NOW Foods C-1000 CAPS (100 Veg Capsules): High-Potency Vitamin C with Citrus Bioflavonoids & Rutin
Looking for dependable daily immune reinforcement and collagen support? NOW Foods C-1000 Caps delivers a robust 1,000 mg dose of pure ascorbic acid reinforced with 100 mg of natural citrus bioflavonoids and 25 mg of rutin powder. Unlike basic synthetic vitamin C pills that your body can quickly flush out, this bioflavonoid-enhanced formula mirrors how vitamin C occurs in whole citrus fruits, promoting better antioxidant retention, blood vessel strength, and joint tissue defense.
Quick Facts & Product Takeaways
Potency & Form: 1,000 mg Vitamin C per single vegetarian capsule (100 servings per bottle).
Synergistic Co-Factors: Enhanced with 100 mg Citrus Bioflavonoid Complex and 25 mg Rutin Powder to guard against rapid cellular oxidation.
Clean Diet Friendly: Non-GMO, vegan/vegetarian, Kosher, Halal, and packaged in a 100% post-consumer recycled (PCR) resin bottle.
Lab-Verified Purity: Rigorously screened for heavy metals (lead, arsenic, cadmium, mercury) and microbial contaminants in ISO 17025-accredited labs.
Risk-Free Guarantee: Backed by VitaNet, LLC’s unconditional 100% money-back guarantee, which covers return shipping even on opened bottles[cite: 1].
The Science Made Simple: Why Bioflavonoids and Rutin Matter
In nature, vitamin C never grows in isolation. When you bite into an orange or a lemon, you are not simply swallowing pure ascorbic acid; you are ingesting a rich family of plant-derived protective compounds known as citrus bioflavonoids and flavonols like rutin.
Plain, isolated ascorbic acid is water-soluble. When taken in large doses by itself, your digestive tract absorbs what it can, and your kidneys quickly filter out the rest into your urine. Citrus bioflavonoids (including hesperidin, naringin, and eriodictyol) and rutin act like biochemical bodyguards for vitamin C:
Synergistic Antioxidant Recycling: Bioflavonoids help keep vitamin C in its active, reduced state, extending its lifespan inside your cells and neutralizing free radicals generated by daily stress, exercise, and environmental toxins (Carr & Frei, Am J Clin Nutr, 1999).
Vascular & Capillary Integrity: Rutin (sourced from the flower buds of Sophora japonica) is widely studied for its ability to strengthen delicate capillary walls, promote healthy microcirculation, and support venous tone.
Collagen Synthesis for Skin and Joints: Vitamin C is an indispensable enzymatic co-factor for the hydroxylation of proline and lysine, amino acids necessary to weave stable collagen fibers that maintain youthful skin elasticity and cushion joint cartilage.
Every label claim is cross-verified directly against NOW Foods manufacturer specifications (NOW SKU: 0690 / VitaNet SKU: N0690 / UPC: 733739006905).
Supplement Facts
Serving Size: 1 Veg Capsule
Servings Per Container: 100
Component
Amount Per Serving
% Daily Value
Vitamin C (as Ascorbic Acid)
1 g (1,000 mg)
1,111%
Citrus Bioflavonoid Complex
100 mg
†
Rutin Powder (Sophora japonica) (Flower Bud)
25 mg
†
† Daily Value not established.
Other Ingredients: Hypromellose (cellulose capsule), Stearic Acid (vegetable source), Magnesium Stearate (vegetable source), and Silicon Dioxide.
Allergen Declaration: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut, or sesame ingredients. Produced in a Current Good Manufacturing Practice (cGMP) compliant facility that processes other ingredients containing these allergens.
Dietary Suitability: Suitable for vegans and vegetarians. Certified Kosher and Halal. Non-GMO verified formula.
Unrivaled Purity: NOW Foods Lab Testing & Contaminant Controls
When investing in your health, label trust is paramount. Online marketplaces are frequently flooded with non-verified supplement brands that skimp on active potency or fail basic heavy metal screenings. NOW Foods stands as an industry leader in third-party and in-house safety verification:
✓ ISO/IEC 17025:2017 Accredited Laboratories
NOW maintains private testing facilities holding formal A2LA accreditation (Certificates 6253.01 and 6253.02). Their team of more than 160 chemists, microbiologists, and research scientists conducts over 37,000 analytical determinations every single month across 68 distinct testing categories.
✓ Parts-Per-Billion Heavy Metal Screening (ICP-MS)
Utilizing Inductively Coupled Plasma-Mass Spectrometry (ICP-MS), every raw material batch is screened for toxic elemental contaminants including lead, mercury, cadmium, and arsenic. NOW adheres to internal contaminant thresholds that are frequently stricter than federal U.S. FDA requirements and California Proposition 65 limits.
✓ High-Performance Chromatography (HPLC & HPTLC)
Finished capsules are evaluated with High-Performance Liquid Chromatography (HPLC) to guarantee 100% active vitamin C strength through expiration. High-Performance Thin-Layer Chromatography (HPTLC) fingerprinting confirms the botanical authenticity of Sophora japonica, guarding against synthetic adulterants.
Botanicals undergo mass spectrometry (LC-MS/MS and GC-MS/MS) for multi-residue pesticide screening, alongside ion chromatography (IC-MS/MS) to test for trace glyphosate residues down to parts-per-billion levels. Cross-contamination is blocked via sensitive ELISA allergen assays.
How to Take, Daily Limits, and Important Precautions
While vitamin C is an essential, water-soluble nutrient with an exceptional safety profile, high-potency supplementation requires responsible use.
Suggested Usage
Take 1 vegetarian capsule daily, preferably alongside a meal and an 8-ounce glass of water. Consuming vitamin C with food buffers digestion and enhances the absorption of naturally co-occurring dietary minerals like plant-based iron.
Important Health Constraints & Edge Cases
Kidney Stone History (Oxalate Formation): The body converts a portion of excess ascorbic acid into oxalate. Individuals with a personal history of calcium oxalate kidney stones or renal impairment should consult their nephrologist before taking daily doses of 1,000 mg or higher.
Iron Overload Conditions (Hemochromatosis): Vitamin C significantly increases non-heme iron absorption. Individuals diagnosed with hemochromatosis or hemosiderosis should avoid high-potency vitamin C supplementation unless directed by their physician.
Stomach Sensitivity & Acid Reflux: Ascorbic acid is naturally slightly acidic. If you experience mild gastric discomfort or heartburn, consider taking it mid-meal, or explore buffered options like NOW Buffered C-1000 Complex, which binds ascorbic acid with mineral ascorbates (calcium ascorbate) for a non-acidic effect.
Tolerable Upper Intake Level: The National Academy of Medicine sets the Tolerable Upper Intake Level (UL) for adults at 2,000 mg per day. Single doses exceeding 2,000 mg may cause mild osmotic diarrhea or digestive cramping.
Comparison: NOW C-1000 Caps vs. Standard Vitamin C vs. Buffered C
Choosing the ideal vitamin C formula depends on your digestive tolerance, absorption goals, and lifestyle:
Product Feature
NOW C-1000 Caps (#0690)
Generic Ascorbic Acid Pills
NOW Buffered C-1000 Complex
Form
Fast-dissolving Veg Capsule
Hard Compressed Tablet
Sustained Mineral Tablet
Bioflavonoid Complex
✓ 100 mg Citrus Bioflavonoids
None (0 mg)
✓ Bioflavonoid Complex Included
Rutin Powder Included
✓ 25 mg Sophora japonica
None (0 mg)
✓ Rutin Included
Stomach Gentleness
Moderate (take with meals)
Low (sharp acidity)
Highest (pH-neutralized)
Best Suited For
Complete immune & capillary defense
Budget single-ingredient needs
Ultra-sensitive stomachs & reflux
Why Shop With VitaNet, LLC? Family-Owned Integrity Since 1995
When purchasing dietary supplements online, where you purchase matters just as much as what you buy. At VitaNet, LLC, we eliminate the uncertainty of third-party marketplace sellers by supplying verified, factory-fresh brand formulas directly to your doorstep.
Serving Online Shoppers Since 1995: Over 31 years of independent, family-owned industry experience providing science-backed wellness products[cite: 1].
100% Money-Back Guarantee (With Return Shipping Paid): If you are not completely satisfied, we issue a full refund and even pay the return postage, whether the bottle is opened or unopened[cite: 1].
Accredited Retailer Heritage: Proudly accredited with the Better Business Bureau (BBB) maintaining an A+ rating[cite: 1].
Direct Ohio Customer Support: Speak directly with knowledgeable team members based at our Hartville, Ohio location at 1-800-877-8702 or (330) 877-8786[cite: 1].
Careful Storage & Handling: All inventory is temperature-regulated and protected from excessive heat and humidity to ensure optimal nutrient potency upon delivery.
Clinical References & Authoritative Sources
In accordance with strict factual accuracy standards, statements regarding vitamin C, bioflavonoids, and human physiology are grounded in peer-reviewed scientific literature:
National Institutes of Health (NIH) Office of Dietary Supplements. "Vitamin C: Fact Sheet for Health Professionals." Updated 2021.
Carr, A. C., & Frei, B. "Toward a new recommended dietary allowance for vitamin C based on antioxidant and health effects in humans." The American Journal of Clinical Nutrition, 1999; 69(6): 1086-1107.
Vinson, J. A., & Bose, P. "Comparative bioavailability to humans of ascorbic acid alone or in a citrus extract." The American Journal of Clinical Nutrition, 1988; 48(3): 601-604.
Padayatty, S. J., et al. "Vitamin C as an antioxidant: evaluation of its role in disease prevention." Journal of the American College of Nutrition, 2003; 22(1): 18-35.
European Food Safety Authority (EFSA). "Scientific Opinion on the substantiation of health claims related to Vitamin C and immune system, collagen formation, and protection of DNA, proteins and lipids from oxidative damage." EFSA Journal, 2009; 7(9): 1226.
Frequently Asked Questions (FAQ)
1. Why are citrus bioflavonoids and rutin added to this Vitamin C formula?
Citrus bioflavonoids and rutin are natural plant compounds that naturally accompany vitamin C in fruit. They act as synergistic co-factors, helping to protect ascorbic acid from premature oxidation, encouraging better cellular utilization, and providing extra nutritional support for capillary and blood vessel integrity.
2. What is the difference between NOW C-1000 veg capsules and hard compressed tablets?
Vegetarian capsules dissolve rapidly in stomach acid without requiring heavy binders or compression glues. Hard tablets take longer to break down and can sometimes irritate sensitive stomachs, whereas veg capsules release their active ingredients smoothly and efficiently.
3. Can high doses of Vitamin C cause kidney stones or stomach cramps?
For most healthy adults, 1,000 mg daily is well within safe tolerances. However, excess ascorbic acid can be metabolized into oxalate. If you have a history of calcium oxalate kidney stones, or if you take more than the 2,000 mg upper daily limit, you may experience loose stools or increase stone risk. Always check with your physician if you have kidney concerns.
4. How does NOW Foods verify heavy metal safety and purity?
NOW Foods tests every batch in their in-house, ISO/IEC 17025-accredited laboratories using high-resolution Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). This instrument detects heavy metals (lead, mercury, cadmium, arsenic) down to parts-per-billion levels, ensuring the supplement adheres to strict safety boundaries.
5. Is NOW C-1000 Caps suitable for vegans and individuals with allergies?
Yes. The capsule shell is made from plant-derived hypromellose (cellulose), making it 100% vegan and vegetarian. It is formulated without wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts, or sesame.
6. What is the best time of day to take NOW C-1000 Caps?
It is best taken in the morning or early afternoon with a meal and water. Taking it with food helps minimize digestive acid sensitivity and assists in the natural absorption of dietary plant iron from your meal.
7. Why should I buy NOW C-1000 Caps from VitaNet, LLC instead of open marketplaces?
VitaNet, LLC has been an independent, family-owned discount vitamin retailer since 1995[cite: 1]. We ship authentic, climate-protected inventory and stand behind every single bottle with an unconditional 100% money-back guarantee where we even pay the return shipping[cite: 1].
