Best Immune Support Collagen Supplements in 2025

Highest potency: Provides 5, 000 IU of Vitamin D3 per serving, the daily requirement recommended by the Vitamin D Council to restore depleted vitamin D levels in adults with minimal sun exposure.*

Most active form: NatureWise Vitamin D3 gives you the same natural, biologically active form of Vitamin D that your body produces naturally from sunlight — but without the risky UVB exposure.

Superior absorption: Vitamin D is a fat-soluble vitamin that requires dietary fat for the body to absorb it. Our best-selling Vitamin D3 is delivered in certified organic olive oil, a healthy fat source that improves bioavailability.

Immune support supplement: contains one 130 count bottle of Nature Made Vitamin C 500 mg Caplets with Rose Hips for a 130-day supply

These Nature Made Vitamin C caplets 500mg are Vitamin C supplements that help support immune health and offer antioxidant support

Vitamin C is necessary for the body to produce collagen, which helps support healthy skin

✔ Highest Available Vitamin C Formula – Nutrivein Liposomal Vitamin C enhanced formula contains 1650 mg of Liposomal Vitamin C per serving. With 180 vegetable capsules in each bottle for a full 90 day supply, our brand boasts the highest leading potency of Liposomal Vitamin C found on the market today. Utilizing the phospholipid sunflower lecithin to create liposomes helps the body more effectively absorb the vitamin C in our complex. Phosphatidylcholine helps to ensure superior absorption.

✔ Immune System Support & Fat Soluble Vitamin C – Our vitamin c supplement is supportive of the immune system. Avoid having to take sick days off from work by taking these pills daily as a defense against getting sick. Our powerful combination of sunflower phospholipids (building blocks of cell membranes) and Vitamin C, creates the best antioxidant supplements that neutralize harmful free radicals caused by stress.

✔ Groundbreaking Health Benefits - Vitamin C (ascorbic acid) contains powerful antioxidant properties & helps protect against free radical damage. It supports the immune system, supports healthy brain function & cognition, supports blood circulation, helps improve mood, contains anti-aging properties such as minimizing wrinkles, supports bone density, helps decrease muscle soreness, and helps increase absorption of calcium & iron.

Highest Quality vitamins and supplements since 1973

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Antioxidant supplement

B COMPLEX VITAMINS FOR WOMEN AND MEN: Our high potency vitamin B complex supports energy, metabolism and immune system health as well as a healthy response to stress with B vitamins, Raw Organic fruits and vegetables as well as raw probiotics & enzymes

ENERGY SUPPLEMENT: High potencies of 8 whole food complexed B vitamins to support mental & physical energy―thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), B6, biotin (B7), folate (B9, no synthetic folic acid) & B12 (as Methylcobalamin)

HEART HEALTH: Our B Complex vitamin supplement is whole food nutrition with 133 mcg of vitamin B-12 (5542% DV), 450 mcg DFE of folate (113% DV) and 10mg of vitamin B6 (588% DV) for heart & blood health—plus 325 mcg of biotin (1083% DV), fruits & veggies

Bundle & Save: Our top selling immunity products are now a bundle! Vegan Liquid Zinc Sulfate by MaryRuth's 4oz | Organic Glycerin + Ionic Zinc Supplement, Provides Immune Support, 4oz | Megadose Vitamin C Liposomal by MaryRuth's (Citrus + Vanilla) 500mg, Enhanced Absorption Liquid Vitamin C, Immune Health Supplement, Vegan, Gluten Free, Sugar Free, Non-GMO, 7.6oz.

Ionic Zinc Liquid Drops: Zinc is an essential mineral, meaning that it’s necessary for health, but the human body is unable to synthesize it! The optimal concentration of zinc in the body is necessary for healthy immune function, and homeostasis of this mineral plays a role in supporting the health of your body’s macrophages, an important component of your innate immune system.

Megadose Vitamin C Liposomal: Vitamin C is an essential vitamin that our body cannot produce on its own. It is known for limiting the damage done by free radicals while supporting immune function and overall well-being. As a vitamin that supports immune function, as well as an essential cofactor in the synthesis of collagen.

Nature's Way Probiotic Pearls for Women is a daily probiotic for women to help support vaginal flora and urinary tract health with 1 billion live probiotic cultures.*

Pearls Women’s helps maintain vaginal and urinary tract health and supports digestive balance and immune health with active Lactobacilli cultures.* Triple-layer coating helps them survive their journey to your small intestine where they're needed most.

Women take 1 softgel daily. Small probiotic pearls are easy to swallow and conveniently sized to take anywhere and everywhere, with no refrigeration required.

ANTIOXIDANT SUPPORT: Sports Research quercetin supplement supports antioxidant activity and seasonal immune system function. Just one (1) of our softgels provide 500 mg of quercetin, promoting antioxidant activity and an immunity health support.

CARDIOVASCULAR SUPPORT: This quercetin supplement helps support the cardiovascular system and provides heart health support.

PREMIUM INGREDIENTS: Quercetin is a polyphenolic bioflavonoid and our Quercetin capsules are the most bioavailable form there is. It’s sourced from Brazilian fava trees, then formulated with Coconut MCT Oil and Sunflower Lecithin to help aid with absorption. It is also standardized to 95% quercetin powder in the dihydrate form.

Well-Retained; The Vitamin C metabolites in Ester-C positively impact retention of Vitamin C in cells; This complex yields beneficial antioxidant and immune system support; Includes natural bioflavonoids, acerola berry, and rose hips fruit powder

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Unique Formula; Special manufacturing process creates a unique calcium ascorbate metabolite complex; Less acidic, pH neutral Vitamin C for sensitive stomachs; Easy to digest, highly-absorbable

Immune Health: May help support healthy immune function & glutathione production, an antioxidant

Vibrant Skin & Hair: Formulated w/ Rose Hips, Acerola & Bioflavonoids to support skin & hair health

More C Support: May help support collagen synthesis, strong bones, blood vessel integrity & more

Your Immune C: Special complex supplies 1000 mg of vitamin C from rose hips and acerola, plus our bioflavonoid concentrate, intended to support healthy immune system function and glutathione antioxidant production in the body.

All-Day Support: Our two-stage time release technology is designed to release half the Vitamin C rapidly & half gradually** throughout the day, which may help extend the availability of vit. C to the body over a longer period of time.

Big C Benefits: This powerful antioxidant may also help support collagen synthesis, cartilage and bone development, capillary and blood vessel integrity, nerve impulse transmission and skin health. Plus a base of calcium and magnesium makes our buffered vitamin C easier on the stomach.

Immune Support; Solgar Vitamin C 1000 mg helps support a healthy immune system; It also plays an essential role in the functioning of white blood cells which are vital components of the immune system

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Powerful Antioxidant; Vitamin C helps fight free radicals, which can lead to oxidative stress and the premature aging of cells

Toddler Vitamin C Drops: Support your toddler’s immune system and overall health & wellness with our liquid organic Vitamin C. Vitamin C is considered an essential vitamin for everyone, as our bodies cannot synthesize it on its own. Our organic Vitamin C Liquid Drops come from PurC Vitamin C (from organic amla fruit extract), which has been found to contain higher levels of Vitamin C than other citrus fruits.

Essential Vitamin: Vitamin C’s antioxidant properties are vital for your body, limiting the damage done by free radicals while supporting immune function and overall well-being. Other benefits include maintenance of heart health and as an essential cofactor in the synthesis of collagen, a protein vital to the health of multiple parts of the body including blood vessels, bones, and skin!

Vegan Formula: Per Serving (30 Drops): 15 mg PurC Vitamin C (from organic amla fruit extract) (Phyllanthus emblica). Other Ingredients: Organic Non-GMO Vegan Glycerin, Purified Water, Organic Non-GMO Vegan Natural Orange Flavor, Non-GMO Vegan Natural Vanilla Flavor. Each bottle comes with 30-60 servings.

The Ultimate Immune System Booster - Boost your immunity with ForestLeaf liposomal Vitamin C capsules. Forestleaf vitamin c capsules blend the powerful benefits of MCT oil and sunflower lecithin with dry vitamin c liposomal technology for maximum absorption.

Loaded with Vitamin C - Support your body year-round with our maximum potency vitamin c liposomal 1000mg. Just two capsules of Forestleaf liposomal vitamin c 1000mg a day help protect your body against harmful symptomatic and asymptomatic illness

Ditch Harmful Additives - Ask our thousands of happy customers how much they trust ForestLeaf vit c liposomal. ForestLeaf liposomal c is non-GMO, free of sugar, gluten, dairy, nuts, and soy, and preservative free. 120 vegetable capsules.

Optimal Absorption; Solgar Zinc Citrate contains the citrate form of zinc to help promote optimal absorption; The 30 mg of zinc in this formulation represents 273% of the recommended daily value

Immune Support; Zinc exerts antioxidant activity and can support a healthy immune system; It also supports cell growth and DNA formation, as well as normal taste and vision

Collagen Support; Zinc contributes to healthy skin, nails, and hair; It plays a role in the synthesis of collagen in bone tissue

POWERFUL IMMUNITY BOOSTER: our pure ascorbic acid tablets are an easily absorbable form of Vitamin C that serves to fortify your body’s immune system, helping you and your family stay healthy*

BE ACTIVE, STAY ACTIVE: a powerful antioxidant that supports the production of carnitine, collagen, and certain neurotransmitters, vital to supporting optimal energy production, healthy looking skin, tissue repair, and brain health*

ESSENTIAL ANTIOXIDANT: each 1 tablet serving supplies 1000 Mg of pure, pharmaceutical-grade vitamin C

Satisfying, non-GMO refreshment that offers up to 4,000 mg of Vitamin C, plus generous doses of l-lysine, bromelain and a 96% pure caffeine-free, green tea extract

Atypically potent high dose immune supportive formula. Excellent for those with sugar sensitivity.

Gentle on stomach - Supports a healthy immune system

✓ 50% MORE, ONE YEAR SUPPLY - At Purely Holistic we pride ourselves on two things; providing premium quality supplements, all at an amazing price. Our new Vitamin C Complex with sustained timed release delivery is no exception. Each bottle contains 365 vegan capsules which is on average 50% MORE servings per bottle than our competitors. One purchase will be enough to keep you in plentiful supply of vitamin C for a full year and takes away the hassle of reordering every couple of months.

✓ TIMED RELEASE DELIVERY OVER 12 HOURS - A common problem with taking a Vitamin C supplement is that you may not always reap its full benefits. Nutrients can be lost in urine when it’s delivered immediately. Our innovative formula has been designed to release half of the Vit C 1000mg rapidly and half over the following 12 hours. This method allows a sustained delivery which may help to improve its bioavailability for increased absorption as well as maintain optimal blood and tissue levels.

✓ 3-IN-1 FORMULATION - Our carefully considered formulation not only provides the health benefits of Vitamin C but also the antioxidant properties of bioflavonoids present in Acerola Cherry and Rosehip. The synergistic blend of the two natural sources of Vitamin C aids bioavailability and absorption as well as supporting healthier skin and collagen synthesis. Our capsules are suitable for both vegetarians and vegans and contain no GMO ingredients, artificial flavors or colorings.

IMMUNE HEALTH — The zinc in this powerful 3-in-1 formula helps support the immune system(3)

CALM, RELAXED MOOD — Magnesium is involved in nerve impulses and supports a calm, relaxed mood(3)

STRONG BONES, TEETH, JOINTS — Calcium, magnesium and zinc form the building blocks that keep your bones, teeth and joints working properly

✔️One of Essential Vitamins - Vitamin C is one of the essential daily vitamins for daily intake. Our Ascorbic Acid powder is a great souce of Vitaminc C amd it's rich in antioxidants for overall wellness.* Take our Ascorbic Acid powder, which is pure and gluten free, for daily vitamin intake!

🟠 Boosts Immune Health - Our Ascorbic Acid, or Vitamin C, is the perfect way to help boost your immune health!* Ascorbic acid, or Vitamin C supplement, is a powerful antioxidant that helps protect your body from free radicals. It's a great way to keep your immune system strong and healthy.* Our Ascorbic Acid powder is also a great way to get that extra energy you need to make it through the day.

✔️ Supports Vibrant & Healthy Skin - Vitamin C, or ascorbic acid, is essential for collagen, which provides support to this important protein.* This Vitamin C supplement helps keep the skin healthy and maintains it's elasticity, as well as the joints.* Our Ascorbic acid powder, is the most bioavailable form of Vitamin C, meaning your body can use it more effectively!

Wound Healing: Supports the healing of unhealthy skin by promoting collagen formation

Immune Health: Lysine’s nutritional support helps the body maintain its natural defenses and promotes healthy gum and lip tissues

Skin And Bone Health: Promotes collagen formation for healthy and elastic skin, while also promoting calcium absorption for strong bones and teeth

SUPPORTS WOUND HEALING: Provides essential nutrients clinically shown to support wound healing by enhancing collagen production in as little as 2 weeks

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AMINO ACIDS: Contains arginine to promote nutrient-rich blood flow, and glutamine to help the body build new tissue

✔️ Essential Immune Support Supplement* – Protect yourself all season long with our specially formulated vitamin C capsules.* Complementing fruit extracts like citrus bioflavonoids and rose hips provide sources of vitamin C and help provide daily immunity support.*

✔️ Features Non-GMO Vitamin C – Our vitamin C is made with Non-GMO Quali-C from Scotland, one of the world’s leading providers of vitamin C. Each batch is third-party tested for quality, providing 1000 mg of vitamin C with bioflavonoids and rose hips per serving.

✔️ Helps Fight Free Radicals* – Our vitamin C supplement is the trifecta for daily antioxidant action.* Our blend of vitamin C from ascorbic acid, citrus bioflavonoids and rose hips, help protect cells against free radicals to keep cells thriving.*

FIGHT OXIDATIVE STRESS – Vitamin C helps fight oxidizing free radicals, which is good for you from your head to your toes. Quercetin does too—the only problem is absorption.Our quercetin is wrapped in a phytosome, which makes it 50 times more bioavailable than traditional quercetin.

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ENCOURAGE HEALTHY IMMUNE FUNCTION - Quercetin and vitamin C both promote immune health: in a randomized clinical trial, quercetin encouraged a healthy immune response in physically fit older adults—and we all know how much immune challenges want a taste of 1000 mg of vitamin C.

Premium Vitamin C - On your search for a truly high quality vitamin C, steer clear of low-quality “proprietary blends”. NutraChamps’ naturally sourced, vegan, non-GMO Vitamin C supplement comes in convenient, easy to swallow capsules so that you don’t need to guzzle down sugar-rich juices to get your dose of this essential nutrient.

"C" the Difference - NutraChamps’ premium formula didn’t just include L-Ascorbic Acid, the naturally occurring form of Vitamin C. Loaded with Elderberry, Citrus Bioflavonoids & Rose Hips, NutraChamps also delivers key antioxidant essentials to ensure you get more out of every dose.

Collagen & Beauty Benefits - Collagen is vital in ensuring the health of our hair, skin, nails, joints and connective tissue — but without the right amount of Vitamin C, the body can’t actually produce or store collagen. This makes taking the right dose SO important. With NutraChamps, you’ll get the doctor recommended dose and exactly what your body needs to thrive.

This well-tolerated vitamin C formula supports a healthy immune system and helps maintain healthy skin, collagen and connective tissues*

An excellent source of antioxidant support, Buffered Vitamin C uses ascorbic acid to supply one gram of vitamin C in each capsule*

Gluten free, soy free, dairy free and vegan

Year Round Support: This ideal formulation combines 500 mg of quercetin, 50 mg of bromelain & 1,235 mg of vitamin C to help support healthy immune function and your body’s ability to cope during seasonal changes.

Perfect Pair: While bromelain is believed to help enhance the body’s ability to utilize quercetin, both may help enhance the antioxidant activity of the other.

Big Boost: Our formula is especially designed to help support healthy sinus and respiratory function, collagen synthesis, cardiovascular health, cartilage and bone development, and nerve impulse transmission

GNC Vitamin C 1000 mg - Timed-Release If you’re looking for a convenient way to receive the benefits of immune support, you can add GNC Vitamin C 1,000 mg to your daily dietary supplement regimen. This protective antioxidant is essential for healthy bones, teeth, blood vessels and collagen. Plus, these vegetarian caplets also contain bioflavonoids and rose hips, all woven within a timed-release formula. Protective antioxidant vitamin provides immune support*

Dietary supplement contains 1,000mg of vitamin C, 25mg of citrus bioflavonoids complex 4:1 and rose hips powder per serving

Vitamin C with citrus extract flavonoids may have better absorption and retention in the body

Supports and promotes normal immune system response function

Promotes vascular integrity through support of the body’s natural collagen-synthesis processes

Supports healthy bone tissue and adrenal glands

Vitamin C: Promotes optimal immune function and provides the highest amount of vitamin C in Thorne’s vitamin C suite

Healthy Skin: Promotes collagen production, which enhances skin, nail, and hair health

Wound Healing: Collagen production, antioxidative properties, and immune support make vitamin C an important nutrient for supporting post-surgical healing and injury repair