Top References
Effects of calcium supplementation on bone density in healthy children: meta-analysis of randomised controlled trials
The efficacy of calcium supplementation alone in elderly Thai women over a 2-year period: a randomized controlled trial

Ranking

Multimineral Products90%

Vegetarian Products91%

Inactive Ingredients

10 Ideal

NoneIdeal

These statements have not been evaluated by the Food and Drug Administration. Any products and informational content displayed on this page are not intended to diagnose, treat, cure, or prevent any disease.