21st Century Calcium Citrate + D3 Maximum vs Bluebonnet Nutrition Calcium Citrate & Vitamin D3
Side-by-side supplement facts comparison
Calcium Citrate + D3 Maximum, 75 Tablets
Calcium Citrate is an easily absorbable form of Calcium, an important mineral for bone health. Vitamin D3 is added to assist with calcium absorption.

Calcium Citrate & Vitamin D3, 180 Caplets
Bluebonnet's Calcium Citrate & Vitamin D3 Caplets are formulated with calcium in a chelate of calcium citrate and vitamin D3 (cholecalciferol) from lanolin for strong, healthy bones.

At a Glance
Processing analysis…
Ingredient Comparison
Total mg Per Serving
Calcium Citrate + D3 Maximum, 75 Tablets
Calcium Citrate & Vitamin D3, 180 Caplets
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37 servings per container
45 servings per container

Calcium Citrate + D3 Maximum, 75 Tablets
21st Century · 2 Tablets
Calcium Citrate + D3 Maximum, 75 Tablets
21st Century · 2 Tablets
| Ingredient | Amount | DV |
|---|---|---|
Vitamin D3 (as Cholecalciferol) | 13 mcg (500 IU) | 63% |
Calcium (as Calcium Citrate) | 630 mg | 48% |
† Daily Value not established

Calcium Citrate & Vitamin D3, 180 Caplets
Bluebonnet Nutrition · 4 Caplets
Calcium Citrate & Vitamin D3, 180 Caplets
Bluebonnet Nutrition · 4 Caplets
| Ingredient | Amount | DV |
|---|---|---|
Vitamin D3 (as cholecalciferol) | 20 mcg (800 IU) | 100% |
Calcium (as calcium citrate) | 1000 mg | 77% |
† Daily Value not established
Other Ingredients Analysis
Analysis of inactive ingredients for dietary restrictions, allergens, and artificial additives.
Bluebonnet Nutrition Calcium Citrate & Vitamin D3, 180 Capletshas a cleaner “other ingredients” profile

Calcium Citrate + D3 Maximum, 75 Tablets
21st Century
Needs Review
Other Ingredients
Cellulose, stearic acid. Contains <2% of: BHA, BHT, croscarmellose sodium, gelatin, magnesium silicate, magnesium stearate, peg, polyvinyl alcohol, starch, sucrose, talc, titanium dioxide, vegetable oil, water.Concerns
Warnings
Positives

Calcium Citrate & Vitamin D3, 180 Caplets
Bluebonnet Nutrition
Excellent
Other Ingredients
Vegetable cellulose, stearic acid, silicon dioxide, vegetable magnesium stearate, vegetable glaze.Warnings
Positives
How Clean Score is Calculated
Serving Information
| Detail | Calcium Citrate + D3 Maximum, 75 Tablets | Calcium Citrate & Vitamin D3, 180 Caplets |
|---|---|---|
| Serving Size | 2 Tablets | 4 Caplets |
| Servings Per Container | 37 | 45 |
| Package Quantity | 75 count | 180 count |
Certifications & Claims
Calcium Citrate + D3 Maximum, 75 Tablets
Calcium Citrate & Vitamin D3, 180 Caplets