Best Kirkland Signature Vitamin C 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

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

JUST 1 CAPSULE A DAY: They say one is the loneliest number. But when it comes to our omega 3 fish oil supplements, it's all you need for the day. Just one softgel has 1,040 milligrams of Omega-3 with 690 mg of EPA & 260 mg of DHA in the triglyceride molecular form. Sourced exclusively from wild Alaskan Pollock, our fish oil liquid has more essential fatty acids per capsule than Krill, Flaxseed or Algae Oils.

HEAD, HEART & BEYOND: Nature has given us some amazing gifts. Like Omega-3 fatty acids. Found in fish oil, these nutrients (also known as EPA and DHA) may help support cardiovascular health, brain function and the immune system - and our triple strength Omega-3 Powerhouse supplements are packed with them.

GOOD RIDDANCE, FISH BURPS: Our burpless fish oil, one-a-day Omega-3 fatty acid supplements go down without the aftertaste of some lower quality capsules due to our 10-step oil refinement process where oxygen is kept away throughout the entire process to ensure the utmost freshness and quality. Pescatarian friendly, non-GMO verified, hexane, soy and gluten free.

OMEGA 3 FATTY ACIDS: MAV Fish Oil contains unique essential fats including EPA and DHA known to decrease inflammation and support overall health and wellness.* Our formula contains more EPA and DHA per serving than competing brands.

NATURALLY SOURCED, PREMIUM SERIES: Omega 3 fatty acids are widely considered one of the most crucial supplements you can put in your body.* Our Premium Series Omega-3 Fish Oil is 100% natural and pure with no additives. One serving contains 3600mg of Fish Oil, including 864mg of DHA and 1296mg of EPA per serving.

PURE SEA-HARVESTED PELAGIC FISH OIL: Get all the health benefits of 100% pure Sea-Harvested fish oil. This Fish Oil Supplement supports brain health, healthy joints, mood, skin, hair, and more.*

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

The package weight of the product is 1 pounds

The package dimension of the product is 6"L x 5"W x 4"H

Country of origin is United States

Vitamin C enhances the immune system

Rose hips are a natural source of vitamin C

500 Tablets

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

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.

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)

✔️ TRIPLE STRENGTH OMEGA-3 ACTION - Our fish oil delivers 3X the omega-3s compared to what you get with some other fish oil supplements. Each daily serving of 2 softgels provides 2,200 mg of fish oil, including 1,400 mg of EPA and 480 mg of DHA.

✔️ OMEGA-3 for HEART, EYE, BRAIN, SKIN & EYE HEALTH* - Science has shown that not only do the omega-3s in fish oil offer cardiovascular support for men and women, but they also promote brain health, and help keep your skin and eyes healthy as you age.*

✔️ NO FISHY AFTERTASTE - There’s nothing worse than the fishy aftertaste left by lower-quality fish oils. Our omega-3 supplement is highly concentrated to give you clean, high quality oil with no fishy burps or aftertaste.

Proprietary, patented vitamin C formula that features a buffered delivery system designed to help prevent the potential stomach upset sometimes associated with high vitamin C intake*

Supports healthy immune function and is a good source of antioxidants from vitamin C*

Each tablet contains 1,000 mg vitamin C

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.

FISH OIL OMEGA 3 - OMEGA 6 - Supports Heart, Brain & Joint Health our 2500mg highly concentrated EPA and DHA supplement provides the best overall health support for men, women, and kids. Omega 3 Fish Oil softgels work to support heart health, joint support, brain health, weight loss, chronic skin issues, and help lower cholesterol and blood pressure with a powerful combination of EPA and DHA packed into every serving

DHA & EPA Omegas - Healthy Heart & Metabolism Omega 3 fatty acids, like those in NEW AGE Fish Oil, are considered “good” fats important for cellular health, heart health, and metabolic health and can help maintain triglyceride levels already within a normal range.

High Quality, Pure Fish Oil, Made in the USA: Our Omega 3 fish oil supplements are tested rigorously by a 3rd party and purified to ensure maximum freshness, safety and superior quality. We’re proud to say that our sustainably sourced, burpless fish oil is completely free of heavy metals, mercury, toxins and other contaminants and delivers only the purest form of EPA and DHA Omega 3s.

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

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.

Convenient 2 bottles with 1000 mg Vitamin-C derived from Tapioca

80 day supply using the recommended daily dosage of 3 capsules

Ecological Formulas C-1000 is formulated for those who are sensitive to citrus fruits and corn related foods. Unlike many other Vitamin C supplements, C-1000 is derived from Tapioca a non-corn source to reduce the chance of an upset stomach

Get our New AlgaeCal Bundle: Includes a bottle of our AlgaeCal Plus organic calcium supplement for women & men and a copy of the book by Lara Pizzorno: "Healthy Bones Healthy you". Whit this bundle, you will have all you need to start your journey toward Stronger Bones For Life.

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.

Added Vitamin D : We’ve enriched the pure red algae supplement powder with Vitamins C, D3, and K2, plus additional boron and magnesium. These added ingredients make sure the natural minerals in Algaecal Plus calcium supplement get to where it's needed, in your bones.

VITAMIN C SUPPLEMENT - Vitamin C is crucial in a variety of functions, particularly the support of the immune system and support of maintaining normal inflammatory balance.

VITAMIN C FOR IMMUNE SYSTEM SUPPORT - Vitamin C is a great immune system booster providing support to help manufacture collagen, the main structural protein of connective tissues in the human body.

VITAMIN C FOR CARDIOVASCULAR SUPPORT - Vitamin C helps support the formation of collagen which supports the cardiovascular system.