Best Vitamin C Supplements of 2025: Top Picks for Immune Health

Vitamin C, or ascorbic acid, is the cornerstone of immune health and is vitally essential for immunity and overall health. It is a powerful immunity supplement & antioxidant compound that improves collagen production and skin health and supports a healthy and robust immune system. Thus, it is a vital nutrient for overall health. 

Vitamin C products are in increasing demand due to their immune-boosting properties. However, not all vitamin C supplements are equal, and bioavailability, dosage, formulation, sourcing, and overall quality vary from product to product. This guide will explore the best vitamin C supplements for immune health and choose the top picks.  

These recommendations help you make a well-informed choice, whether you need a formula tailored to your specific needs or are looking for a supplement with a natural ingredient profile and more significant absorption. Let's have an overview of our selection.  

Best Vitamin C Supplements for Immune Health at a Glance

• Quicksilver Liposomal Vitamin C Supplement: It is a liquid vitamin C supplement that promises antioxidant support and improves immunity. £32.44 for 4 oz at Welzo.
• Lamberts Vitamin C Tablets with Bioflavonoids and Rose Hips: Each tablet of this vitamin has 1000mg of vitamin C and improves collagen production, skin health and immunity. £15.95 for 120 tablets at Welzo.
• Dr Mercola Liposomal Vitamin C Capsules: This Liposomal vitamin C supplement improves the daily intake of vitamin C and helps protect the immune system. £29.03 for 60 capsules at Welzo.
• Klaire Labs (SFI Health) Multivitamin Complex Capsules: This multivitamin complex by Klaire Labs has vitamin C and promises to improve vitamin intake & immune health. £21.54 for 60 capsules at Welzo.
• New Roots Herbal Vitamin C Plus Tablets: This vitamin supplement by New Roots Herbal improves absorption and has sustained release abilities for better immune support. £22.93 for 60 tablets at Welzo.
• Nutri Advanced Vitamin C Time Release Tablets: This vitamin C supplement by Nutri Advance has numerous immune-boosting abilities and is vital for overall health. £21.97 for 90 tablets at Welzo.
• Biocare Vitamin C Powder: This vitamin C powder by BioCare offers gentle and additive-free support to the immune system and is very promising for boosting overall wellness. £13.60 for 60g at Welzo.
• Natures Aid Vitamin C Time Release Tabs: This vitamin C supplement by Natures Aid promises antioxidants and adequate immune support, and it has sufficient vitamin C for this purpose. £8.60 for 90 tablets at Welzo.
• CanXida C-3K 3000 mg Vitamin C Powder With Bioflavonoids: C-3K Plus delivers a whooping 3000mg of vitamin C per serving and has flavonoids for superior immune system support. £70.01 for 202g at Welzo.
• Solaray Vitamin C Rose Hips & Acerola Veg Caps: This vitamin C supplement by Solaray has vitamin C & numerous other natural ingredients for adequate immune support that lasts 12 hours. £56.13 for 250 VegCaps at Welzo. 

Quicksilver Liposomal Vitamin C Supplement

Price & availability: £32.44 (buy Quicksilver Liposomal Vitamin C Supplement at Welzo)

Form & dosage: Liquid (5ml daily serving)

Miscellaneous ingredients: 1000mg calcium & 125mg sodium

User rating: 5/ 5 ( based on 78 reviews at Welzo)

Why do we choose it? This Liposomal Vitamin C Supplement by Quicksilver has 1000mg of vitamin C per serving and promises antioxidant and immune support. Its advanced liposomal formula ensures quick absorption, making it a superb choice for high-dose and effective vitamin C supplementation. 

Moreover, its absorption is very high, which makes it very beneficial for overall health. It has an ascorbate form of vitamin C, which is very gentle on the stomach and particularly suitable for those with digestive sensitivities. Besides vitamin C, it has phospholipids and sodium for even more benefits. Overall, it is an excellent choice for those with vitamin C deficiency.  

Lamberts Vitamin C Tablets with Bioflavonoids and Rose Hips

Price & availability: £15.95 (buy Lamberts Vitamin C Tablets with Bioflavonoids and Rose Hips at Welzo)

Form & dosage: Tablets/ 1000mg

Miscellaneous ingredients: Citrus bioflavonoid complex, stearic acid, cellulose, hydroxypropyl methylcellulose, silicon dioxide & magnesium stearate.

User rating: 5/ 5 ( based on 148 reviews at Welzo)

Why do we choose it?: Lamberts® Vitamin C 1000mg Tablets are a great choice to boost overall and remarkably immune health. It has rose hips and flavonoids that improve immune health, skin health and collagen production. The rose hips offer antioxidant support, while flavonoids improve vitamin C absorption. 

It is very affordable and available in large packs for greater cost-effectiveness. Its formula has high-quality ingredients for quick digestion and absorption. This product by Lambert's is thus an effective and convenient option for fulfilling vitamin C needs and improving immunity. Therefore, buy it to achieve its full range of health benefits.

Dr Mercola Liposomal Vitamin C Capsules

Price & availability: £29.03 (buy Dr Mercola Liposomal Vitamin C Capsules at Welzo)

Form & dosage: Capsules/ 1000mg

Miscellaneous ingredients: Sunflower lecithin, capsule, beeswax, medium chain triglycerides & paprika extract.

User rating: 5/ 5 ( based on 92 reviews at Welzo)

Why do we choose it? Dr. Mercola's Liposomal Vitamin C supplement is an advanced way to support immune health by fulfilling vitamin C requirements. This supplement has cutting-edge liposome technology for maximum bioavailability, and gastrointestinal and immune system protection. It is further fortified with phospholipids to enhance absorption, improve their formation in the stomach, and preserve this vitamin. 

It is available in Licaps® capsules and is the proud product of a trusted company with decades of expertise. This supplement is thus guaranteed to be more efficacious and quality. Still, users are advised to consult the packaging information for updated information on allergens and ingredient profiles.

Klaire Labs (SFI Health) Multivitamin Complex Capsules

Price & availability: £21.54 (buy Klaire Labs (SFI Health) Multivitamin Complex Capsules at Welzo)

Form & dosage: Capsules/ 120mg

Miscellaneous ingredients: Vegetarian capsule (hydroxypropyl methylcellulose, water), L-valine, L-leucine, and microcrystalline cellulose.

User rating: 5/ 5 ( based on 124 reviews at Welzo)

Why do we choose it?: Klaire Labs' Multivitamin Complex is an excellent dietary supplement for those who want to improve their vitamin C intake while avoiding unnecessary minerals. It has a hypoallergenic formula with 100-200% NRV of most vitamins and almost 300% NRV of B vitamins for overall well-being, immune health and high energy levels. 

It is available in a convenient capsule format and easily fits many people's daily routines. Furthermore, it is highly cost-effective, at £21.54 for 60 capsules. It is best for those with a busy lifestyle and promises various essential vitamins for vitality and health.

New Roots Herbal Vitamin C Plus Tablets

Price & availability: £22.93 (buy New Roots Herbal Vitamin C Plus Tablets at Welzo)

Form & dosage: Tablets/ 527mg 

Miscellaneous ingredients: Citrus bioflavonoids, rose hips, hydroxypropyl cellulose capsules, vegetable fatty acids, sodium carboxymethyl cellulose, silicon dioxide, magnesium salts of fatty acids & dicalcium phosphate

User rating: 5/ 5 ( based on 92 reviews at Welzo)

Why do we choose it? New Roots Herbal's Vitamin C Plus is a high-quality health supplement that is highly beneficial for those who want to improve their vitamin C intake. Each tablet contains 1000 mg of vitamin C and rosehip and flavonoids that work together to improve bioavailability and absorption. 

Its unique graded effect makes it an exceptional product. This effect ensures a slow and steady release of vitamin C over 4-8 hours and a long-lasting supply. Due to its affordable price tag, it is great value for money and very easy to add to the health routine. Overall, it is an effective and reliable vitamin C support supplement.

Nutri Advanced Vitamin C Time Release Tablets

Price & availability: £21.97 (buy Nutri Advanced Vitamin C Time Release Tablets at Welzo)

Form & dosage: Tablets/ 1000mg 

Miscellaneous ingredients: Calcium stearate, silicon dioxide, stearic acid & coating (food glaze). 

User rating: 5/ 5 ( based on 100 reviews at Welzo)

Why do we choose it?: Nutri Advanced's Vitamin C Time Release Tablets are one of the best supplements to boost immune health, as 1000mg of each tablet of this supplement has an abundance of bioflavonoids that provide antioxidant benefits and enhanced absorption. Moreover, its time-release formula ensures a slow delivery over many hours, making it a sustainable support choice. 

It is available at a low price tag and is thus a great value for money, boosting overall health maintenance. It is convenient, effective, and easily incorporated into daily routines. This supplement has high-quality ingredients that prioritize health and wellness and really make a difference.

Biocare Vitamin C Powder

Price & availability: £13.60 (buy Biocare Vitamin C Powder at Welzo)

Form & dosage: Powder/ 60g

Miscellaneous ingredients: N/ A

User rating: 5/ 5 ( based on 60 reviews at Welzo)

Why do we choose it?: Biocare's Vitamin C Powder is a highly effective and gentle dietary supplement to improve vitamin C intake. It has magnesium ascorbate, a form of vitamin C with lower acidity and is thus best for citrus intolerance and sensitive stomachs. It is produced using a freeze-drying production technique and is an additive-free and pure product for vegetarians. It is a highly absorbable form of magnesium and calcium and supports overall wellbeing by improving energy levels and immune health. 

Unlike the other forms of vitamin C, it preserves many essential minerals, e.g., potassium and calcium. It is a high value for money and a stomach-friendly and quality supplement for regular use.

Natures Aid Vitamin C Time Release Tabs

Price & availability: £8.60 (buy Nature Aid Vitamin C Time Release Tabs at Welzo)

Form & dosage: Tabs/ 1000mg

Miscellaneous ingredients: Dicalcium phosphate, citrus bioflavonoids, microcrystalline cellulose, hydroxypropylmethylcellulose, anticaking agents (vegetable source magnesium stearate & silicon dioxide),

User rating: 5/ 5 ( based on 98 reviews at Welzo)

Why do we choose it?: Nature's Aid Vitamin C 1000mg Time Release Tablets are a very effective and reliable supplement for overall health, particularly a healthy immune system. Each tablet of this supplement has 1000mg of Vitamin C using an advanced time-release technology to ensure slow absorption throughout the day. This supplement increases the benefits of vitamin C supplementation, e.g., healthy tissues, bones, and skin, improved collagen production and antioxidant support, and a far lower risk of stomach irritation. 

This supplement is highly suitable for vegans as it is free of allergens and artificial additives and has high-quality ingredients. It is highly affordable at just £8.60 for 90 tablets and has a three-month supply for skin health and immune support.

CanXida C-3K 3000 mg Vitamin C Powder With Bioflavonoids

Price & availability: £70.01 (buy CanXida C-3K 3000 mg Vitamin C Powder With Bioflavonoids at Welzo)

Form & dosage: Powder/ 3000 mg per serving 

Miscellaneous ingredients: Vitamin A, silicon dioxide, vitamin E, zinc, copper, natural flavour, sodium. Citric acid, rebaudioside A (from stevia leaf extract)

User rating: 5/ 5 ( based on 114 reviews at Welzo)

Why do we choose it?: C-3K Plus 3000mg Vitamin C Powder by CanXida is a game-changer formula for a healthy immune system. Eric Bakker N.D. designed it and boasts 1g citrus bioflavonoids and 3000mg vitamin C per dose. It offers excellent antioxidant and immune support. 

Moreover, this blend helps protect the body from diseases by ensuring optional nutrient absorption. Its flexible dosing schedule makes it highly suitable for year-long use and makes it a premium investment for overall well being. For best results, it is advised to consult a healthcare provider.

Solaray Vitamin C Rose Hips & Acerola Veg Caps

Price & availability: £56.13 (buy Solaray Vitamin C Rose Hips & Acerola Veg Caps at Welzo)

Form & dosage: Veg Caps/ 1000mg 

Miscellaneous ingredients: Vegetable cellulose capsule, magnesium stearate, cellulose, stearic acid & silica.

User rating: 5/ 5 ( based on 126 reviews at Welzo)

Why do we choose it?: Solaray Vitamin C with Rose Hips & Acerola is a premium health supplement for comprehensive immune support. Each 1,000mg VegCap of this supplement contains vitamin C derived from sun-grown rose hips and acerola cherry to ensure that it is sourced from a natural and effective source. Its two-stage, timed-release formula is effective for up to 12 hours of sustained benefits, making it ideal for long-lasting immune health. 

It is a vegan-friendly product crafted with high-quality ingredients, free from artificial additives, and comes in a convenient 250-capsule bottle. At £56.13, Solaray Vitamin C offers excellent value for money and is best for those seeking enhanced wellness and vitality. So, buy it today to avail all of its health benefits.

Frequently Asked Questions  

Which type of vitamin C is the best for the immune system? 

Vitamin C, or calcium ascorbate, is the most effective type of vitamin C. It reduces histamine levels, improving allergy symptoms and the immune system. 

What dosage of vitamin C is sufficient? 500mg or 1000mg? 

The standard recommendation is to take 250-500mg of vitamin C twice daily. However, a dose higher than 1000mg, particularly for children, requires consultation with a healthcare provider. It is a water-soluble vitamin and is safe in moderately higher doses.

How do you use vitamin C supplements for the best immunity? 

The best tool to improve immunity is to use both dietary supplements and diets containing vitamin C. Supplements must be used by people at risk of deficiency, e.g., people of advanced age. 

Which fruit is rich in vitamin C? 

Kakadu plum is one of the richest vitamin C sources, with 2300-3150 mg calcium per 100g serving (up to 7,000mg per 100g DW). It is known by various brands in various cultures and has the highest vitamin C content. 

How do you naturally boost the immune system? 

The best tips to naturally boost the immune system are to eat a well-balanced and healthy diet containing fat-free milk products, fruits, grains, lean proteins, and vegetables, improve physical activities, maintain a healthy and ideal weight, avoid excessive alcohol, and get plenty of healthy sleep. 

Is taking 1000mg of vitamin C daily fine? 

Yes, it is fine. The upper limit for adults is 2000mg per day. Daily dosages of 1000mg or lower are not likely to cause any severe health effects. 

Bottom-line 

The right vitamin C supplement is necessary to support overall health and immune system functioning. The best choices highlighted in this article have excellent dosages and superb absorption, boast a wealth of high-quality ingredients, and promise maximum health benefits to users. 

These supplements are available in many formulations, such as gummies, powders, and capsules, and are suitable for everyone. Investing in these vitamin C supplements is a very simple and effective way to maintain vitality and health throughout the year.