Oyster Shell Calcium 250 +D

Oyster Shell Calcium 250 +D and 17 near-identical products are sold under 13 different brand names — a near-twin Formula Twins cluster.

Product	Brand
Oyster Shell Calcium 250 +D	21st Century
Oyster Shell Calcium 500 +D	21st Century
Oyster Shell Calcium 500 +D Extra Vitamin D Value Size	21st Century
Calcium Citrate+D3	Equate
Calcium 500 mg & Vitamin D3 200 IU	Simply Supplements
Maximum Strength Calcium Citrate with Vitamin D3	TopCare
Calcium Citrate+D3	Equate
Coral Calcium 600 mg	Source Naturals
Calcium Citrate+D3 Petites	CVS Health
Calcium Citrate Regular Strength + D3	Walgreens
Calcium Citrate + D3	up&up
Calcium Citrate 400 mg with Vitamin D3 12.5 mcg (500 IU)	Solimo
Coral Calcium 600 mg	Source Naturals
Extra FlexiJoint Vegetarian Glucosamine Formula	CATALO
Fiber Choice Bone Health	Fiber Choice
Calcium 1200 mg + D3 10 mcg	Body Attack Sports Nutrition
Alive! Calcium 1,200 mg	Nature's Way
Alive! Calcium Bone Support 1,200 mg	Nature's Way