Redoxon (Vitamin C)

Vitamin C is one of the most widely recognised nutrients for supporting everyday health. Redoxon vitamin C 1000 mg effervescent tablets are a convenient daily vitamin supplement providing a full gram of ascorbic acid per tablet, dissolved in water for easy consumption. Vitamin C contributes to the normal function of the immune system, helps protect cells from oxidative stress as an antioxidant supplement, and supports the normal formation of collagen for skin health and overall wellness. Redoxon 1000 mg is available without a prescription and is suitable for adults looking to support their daily vitamin intake.

Redoxon is a trusted vitamin supplement brand from Bayer. Redoxon 1000 mg effervescent tablets each contain 1000 mg of ascorbic acid, the form of vitamin C used in supplements and medicines. Each tablet is dissolved in a glass of water before drinking, making it a pleasant tasting fizzy drink that provides a convenient way to take a daily vitamin C supplement.

Vitamin C (ascorbic acid) is an essential water soluble vitamin. The body cannot produce vitamin C itself and relies entirely on dietary intake and supplementation to meet its needs. Vitamin C is found naturally in a range of foods including citrus fruits, berries, kiwi fruit, tomatoes, peppers, and leafy green vegetables. However, many adults do not consistently reach the reference nutrient intake of 40 mg per day from diet alone, and some groups may benefit from higher intakes.

Redoxon 1000 mg provides a daily dose of 1000 mg of vitamin C, significantly above the reference nutrient intake. At this dose, Redoxon is positioned as a daily antioxidant supplement supporting immune function, skin health, and overall wellness rather than as a treatment for deficiency. The effervescent tablet format dissolves easily in water, making it straightforward to take as part of a daily routine.

Vitamin C supports the body through several distinct biological roles.

Immune Support

Vitamin C contributes to the normal function of the immune system, as recognised under UK nutrition and health claims regulations. It supports the production and function of white blood cells, including neutrophils and lymphocytes, which are the body's primary defence cells. Vitamin C also supports the physical barriers that protect the body from pathogens. Maintaining adequate vitamin C levels is associated with supporting normal immune function, particularly in people with low dietary intake.

Antioxidant Protection

Vitamin C is a potent antioxidant. It contributes to the protection of cells from oxidative stress, which is the process by which unstable molecules called free radicals can damage cell structures. Free radical damage accumulates over time through normal metabolism and is increased by factors such as smoking, pollution, and intense physical activity. As an antioxidant supplement, vitamin C helps to neutralise free radicals, supporting cellular health and overall wellness.

Collagen Formation and Skin Health

Vitamin C plays an essential role in the synthesis of collagen, the structural protein that provides strength and elasticity to skin, bones, cartilage, blood vessels, and other connective tissues. Vitamin C is required for the enzymatic processes that stabilise collagen molecules. It contributes to normal collagen formation for the normal function of skin, cartilage, and bones. This makes vitamin C an important nutrient for ongoing skin health and tissue maintenance.

Other Roles

Vitamin C also contributes to normal energy metabolism, helps reduce tiredness and fatigue, supports normal functioning of the nervous system, improves iron absorption from plant-based food sources, and contributes to normal psychological function. These are all authorised health claims for vitamin C under UK regulations.

Redoxon 1000 mg effervescent tablets are straightforward to take and require no water measuring or tablet cutting.

• Drop one tablet into a glass of water (approximately 200 ml).
• Allow the tablet to fully dissolve. This takes about a minute.
• Drink the solution immediately after it has dissolved.
• Take one tablet once daily.
• Take at a consistent time each day that suits your routine.
• Vitamin C is water soluble and can be taken with or without food.
• Do not take more than the recommended daily amount. Vitamin C is water soluble and excess amounts are excreted in urine, but very high doses can cause gastrointestinal side effects.
• Keep out of the reach of children.

Redoxon 1000 mg can be taken year-round as a daily vitamin supplement. If you are taking any prescription medicines, check with your pharmacist before starting any new supplement, as vitamin C at high doses can occasionally interact with certain medicines.

Redoxon Vitamin C 1000 mg Effervescent Tablets

Each tablet provides 1000 mg of ascorbic acid. The recommended adult dose is one tablet per day, dissolved in water. This provides 1250% of the Nutrient Reference Value (NRV) for vitamin C (which is 80 mg).

The European Food Safety Authority and UK authorities consider vitamin C to be safe at doses up to 1000 mg per day for adults. Doses above 1000 mg per day are not recommended and may increase the risk of gastrointestinal side effects.

Redoxon 1000 mg is intended for adults. For children, lower dose vitamin C supplements are more appropriate. Speak to a pharmacist or GP if supplementation is needed for a child.

Redoxon is not intended to diagnose, treat, cure, or prevent any disease. It is a vitamin supplement for daily nutrient support.

Vitamin C is well tolerated by most adults at the recommended dose of 1000 mg per day. Side effects are uncommon at this dose.

Possible Side Effects at High Doses

• Gastrointestinal discomfort, nausea, diarrhoea, or stomach cramps. These are more likely at very high doses (above 2000 mg per day) and are uncommon at the 1000 mg daily dose.
• Kidney stones: very high long term doses of vitamin C increase urinary oxalate excretion, which can increase the risk of kidney stones in susceptible individuals. If you have a history of kidney stones, particularly oxalate stones, speak to your GP before taking high dose vitamin C supplements.

Special Considerations

• Patients with haemochromatosis (iron overload disorder): vitamin C increases iron absorption. Patients with haemochromatosis should speak to their GP before taking high dose vitamin C supplements.
• Patients with glucose-6-phosphate dehydrogenase (G6PD) deficiency: very high doses of vitamin C may cause haemolysis in G6PD-deficient individuals. Speak to your GP if you have this condition.
• Patients with kidney disease or a history of kidney stones should consult their GP before taking high dose vitamin C.

If you experience any persistent or unexpected symptoms while taking Redoxon, stop taking the product and speak to a pharmacist or GP.

Redoxon 1000 mg May Be Suitable For:

• Adults aged 18 and over who wish to supplement their daily vitamin C intake as part of overall wellness and immune support.
• Adults with low dietary intake of vitamin C, such as those with a limited intake of fruit and vegetables.
• Adults who smoke — smoking increases the body's use of vitamin C and smokers may have lower vitamin C levels than non-smokers.
• Adults recovering from illness or surgery who wish to support their vitamin intake during recovery.
• Adults looking for a convenient daily antioxidant supplement in an easy-to-take effervescent format.

Speak to a Pharmacist or GP Before Taking If You:

• Have a history of kidney stones, particularly calcium oxalate stones.
• Have haemochromatosis or any iron overload condition.
• Have glucose-6-phosphate dehydrogenase (G6PD) deficiency.
• Have chronic kidney disease.
• Are pregnant or breastfeeding and considering doses above the reference nutrient intake. A pharmacist or GP can advise on suitable doses during pregnancy.
• Are taking warfarin or other anticoagulants, as high dose vitamin C may affect anticoagulant response in some patients.

Vitamin C at high doses can interact with certain medicines:

• Warfarin: high dose vitamin C may reduce the anticoagulant effect of warfarin in some patients. If you take warfarin, speak to your GP or anticoagulation clinic before starting high dose vitamin C.
• Aluminium containing antacids: vitamin C increases the absorption of aluminium. Separate doses by at least two hours.
• Aspirin and non-steroidal anti-inflammatory drugs: regular high-dose aspirin can reduce vitamin C blood levels.
• Oral contraceptives and hormone replacement therapy: may reduce vitamin C blood levels.

If you take any prescription medicine, speak to your pharmacist before starting Redoxon 1000 mg.

Redoxon 1000 mg is a General Sale List product and does not require a prescription or pharmacist consultation. It can be purchased directly through Pharmacy Planet without a clinical consultation.

Pharmacy Planet is a GPhC-registered online pharmacy. All products sold through our service are genuine, properly stored, and dispensed by qualified pharmacy professionals. We stock both prescription medicines and a range of quality vitamin supplements including Redoxon.

If you have any questions about Redoxon 1000 mg, whether it is suitable for you, or how it interacts with any medicines you take, our pharmacy team is available to help. We are happy to provide guidance on the right vitamin supplement for your needs.

Store below 25°C in a dry place. Keep the tube tightly closed after opening, as effervescent tablets absorb moisture quickly. Store in the original tube with the desiccant cap. Keep out of the sight and reach of children. Do not use after the expiry date printed on the packaging. Do not transfer to another container. Full storage instructions are provided on the product packaging.

Pharmacy Planet is a GPhC-registered online pharmacy committed to providing genuine, quality products at a fair price, with clear, accurate information to support your health decisions. Whether you are looking for prescription medicines or everyday vitamin supplements like Redoxon, our pharmacists are on hand to answer questions and help you find the right product. We follow all applicable regulations including MHRA guidance, GPhC standards, and ASA advertising rules. Every health claim on this page reflects only authorised nutrition and health claims for vitamin C.

References

1. Bayer. Redoxon 1000 mg product information. https://www.bayer.com/en/gb. Accessed May 2026.
2. NHS. Vitamins and minerals — Vitamin C. https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-c. Accessed May 2026.
3. European Food Safety Authority (EFSA). Scientific Opinion on the substantiation of health claims related to vitamin C. EFSA Journal. 2009;7(9):1226. https://efsa.onlinelibrary.wiley.com. Accessed May 2026.
4. NHS. Reference Nutrient Intakes (RNIs). https://www.nhs.uk/conditions/vitamins-and-minerals. Accessed May 2026.
5. Medicines and Healthcare products Regulatory Agency (MHRA). Yellow Card — report a side effect. https://yellowcard.mhra.gov.uk. Accessed May 2026.

Vitamin C Supplements

The table below compares the four vitamin C supplements available in the Vitamins range. All provide ascorbic acid for immune support and antioxidant protection, but differ in dose, format, and whether water is required.

Important: This comparison is for general information only and does not replace medical advice. A prescriber will decide which treatment is suitable for you following an online consultation.