Mineral
Calcium (as Calcium AAC)
Also known as: Calcium amino acid chelate, Calcium AAC, Calcium chelate
Calcium is an essential mineral critical for bone health, muscle function, and nerve transmission. Calcium AAC is a chelated form designed for enhanced absorption.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Calcium (as Calcium AAC) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Nutricost Calcium Citrate | 97 A | $0.28 |
| 2 | Thorne Protein Isolate - Chocolate | 96 A | $1.47 |
| 3 | Thorne Whey Protein Isolate - Vanilla | 96 A | $1.47 |
| 4 | NutraBio Whey Protein Isolate Powder | 96 A | $2.50 |
| 5 | Nutricost Calcium Citrate Powder | 95 A | $0.19 |
| 6 | Transparent Labs Grass-Fed Whey Protein Isolate | 95 A | $2.00 |
| 7 | Nutricost Calcium Citrate + Magnesium Citrate Powder | 94 A | $0.63 |
| 8 | Nutricost Calcium Citrate + Vitamin D | 93 A | $0.30 |
| 9 | Nutricost Calcium + Vitamin D3 Tablets | 92 A | $0.15 |
| 10 | Pure Encapsulations Calcium K/D | 92 A | $0.53 |
| 11 | Pure Encapsulations Calcium Magnesium (citrate/malate) | 92 A | $0.62 |
| 12 | Pure Encapsulations Calcium Magnesium (citrate) | 92 A | $0.57 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Calcium (as Calcium AAC) should I take?
The typical range is 800-1200 mg daily. Long-term use recommended for bone health maintenance
When should I take Calcium (as Calcium AAC)?
Divided doses with meals for optimal absorption. With food to enhance absorption.
Which form of Calcium (as Calcium AAC) is best?
Chelate (amino acid complex). Other forms in the catalog: Carbonate, Citrate.
Is Calcium (as Calcium AAC) safe?
Commonly reported: Constipation, Bloating, Nausea (at high doses).
Which Calcium (as Calcium AAC) supplement scores highest?
Nutricost Calcium Citrate, at 97/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Bone health
- Muscle function
- Nerve transmission
- Cardiovascular health
How it works
- Structural component of bone and teeth
- Cofactor for muscle contraction
- Regulates neurotransmitter release
Dosage
- Typical range
- 800-1200 mg daily
- Timing
- Divided doses with meals for optimal absorption
- With food
- With food to enhance absorption
- Duration
- Long-term use recommended for bone health maintenance
- Special populations
- Postmenopausal women and older adults may benefit from higher intake; adolescents need 1300 mg daily
Forms
- Chelate (amino acid complex)· 70/100
- Carbonate· 70/100
- Citrate· 70/100
Safety
Common side effects
- Constipation
- Bloating
- Nausea (at high doses)
Contraindications
- Hypercalcemia
- Parathyroid disease
- Kidney stones (history)
Products containing Calcium (as Calcium AAC)
Top-scoring supplements in our catalog that list Calcium (as Calcium AAC) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Calcium supplementation has strong RCT evidence for bone health and fracture prevention, particularly in postmenopausal women and older adults. Chelated forms show improved bioavailability compared to some traditional forms.
Grade A: Multiple well-designed human trials support the main claims.
Related in Mineral
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.