Best Carbonate Calcium Supplements of 2026

Defy bone aging with CITRACAL Slow Release 1200 Calcium Supplement, a sugar-free blend of 1200 mg of Calcium Carbonate and Citrate per serving that helps support bone health. This supplement also contains 1000 IU Vitamin D3 and 80 mg of magnesium per serving to absorb dietary calcium efficiently. The Slo-Cal Technology slowly and continuously releases small amounts of calcium and vitamin D3, making it easy to absorb and gentle on the stomach. Highly recommended by doctors and pharmacists, CITRACAL Slow Release 1200 is perfect for adults looking to achieve optimal bone health.

Nature's Bounty Calcium is a supplement that contains 600mg of calcium and 800IU of Vitamin D3 per serving. It helps build strong bones and is involved in proper muscle contraction impulse, which is useful for physical activities. It also supports neuromuscular health, making sure your nerves and muscles are working properly. Another great feature of this supplement is that it helps maintain a healthy immune system, which is essential for overall health. Nature's Bounty Calcium provides the convenience of an all-in-one supplement that can help you maintain a healthy lifestyle.

Caltrate Minis 600 Plus D3 Plus Minerals is a calcium and vitamin D3 supplement that supports bone strength and flexibility. This 150-count bottle contains key essential minerals like zinc, copper, and manganese to help support collagen production, which facilitates more resilient bones. With 600 mg calcium carbonate and 40 mcg of vitamin D3 per two mini tablets, it has the most vitamin D3 to help your body maximize calcium absorption. These bone supplements are 35% smaller than the leading small calcium supplement, making them easy to swallow. Take two tablets daily with food or as directed by a physician.

Caltrate Chewables 600 Plus D3 Plus Minerals Calcium and Vitamin D Supplement is a delicious way to support healthy bones and muscles. With 600 mg of concentrated calcium carbonate and 20 mcg of vitamin D3, each tablet contains the most vitamin D3 to help maximize calcium absorption, so you can enjoy stronger, healthier bones. Its formula also includes essential minerals such as zinc, copper, and manganese to help support collagen production for more flexible bones. These chewable tablets come in cherry, orange, and fruit punch flavors, making them perfect for on-the-go use. Take up to two tablets a day with food to meet your recommended daily calcium intake.

Life Extension Bone Restore with Vitamin K2 is a non-GMO, gluten-free calcium supplement that helps build strong bones and teeth. It contains bone-building vitamins D and K2, bone-healthy minerals like magnesium and zinc, and patented Fruitex B OsteoBoron. The ingredients are sourced from the finest raw materials, with purity and potency in mind. Manufactured in the USA, this product is certified non-GMO and gluten-free.

Citracal Slow Release 1200 is a calcium supplement that blends 1200 mg of Calcium Carbonate and Citrate per serving, along with 1000 IU vitamin D3 and 80 mg of magnesium. The Slo-Cal technology ensures efficient absorption in one daily dose. Citracal is recommended by doctors and pharmacists, and it is sugar-free.

Jarrow Formulas BoneUp is a comprehensive micronutrient formula that provides StimuCal MicroCrystalline HydroxyApatite (MCHA) and micronutrients to support bone health, density and skeletal nutrition. It includes natural sources of vitamins D3 and K2 (as MK-7) to support calcium deposition into bones. StimuCal MCHA is a natural source of calcium shown to support bone mineral density better than calcium carbonate; StimuCal also provides bone proteins, including type I collagen, which is shown to support bone health. The convenient capsules maximize absorption and should be taken 2 capsules 3 times per day with meals or as directed by a healthcare professional.