Best Kirkland Signature Calcium Supplements in 2026

VITAMIN C 500mg FOR ADULTS: Essential for growth and tissue repair, Vitamin C promotes vision health, periodontal health and collagen, bone and cartilage formation; Raw Vitamin C provides 500mg of Vitamin C along with naturally occurring bioflavonoids

IMMUNE SYSTEM & HEART HEALTH: RAW whole food vitamin C provides support for immune system health, healthy heart, healthy skin and eyes; 23 powdered and organically grown fruits and vegetables add supporting antioxidants, vitamins and nutrient cofactors

PROBIOTICS AND ENZYMES: Our plant based C vitamin formula includes a RAW Probiotic and Enzyme blend of live probiotics – L. bulgaricus and L. plantarum – and enzymes such as Lipase, Protease and Bromelain, to support healthy digestion

Immune, muscle, teeth and bone health support supplement: contains one 180 count bottle of Nature Made Vitamin D3 1000 IU (25 mcg) Softgels for a 180-day supply

Nature Made Vitamin D 1000 IU softgels support bone health, teeth health, muscle health, and provide immune support

These Vitamin D 1000IU softgels help improve calcium absorption and contain 25mcg of Vitamin D 3, the body’s preferred form of Vitamin D

USDA certified organic Vitamin D: Only products with USDA certified organic logo are truly organic!

High Quality Laboratory Tested: This Vitamin D3 contains the same Biological form of vitamin D produced by your body. Gluten free, soy free, wheat free and nut free

The sunshine vitamin: Helps to support teeth and bone health, provide immune support, and promote healthy muscle function.*

SUPPORTS BONE HEALTH (1): Nature's Bounty Calcium Plus Vitamin D3 has 1200 mg of calcium, the primary mineral which helps maintain bone strength and helps support neuromuscular health

WITH ADDED VITAMIN D3 1000 IU: Each softgel contains 1000 IU of vitamin D3 which helps with calcium absorption and immune support (1)

GLUTEN, DAIRY, AND WHEAT FREE: Nature's Bounty Calcium Plus Vitamin D3 rapid release softgels are gluten free, dairy free, wheat free, and contain no artificial flavors

HIGH STRENGTH, SUPER ABSORBABLE B complex vitamins including thiamine (B1), Riboflavin-5-phosphate (B2), Niacinamide (flush free Niacin - B3), Calcium D-pantothenate (B5), D-Biotin (B7) & Pyridoxal-5-Phosphate (Vit B6)

METHYLATED VITAMIN FORMS that the body utilises immediately: bioavailable folate as methylfolate & methylcobalamin (Vit B12) - no poorly absorbed cyanocobalamin

SUSTAINED RELEASE provides all-day nutrient coverage and twice daily dosing optimises B12 levels

Ester-c is a breakthrough patented Vitamin C Formula supported with naturally occurring metabolites

Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

Metabolites help enhance the absorption of Vitamin C by your white blood cells, an important part of your immune system

Glucosamine HCI 1500 mg.

MSM 1500 mg.

Supports Healthy Joints and Cartilage

DEFY BONE AGING: Citracal Maximum Plus is a sugar free calcium supplement, providing 650 mg of calcium per serving to help support bone health as part of your overall wellness and fitness regimen; just 2 caplets twice a day

IMPORTANCE OF CALCIUM: This essential mineral is needed for bone health; Maximum Plus is made with Calcium Citrate

MAXIMUM STRENGTH: Contains 650 mg of Calcium Citrate with 1000 IU of vitamin D3 per serving that helps absorb dietary calcium; also contains essential minerals – zinc, copper and manganese to support bone health

Citracal Slow Release 1200 is a sugar free calcium supplement; blending 1200 mg of Calcium Carbonate and Citrate per serving as part of your overall wellness and fitness regimen; just 2 caplets a day

Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

IMPORTANCE OF CALCIUM: Petites is made with Calcium Citrate.

Heart Health: Highly absorbable calcium, which supports cardiovascular health.*

Colon Health: Additionally, calcium has been associated with supporting colon health*

Bone Support: Calcium in the citrate forms are highly bioavailable calcium supplements, providing support for bone, cardiovascular and colon health.*

DEFY BONE AGING: Citracal Slow Release 1200 is a sugar free calcium supplement; blending 1200 mg of Calcium Carbonate and Citrate per serving to help support bone health as part of your overall wellness and fitness regimen; just 2 caplets a day

Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

IMPORTANCE OF CALCIUM: This essential mineral is needed for bone health; Slow Release 1200 is made with Calcium Carbonate and Citrate

150 count bottle of Caltrate Minis 600 Plus D3 Plus Minerals Calcium and Vitamin D Supplement Tablets

Dual benefit bone support supplements include calcium and vitamin D3 for bone strength and minerals for flexibility (2, 3)

Caltrate Plus Minerals supplement includes key essential minerals like zinc, copper and manganese to help support collagen production to facilitate more resilient bones (2)

Helps build strong bones

Involved in proper muscle contraction impulse

Helps support neuromuscular health

100 count bottle of Caltrate Gummy Bites 500 mg Calcium and Vitamin D Supplement in black cherry, strawberry and orange flavors

Calcium supplement that helps support healthy bones and muscles (1)

High levels of vitamin D3 in these bone health supplements help maximize calcium absorption and maintain healthy bones (1, 2)

Plant-based Nutrients: Made with Plant-Based, Whole Food nutrients for healthy bone support, including Calcium and Magnesium from Marine Algae, Vitamin D3 from Lichen, and Vitamin C from Organic Acerola Cherries.

Complete Formula: Includes 10 vitamins & minerals that work together to support healthy bone building and help maintain bone density,* including Vitamin D, K2, C, Zinc, Magnesium, Manganese, Potassium, Boron, and Silica.

Healthy Calcium Absorption: Vitamin D3, Magnesium, and Vitamin K2 are crucial co-factors that help your body to absorb and use calcium properly, so that it goes into your bones rather than your arteries and soft tissues.*

3-IN-1 BENEFITS: Supports bone density and normal bone creation, supports cardiovascular health, and healthy joint support*

ORGANIC CALCIUM: USDA Organic plant-based calcium from sustainably harvested Red Marine Algae that’s rich in bone-nourishing calcium plus magnesium and 70+ trace minerals*

FORMULATED FOR ABSORPTION: We believe the best calcium supplements are easily recognized and absorbed by the body, so ours is expertly formulated with Vitamin D3 for better absorption, Vitamin K2 to direct calcium to bones (where you need it most)

Plant Based Calcium Supplement : AlgaeCal is a natural red algae that is hand-harvested. This organic plant supplies all bone support minerals, including calcium, selenium, and magnesium. It is a natural calcium supplement with Vitamin D & K2 which supports fracture healing.

Red Algae Organic Calcium : Most calcium supplements are made from rocks, and don't contain all bone support minerals needed to increase bone density. AlgaeCal is a natural calcium supplement that contains ALL of the minerals like magnesium, vitamin D & K2 to make bones stronger.

Bone Strength Supplements : AlgaeCal is science backed by studies showing that the combination of vitamins and minerals in each serving can help support healthy bones for life. AlgaeCal is an organic calcium with vitamin D and K2 making it the perfect supplement for bone strength. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Calcium with Vitamin D3 Supplement: Our calcium supplements for women and men activate the matrix GLA protein to bind excess calcium & promote arterial flow & flexibility.

Superior Vegan Calcium Capsules: Our Vitamin D calcium supplements help intercept the formation of calcium in joints & artery walls. Also contains Vitamin K2 for absorption and B12 for brain and bone health.

Extra-Strength Calcium and Vitamin D3: A combination of Calcium 600 mg with Vitamin D3 and K2, plus a dose of 1000 mcg of vitamin B12 for natural support of all its holistic benefits.

Powerful Support: Calcium, magnesium and zinc are important minerals that help support healthy, strong bones and teeth, muscles and immune system function.

Potent: Each serving of Solaray Cal Mag Zinc contains 1000 mg of calcium, 500 mg of a powerful magnesium complex and is packed with 25 mg of zinc.

Easy-to-Swallow: Our Cal-Mag Zinc comes in easy-to-swallow vegcaps and our extra value size gives you more free capsules for your money.

One 100 count bottle of assorted fruit-flavored Benefiber Chewable Prebiotic Fiber Supplement Tablets for Digestive Health, Chewable Fiber Tablets

Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

Plant based fiber supplements packed into great-tasting chewable tablets to promote good digestive health (1)

Plant Based Calcium Supplement : AlgaeCal Plus is a Powerful plant based serving of 16 bone supporting nutrients. It’s sourced from a rare red algae that naturally contains all clinically supported bone building minerals, including magnesium, boron, copper, manganese, silicon, zinc, and more. It is a natural calcium supplement with Vitamin D & K2 which supports fracture healing.

Bone Health : Strontium Boost slows down the cells that eat-away at our old bone, and speeds-up the cells that build healthy new bone – resulting in stronger bones in less time. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Added Vitamin D : Along with the 13 clinically supported minerals for bone strength, we’ve included Vitamin K2, C, and D3, plus extra boron and magnesium, to complete the formula and ensure the natural minerals in Algaecal Plus calcium supplement get to where it's needed, in your bones.

【Highest Bioavailable Vitamin C】 Our enhanced formula contains 2000mg of Liposomal Vitamin C per serving. With 60ML in each bottle for a month supply, Liposomal Vitamin C provides the strongest immune support. The powerful combination of sunflower phospholipids (building blocks of cell membranes) and Vitamin C helps the body more effectively absorb the vitamin C in our complex.

【All in One Immune System Booster】 Our liquid vitamin c contains powerful antioxidant properties & helps protect against free radical damage. It shows great performace on helping boost the immune system for overall well-being and supports. Many of our customer also found out that it helped nourish and protect Skin & Hair. Take it daily, you will reach the best physical and mental condition.

【Designed for All People】We formulated the perfect daily dosage of each natural & precious ingredient to maximize effectiveness. Its powerful and safe dosage is friendly to both man & woman. Our liposomal vitamin c supplement is proven to be effective for cardiovascular & heart health and muscle soreness. Energy levels and mood will be naturally improved. In the meantime, our proprietary formulation can promotes collagen production and fights against aging signs.

8 DAILY GREENS: Apple gummies made from 8 super greens including Spinach, Wheatgrass, Kale, Blue Green Algae, Spirulina, Aloe Vera, Chlorella & Barley Grass

ENERGY & IMMUNITY : These real greens gummies provide natural energy, antioxidants & immune strength - an easy source of additional greens to your daily regimen

WORLD'S FIRST: The World's First real greens gummies; 4 gummies contain as much Vitamin B6 as 16 cups of Raw Spinach, Riboflavin as 10 cups of Cabbage, Pantothenic Acid as 8 cups of Broccoli, Zinc as 4 cups of Beet Greens & Vitamin C as 4 Kiwis

UCll Undenatured Type II Collagen, Boron, Hyaluronic Acid

Helps Preserve Joints and Maintain Cartilage

Helps Support Joint Mobility, Flexibility and Comfort

BOOST ENERGY LEVELS: A Polyphenol-rich superfood greens blend with 11 of the most powerful vegetable polyphenols to help boost your energy and refresh your skin.*

ENHANCE DIGESTION: Primal Plants includes Pectin, a powerful kind of dietary fiber that serves two roles in digestion: It feeds the healthy probiotics in your gut, and helps ease digestion. It may even help your body absorb vital nutrients like calcium more efficiently.*

IMPROVE MENTAL CLARITY AND FOCUS: The supplement contains nutrients like vitamin B6, which are important for brain health and can help improve mental clarity and focus. This can help you stay focused and productive throughout the day.*

PLANT BASED CALCIUM MAGNESIUM: We start with a scientifically validated and trademarked source of calcium/magnesium concentrated to 1000mg per serving. We then add plant based vitamins D3 and K2 for calcium assimilation and critical trace minerals like strontium and boron which help form the bone matrix. Altogether more than a dozen different supplements in one. We call this the ultimate Fusion for bone health!

SOURCE MATTERS MOST: This ultra-premium plant based calcium and magnesium supplement is made from a unique trademarked ingredient called Aquamin. Aquamin is a nutrient dense form of algae grown in the pristine nutrient rich waters off Iceland. Calcium and magnesium from Icelandic red algae is a higher quality source of these minerals that is more absorbable in your body. This allows you to take a smaller dose than you might with synthetic forms of calcium for easy digestion.

D3, K2, BORON & STRONTIUM: Bone growth is a complex process that requires many different nutrients. That’s why our formula contains over 12 different supplements in one. These include plant based vitamin D3 & vitamin K2, plus the minerals boron and strontium which all play a role in creating the bonds that form our bone matrix for optimal bone density and strength.

ENERGY BOOSTING - May helps to prevent disorders that can make people feel tired and weak

HEALTHY SKIN & NAILS - B12 plays a vital role in cell production and supports healthy hair, skin and nails

EASY TO USE - 12 pumps daily. Pump desired dose onto a spoon or directly on the tongue and consume. May be taken with food or on an empty stomach every day, preferably on the rise or before 2 PM. Best taken before 3 pm. B-12 provides the cells with natural energy, unlike caffeine. Cellular energy is natural energy required for an overall sense of wellbeing and better focus.

Plant Based Calcium Supplement : AlgaeCal is a natural red algae that is hand-harvested. This organic plant supplies all bone support minerals, including calcium, selenium, and magnesium. It is a natural calcium supplement with Vitamin D which supports fracture healing.

Red Algae Organic Calcium : Most calcium supplements are made from rocks, and don't contain all bone support minerals needed to increase bone density. AlgaeCal is a natural calcium supplement that contains ALL of the minerals like magnesium and vitamin D to make bones stronger.

Bone Health & Strength Supplement : AlgaeCal is science backed by studies showing that the combination of vitamins and minerals in each serving can help support healthy bones for life. AlgaeCal plant based calcium with vitamin D is the perfect supplement for bone strength.

ALL-IN-ONE FORMULA - Our Vegan Calcium is packed with 600mg of Elemental Calcium from sustainably sourced Red Algae. Contains Vitamin K2 and D3, Zinc, Manganese, and Boron.

VEGAN and NON-GMO - Sapling Algae Calcium is Vegan, Non-GMO, Gluten Free, No Colorants, and no Artificial Flavoring. Additionally, it is bottled and manufactured in the United States.

ONE BOTTLE, ONE TREE – We take the environment seriously. Thats why for each bottle we sell, one tree is planted.

TOP PICK BY VERYWELLHEALTH: selected as the top supplement for bone health by VeryWellHealth

STRONG, HEALTHY BONES: TheraCal D2000 contains 1000 mg of calcium (per 4 tablets), vitamin D3, vitamin K2 and other nutrients essential for promoting bone strength and overall bone health.*

OPTIMAL FORMULATION: TheraCal D2000 takes a multi-nutrient approach to bone health with 1000 mg of calcium citrate, 55 mcg (2,000 IU) of vitamin D3, 100 mcg of vitamin K2, 200 mg of magnesium, and 3 mg of boron. These ingredients are essential for good bone health and play an important role in calcium absorption.*