BioTechUSA Vitamin C 1000 Bioflavonoids (100 Tabs)

How Vitamin C 1000 Bioflavonoids by BiotechUSA supports your objectives

🛡️ Normal immune system function — including during and after intense exercise Vitamin C contributes to the normal function of the immune system. At 1000mg per tablet, it provides meaningful support for the immune cells (neutrophils, lymphocytes, natural killer cells) that are particularly depleted by intense physical training. The formula also carries the EU-authorised claim that vitamin C helps maintain the normal function of the immune system during and after intense physical exercise, specifically at an intake of 200mg or more above the daily recommended amount — a threshold this product far exceeds.

🧬 Normal collagen formation for skin, bones, cartilage, gums and blood vessels Vitamin C is an essential cofactor for prolyl hydroxylase and lysyl hydroxylase, the two enzymes responsible for stabilising the collagen triple helix. Without it, newly synthesised collagen cannot form properly. The EU-authorised health claims for vitamin C's contribution to normal collagen formation cover the normal function of bones, cartilage, gums, skin, teeth and blood vessels — the full spectrum of collagen-dependent tissues. Each 1000mg daily tablet provides comprehensive coverage of this biosynthetic requirement.

🔬 Protection of cells against oxidative stress Vitamin C is one of the most powerful water-soluble antioxidants in the human body, neutralising reactive oxygen species in plasma and intracellular fluid. Regular intake at high doses significantly increases plasma antioxidant capacity, protecting cell membranes, DNA and proteins from oxidative damage. The bioflavonoids from lemon peel powder add a complementary antioxidant action, and also support the regeneration of oxidised vitamin C back to its active ascorbate form — extending the effective antioxidant half-life of each tablet.

🌹 Rose hips and elderflower — natural vitamin C amplifiers Rose hips (Rosa canina) are among the richest natural food sources of vitamin C, with a content of approximately 400 to 600mg/100g of dry fruit — significantly higher than citrus fruits. Elderflower contributes additional natural vitamin C alongside quercetin, rutin and other bioflavonoids. Their inclusion in the formula alongside L-ascorbic acid creates a multi-source vitamin C supplement that mirrors the full botanical context of vitamin C as it occurs in nature, rather than providing synthetic ascorbic acid in isolation.

🍋 Citrus bioflavonoids from lemon peel — bioavailability and capillary support Citrus bioflavonoids (from lemon peel powder at 1%) support the stability and bioavailability of vitamin C by inhibiting the enzyme systems that degrade ascorbate, and by contributing their own antioxidant and anti-inflammatory activity. Bioflavonoids also support capillary wall integrity and normal circulation, complementing vitamin C's contribution to normal collagen formation in blood vessel tissue.

💊 Additional contributions — iron metabolism, fatigue, nervous system Beyond its most prominent roles, vitamin C also contributes to normal iron absorption from plant-based foods, to the reduction of tiredness and fatigue, to normal psychological function and to normal nervous system function — all EU-authorised health claims backed by robust evidence.

🎯 Goal guide

🏋️ Mass gain: 1 tablet/day. Immune support and collagen protection during high training volume.

🔥 Weight loss / cutting: 1 tablet/day. Immune resilience and antioxidant protection during caloric restriction and high-frequency training.

⚖️ Daily health and body recomposition: 1 tablet/day. Foundation daily micronutrient for year-round immune, skin and connective tissue support.

Serving suggestion

Take 1 tablet per day with a large glass of water. Can be taken at any time of day. For best absorption, avoid taking simultaneously with iron supplements or large dairy meals — iron and calcium can compete with vitamin C for absorption when taken in very high doses. Do not exceed the recommended daily dose of 1 tablet. Keep out of reach of children. Food supplements do not replace a balanced nutrition and healthy lifestyle.

Best times to enjoy it

🍳 With breakfast (recommended) The most practical and consistent daily habit. Taking the tablet at breakfast with food ensures regular absorption and makes it easy to remember. The mild gastric irritation that can occasionally accompany high-dose vitamin C on an empty stomach is avoided by taking with food.

☀️ Before or after training For athletes who train in the morning or midday, taking Vitamin C 1000 around the training session aligns its peak plasma antioxidant effect with the period of highest exercise-induced free radical production and immune system challenge.

🌙 Evening (alternative) Vitamin C can be taken at any time of day without interfering with sleep. An evening protocol is equally effective for daily immune and antioxidant support, and suits individuals who prefer to separate their morning supplement routine.

📅 Every day, including rest days, year-round Vitamin C is a water-soluble vitamin excreted daily — there is no meaningful body storage. Continuous daily supplementation is required to maintain adequate plasma and tissue levels. Vitamin C needs are, if anything, higher on training days, but daily use throughout the year provides consistent protection.

Daily protein target reminder

Vitamin C 1000 Bioflavonoids is a micronutrient supplement, not a protein source. For training adaptations to fully materialise, adequate daily protein intake remains essential. Current sports nutrition science recommends 1.6 to 2.2g of protein per kg of body weight per day for active individuals.

Goal-specific guidance

For athletes under high training load: High-intensity exercise generates significant quantities of reactive oxygen species and temporarily suppresses mucosal immune function (the first line of defence against respiratory infections). Daily supplementation with 1000mg of vitamin C is one of the most evidence-based strategies for reducing the incidence and duration of upper respiratory tract infections in high-volume training athletes. Use consistently throughout training blocks without interruption.

For recovery and connective tissue support: Vitamin C is a required cofactor in collagen synthesis. Athletes who subject tendons, ligaments and cartilage to repeated mechanical loading benefit from maintaining consistently high plasma vitamin C levels that ensure collagen repair is never cofactor-limited. Pair with a marine or bovine collagen supplement for comprehensive connective tissue nutritional support.

🏅 Sport Nutrition "Did you know?"

Vitamin C at supplemental doses (200mg and above) has a specific EU-authorised health claim distinct from its standard immune function claim: it helps maintain the normal function of the immune system during and after intense physical exercise. This claim is grounded in research showing that endurance exercise and high-intensity training temporarily suppress specific aspects of immune function — particularly the secretory IgA antibody response in mucosal tissues — and that adequate vitamin C intake helps limit the duration and depth of this post-exercise immune window. This is why athletes in heavy training periods are specifically recommended to maintain consistent daily vitamin C supplementation, not as a treatment for illness, but as a preventive measure during the most immunologically challenging periods of their training year.

Full ingredient list

L-ascorbic acid, bulking agents (cellulose gel, corn starch), coating material (stabilisers (polyvinyl alcohol, polyethylene glycol), colour (titanium dioxide), anti-caking agent (talc)), herb powders 2.5% (rose hips powder, maltodextrin, elderflower powder), lemon peel powder 2.5% (citrus bioflavonoids 1%), anti-caking agents (silicon dioxide, magnesium salts of fatty acids).

Key ingredient breakdown

Allergens

Allergens: No major allergens in the formula itself. Made in a plant that also manufactures milk, egg, gluten, soy, crustaceans, sulphur dioxide and nuts containing foods. Always refer to the current product label for the most up-to-date allergen information.

Product characteristics:

• 1000mg vitamin C per tablet (1250% NRV)
• Multi-source formula: L-ascorbic acid + botanical extracts
• No artificial flavourings or sweeteners
• Suitable for vegetarians

Active ingredient profile per tablet (daily serving)

*NRV: EU Nutrient Reference Value (80mg/day for vitamin C). No NRV established for botanical extracts or bioflavonoids.

Bottle duration guide

Q1 — Why take 1000mg of vitamin C when the EU NRV is only 80mg? The EU NRV for vitamin C (80mg/day) represents the intake needed to prevent deficiency in the general population — not the optimal intake for health promotion or athletic performance. Research on vitamin C's antioxidant, immune and collagen synthesis effects consistently uses doses of 200mg to 1000mg per day. At 1000mg, plasma vitamin C is saturated (approximately 60 to 70µmol/L), providing the highest achievable steady-state tissue levels. The EU food safety authority (EFSA) has set a tolerable upper intake level for vitamin C of 2000mg/day for healthy adults, making the 1000mg dose in this product well within the established safe range.

Q2 — What are bioflavonoids and why are they included? Bioflavonoids are a broad class of plant polyphenolic compounds found naturally alongside vitamin C in citrus fruits, rose hips and other vitamin C-rich plants. They include compounds such as hesperidin, naringenin, rutin and quercetin. Their primary relevance to a vitamin C supplement is threefold: they inhibit the enzyme systems that degrade ascorbate in the body (extending the functional half-life of each dose), they contribute their own direct antioxidant activity, and they support capillary wall integrity and permeability — a function historically linked to prevention of scurvy in the flavonoid-rich whole foods that were the only available vitamin C sources for most of human history.

Q3 — Is Vitamin C 1000 Bioflavonoids suitable for vegans? The active ingredients (L-ascorbic acid, rose hips, elderflower, lemon peel) are all plant-derived or synthetic and vegan-compatible. The coating contains polyethylene glycol and polyvinyl alcohol (both synthetic, non-animal). The anti-caking agent uses magnesium salts of fatty acids — the fatty acid source is not specified on the product page. Confirm with BiotechUSA regarding the origin of the magnesium stearate before declaring the product explicitly vegan-suitable on the product page.

Q4 — Can I take Vitamin C 1000 alongside other supplements? Yes. Vitamin C is safe to combine with the vast majority of sports nutrition and health supplements. A particularly beneficial combination is vitamin C with a collagen supplement (marine or bovine hydrolysate) — the vitamin C is a required cofactor for the collagen synthesis that the collagen peptides stimulate, making the two products directly synergistic. Vitamin C also enhances the absorption of non-haem iron from plant-based foods when taken around meal times, making it a valuable companion supplement for athletes following plant-based diets.

Q5 — How long does one 100-tablet bottle last? At 1 tablet per day, the 100-tablet bottle provides exactly 100 days of use — just over 3 months. BiotechUSA also offers a 250-tablet format (approximately 8 months at 1 tablet/day) and a 30-tablet format for travel or trials. For athletes who want uninterrupted year-round supplementation at the most economical cost per tablet, the 250-tablet format is the recommended long-term choice; the 100-tablet format provides a practical initial supply or short-cycle protocol.