NOW Foods Buffered C-1000 Complex: High-Potency Vitamin C That Is Gentle on Your Stomach
Looking for the powerful immune and collagen benefits of 1,000 mg Vitamin C, but get an upset stomach or acid indigestion from standard supplements?
Most standard vitamin C supplements use pure ascorbic acid. While ascorbic acid is effective, its sharp acidity can trigger stomach cramps, acid reflux, heartburn, or loose stools in people with sensitive digestive systems. NOW® Buffered C-1000 Complex solves this problem by combining ascorbic acid with calcium to form Calcium Ascorbate—a non-acidic, pH-buffered form of vitamin C that breaks down smoothly in your stomach without triggering excess acid.
To mimic how vitamin C is found in fresh, whole fruits, this advanced formula also provides a potent 250 mg Citrus Bioflavonoid Complex, plus concentrated Acerola Fruit Powder and Rutin Powder. These botanical partners protect the vitamin C molecule from oxidation and help your cells absorb and use it more effectively.
The Science of Buffered Vitamin C: Why Calcium Ascorbate Protects Your Stomach
Your stomach is naturally acidic, with a resting gastric fluid pH ranging from 1.5 to 3.5. When you ingest a high-potency 1,000 mg tablet of standard ascorbic acid (which carries an acidic pH around 2.5), that sudden burst of acidity can irritate the sensitive lining of the esophagus and stomach wall.
How the buffering process works: In Calcium Ascorbate, ascorbic acid is chemically bound to calcium ions. This neutralizes the sharp acid, raising the solution to an almost neutral pH of roughly 6.8 to 7.4. When it reaches your gastrointestinal tract, the vitamin C is released gradually without causing a sudden spike in stomach acid.
✔Eliminates Heartburn & Gastric Distress: Clinical trials comparing buffered calcium ascorbate to ascorbic acid demonstrate significantly lower rates of epigastric discomfort, acid reflux, and nausea (Gruenwald J, et al., Adv Ther, 2006; 23(1):171-178).
✔Bonus Bioavailable Calcium: Every tablet naturally supplies 100 mg of elemental calcium (8% of the Daily Value), supporting strong bone mineral density and normal muscle function while it buffers the vitamin C.
✔Gentle on an Empty Stomach: While high-dose ascorbic acid almost always requires a heavy meal to prevent nausea, calcium ascorbate is remarkably well tolerated, even by individuals managing acid sensitivity.
The Whole-Fruit Advantage: Bioflavonoids, Acerola, and Rutin Synergy
In nature, vitamin C does not exist as an isolated molecule. In oranges, lemons, and berries, it is surrounded by bioflavonoids—plant-based polyphenols that protect the plant against harsh sunlight and pests. NOW Buffered C-1000 Complex includes 350 mg of targeted botanical bio-enhancers to recreate this natural partnership:
1. Citrus Bioflavonoid Complex (250 mg)
Extracted from whole citrus fruits, these active flavonoids (including hesperidin and naringin) work synergistically with vitamin C. Human studies indicate that bioflavonoids significantly enhance ascorbic acid absorption and help slow down its elimination from the bloodstream, leading to higher, longer-lasting tissue saturation (Vinson JA, Bose P, Am J Clin Nutr, 1988; 48(3):601-604).
2. Acerola Powder (50 mg) (Malpighia punicifolia)
Acerola cherries are one of the planet's densest botanical sources of native vitamin C. Adding pure acerola fruit powder provides trace phytonutrients, carotenoids, and fruit enzymes that synthetic vitamin supplements lack.
Rutin is a powerful citrus flavonoid famous for reinforcing microscopic blood vessels and micro-capillaries. It helps protect red blood cells and maintains healthy vascular elasticity throughout the circulatory system.
Comprehensive Health Benefits: What 1,000 mg of Buffered C Does for You
Vitamin C (L-ascorbate) is an essential water-soluble nutrient that your body cannot synthesize or store in large quantities. A daily intake delivers broad, evidence-based health benefits:
Robust White Blood Cell & Immune Defense: Vitamin C concentrates heavily inside immune cells such as neutrophils and lymphocytes. It stimulates their movement toward foreign invaders, enhances phagocytosis (the clearing of cellular debris), and protects delicate immune cells from self-inflicted oxidative damage during immune challenges (Carr AC, Maggini S, Nutrients, 2017; 9(11):1211).
Collagen Synthesis for Skin, Joints, and Cartilage: Vitamin C is the irreplaceable cofactor for two critical enzymes: prolyl hydroxylase and lysyl hydroxylase. Without adequate vitamin C, your body cannot cross-link amino acids into stable collagen fibers. Regular intake supports skin firming, wound recovery, arterial flexibility, and healthy joint cartilage (Pullar JM, et al., Nutrients, 2017; 9(8):866).
Potent Systemic Antioxidant Protection: Every day, pollution, intense exercise, and metabolic processes create unstable free radicals. Vitamin C donates electrons to neutralize these free radicals, preventing lipid peroxidation and regenerating other oxidized antioxidants like Vitamin E back into their active states.
Enhanced Non-Heme Iron Absorption: For vegetarians and individuals who eat plant-based foods, iron from beans, greens, and grains can be difficult to absorb. Vitamin C converts non-heme ferric iron (Fe3+) into soluble ferrous iron (Fe2+), significantly boosting total iron uptake in the duodenum to support healthy energy and stamina (Hallberg L, et al., Am J Clin Nutr, 1989; 49(1):140-144).
Other Ingredients: Hydroxypropyl Cellulose, Hypromellose (cellulose), Stearic Acid (vegetable source), Vegetarian Coating, Magnesium Stearate (vegetable source), and Silicon Dioxide.
Allergen & Dietary Specifications: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut, or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Product Details: Vegetarian / Vegan Formula • Non-GMO • Kosher Certified • Made and quality-tested in the USA with globally sourced ingredients.
Industry-Leading Purity: NOW Foods Lab Testing & Strict Contaminant Standards
In today’s supplement marketplace, unregulated third-party brands frequently sell products that fail to meet label claims or carry hazardous contaminants. NOW Foods stands out as an industry gold standard, executing over 31,000 laboratory tests and analytical evaluations every single month in their world-class facilities in Bloomingdale, Illinois.
How NOW Verifies Every Batch of Buffered C-1000 Complex:
ISO/IEC 17025:2017 Accredited In-House Labs: NOW operates analytical and microbiological testing laboratories officially accredited by the American Association for Laboratory Accreditation (A2LA Certificates 6253.01 Chemical & 6253.02 Biological). This represents the highest benchmark of analytical competence globally.
Ultra-Sensitive Heavy Metal Testing (ICP-MS): Utilizing Inductively Coupled Plasma Mass Spectrometry (ICP-MS), NOW tests down to parts-per-billion (ppb) detection limits. Every raw batch is strictly screened to ensure lead, arsenic, cadmium, and mercury levels remain far below allowable international and state safety thresholds.
Screening for 400+ Pesticides & Chemical Solvents: Advanced Gas Chromatography-Mass Spectrometry (GC-MS) and Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) systems screen botanical components (Acerola and Rutin) for agricultural chemical residues, organic solvents, and adulterants.
Strict Microbiological & Pathogen Screening: Utilizing bioMérieux automated PCR testing alongside selective media plating, all materials undergo multi-phase screening to verify zero contamination from Salmonella, Escherichia coli, Staphylococcus aureus, coliforms, yeast, and molds.
Fourier-Transform Infrared (FTIR) Identity Testing: Incoming raw ingredients undergo spectroscopic fingerprinting to verify exact botanical and chemical authenticity before any material enters a tablet press.
Industry Leadership: NOW is an NPA (Natural Products Association) A-rated GMP-certified manufacturer and was awarded the prestigious NutraIngredients-USA Industry Initiative of the Year Award for their self-policing work uncovering sub-potency and adulteration among unverified online supplement brands.
Important Safety Guidelines, Precautions, and Contraindications
While Calcium Ascorbate is exceptionally safe and gentle for the vast majority of healthy adults, high-dose nutritional supplements must always be used responsibly. Review these guidelines before beginning supplementation:
Who Should Consult a Physician Prior to Use:
Individuals with a History of Kidney Stones: The body naturally breaks down a fraction of excess vitamin C into oxalates. People with hyperoxaluria or recurring calcium-oxalate kidney stones should limit daily vitamin C from supplements to 500 mg or less, or speak with a nephrologist (NIH Office of Dietary Supplements, Vitamin C Fact Sheet).
People with Iron Overload Conditions: Because vitamin C significantly enhances non-heme iron absorption, individuals with hemochromatosis, thalassemia, or sideroblastic anemia must monitor their vitamin C intake carefully to prevent excess iron accumulation.
G6PD Deficiency: High doses of vitamin C can occasionally induce hemolytic anemia in individuals with glucose-6-phosphate dehydrogenase deficiency.
Prescription Drug Interactions: Vitamin C may interact with blood-thinning agents (warfarin), certain cholesterol-lowering statin regimens, and chemotherapy protocols. Always keep your healthcare team informed of all dietary supplements you take.
Adult Use Only: Keep out of reach of children. If you are pregnant, nursing, or have a chronic medical condition, consult your physician before using this formula.
How to Take NOW Buffered C-1000 Complex for Maximum Absorption
To get the most value from each tablet, follow these evidence-based usage practices:
Suggested Serving: Take 1 tablet daily, preferably with a meal, or as directed by your healthcare practitioner.
Drink Plenty of Water: As a water-soluble vitamin, vitamin C works best and filters smoothly through your urinary system when accompanied by a full 8-ounce glass of pure water.
Splitting Higher Dosages: If your functional doctor recommends higher therapeutic doses (such as 2,000 mg daily), take 1 tablet in the morning and 1 tablet in the late afternoon. Spreading doses across the day ensures consistent, sustained blood plasma levels rather than rapid urinary excretion.
Storage Guidance: Store in a cool, dry, dark pantry after opening. Keep the lid tightly sealed to protect tablets from ambient moisture and humidity. Natural color variations from batch to batch are completely normal for botanical products.
Why Buy NOW Foods Supplements from VitaNet®, LLC?
When it comes to nutritional supplements that affect your health and wellbeing, where you purchase matters just as much as what brand you select.
✔Family-Owned Heritage Since 1995: VitaNet®, LLC is an independent, family-owned health retailer based in Hartville, Ohio[cite: 1]. With over 30 years of hands-on nutritional retail experience, we sell only authentic, fresh, climate-controlled brand-name products[cite: 1].
✔100% Money-Back Guarantee (We Pay Return Shipping): We stand behind every product we sell. If you are unsatisfied for any reason within 12 months of purchase, return the product—even if opened—and we will refund 100% of your purchase price and cover return shipping costs[cite: 1].
✔BBB A+ Accredited Business: We maintain an A+ rating with the Better Business Bureau, reflecting our dedication to ethical customer service, real human phone support, and honest everyday discount pricing[cite: 1].
✔Real Telephone Support: Have questions about your order or shipping? Speak with our knowledgeable team in Hartville, Ohio by dialing toll-free 1-800-877-8702 or local 330-877-8786[cite: 1].
Frequently Asked Questions (FAQ)
What does "buffered" vitamin C mean, and how does it help sensitive stomachs?
Standard vitamin C is pure ascorbic acid, which is naturally sour and acidic (pH ~2.5). In "buffered" vitamin C, the ascorbic acid is bound to a dietary mineral like calcium, creating calcium ascorbate. This changes the pH to a near-neutral level (~7.0), preventing stomach upset, heartburn, and digestive cramping while delivering the exact same active vitamin C benefits.
How is NOW Buffered C-1000 Complex different from standard vitamin C tablets?
Unlike generic vitamin C tablets that only contain isolated ascorbic acid, NOW Buffered C-1000 Complex combines 1,000 mg of non-acidic calcium ascorbate with 100 mg of calcium, 250 mg of citrus bioflavonoids, 50 mg of acerola fruit powder, and 50 mg of rutin powder. This mirrors the nutritional balance of whole citrus fruits and enhances antioxidant delivery.
Does 1,000 mg of Vitamin C exceed the daily recommended allowance?
The basic Daily Value (DV) set by the FDA is 90 mg for adult men and 75 mg for adult women, which is the baseline amount needed to prevent deficiency diseases like scurvy. However, optimal wellness, cellular antioxidant protection, and immune support often benefit from higher daily intakes. The safe upper intake level (UL) established by the National Academy of Medicine is 2,000 mg daily for adults, so 1,000 mg is well within recognized safe dietary limits.
Why are citrus bioflavonoids, acerola, and rutin added to this formula?
Bioflavonoids, acerola, and rutin are plant-derived antioxidants that work symbiotically with vitamin C. Scientific research shows that bioflavonoids improve the body’s ability to absorb and retain vitamin C in tissues, while rutin helps strengthen delicate capillaries and blood vessel walls.
Can I take this supplement if I follow a vegetarian or vegan lifestyle?
Yes. NOW Foods Buffered C-1000 Complex is 100% vegetarian and vegan-friendly. It utilizes a plant-based cellulose coating and contains no animal-derived ingredients or gelatin.
What if I try this product and it does not agree with me?
When you order from VitaNet®, LLC, you are protected by our risk-free 100% money-back guarantee[cite: 1]. You have up to 12 months to return the product—even if the bottle is opened and partially used—and we will refund your full purchase price and pay for return shipping[cite: 1].
