Calcium
2 brands compared · cheapest first
Life ExtensionBest value
Calcium Citrate with Vitamin D
200 mg elemental calcium + 200 IU D3 · 200 capsules
$21.00for 200 doses
$0.105per dose
$0.000525 / mg
Best value. Bone Restore with K2 (B009E9YK90, $17.97/120 caps) is the more complete bone-stack option (calcium + D3 + K2 + minerals).
Pure Encapsulations
Calcium (Citrate)
150 mg elemental calcium · 180 capsules
$32.50for 180 doses
$0.181per dose
$0.0012 / mg
Citrate form (better absorbed than carbonate, no need for stomach acid).
Note
Thorne doesn't carry standalone calcium (it's in their Basic Bone Nutrients formula).