NOW Foods C-500 with Rose Hips: Quick Overview & Key Takeaways
If you are looking for a reliable, stomach-friendly daily antioxidant, NOW C-500 Rose Hip (250 tabs) offers a balanced 500 mg dose of pure ascorbic acid paired with natural rose hips powder. Unlike massive megadoses that rush through your system unabsorbed, a 500 mg tablet hits the body's natural absorption "sweet spot" while delivering botanical bioflavonoids for steady cellular defense.
Target Potency
500 mg of Vitamin C (556% Daily Value) per single tablet serving, perfectly calibrated for high cellular uptake.
Botanical Co-Factors
Enriched with 40 mg of genuine Rose Hips (Rosa canina) to provide complementary plant polyphenols and bioflavonoids.
Clean Formula
Non-GMO, vegan, soy-free, and manufactured without gluten, dairy, nuts, or artificial preservatives.
250-Day Value
An economical 250-tablet bottle provides over 8 months of daily nutritional support at direct discount savings.
The Science of Vitamin C & Rose Hips: Why This Pairing Works
Vitamin C (ascorbic acid) is an essential water-soluble nutrient. Because humans lack the enzyme L-gulonolactone oxidase, our bodies cannot synthesize vitamin C internally; we must obtain it through diet or supplementation every single day (National Institutes of Health Office of Dietary Supplements).
In clinical biochemistry, taking vitamin C provides multiple vital physiological functions:
Immune Defense & Phagocyte Support: Vitamin C accumulates inside white blood cells (neutrophils and macrophages) at levels 50 to 100 times higher than in bloodstream plasma. During an immune response, these cells deploy vitamin C to defend against microbial invaders while shielding healthy tissues from free-radical damage (Carr & Maggini, Nutrients, 2017).
Collagen Synthesis for Skin, Joint & Blood Vessel Health: Vitamin C acts as an obligate enzymatic cofactor for the enzymes prolyl hydroxylase and lysyl hydroxylase. These enzymes cross-link collagen fibers to give structure, strength, and elasticity to your skin, cartilage, tendons, bones, and capillary walls (Pullar et al., Nutrients, 2017).
Enhanced Dietary Iron Absorption: Taking vitamin C alongside non-heme plant iron converts ferric iron (Fe3+) into the much more soluble ferrous iron (Fe2+), significantly boosting mineral uptake in the small intestine (Hallberg et al., American Journal of Clinical Nutrition, 1989).
Why Add Rose Hips (*Rosa canina*)?
Rose hips are the nutrient-packed seed bulbs left behind after wild rose petals drop in the autumn. In nature, vitamin C does not exist as an isolated chemical; it is surrounded by plant bioflavonoids, carotenoids, and polyphenols. Adding 40 mg of genuine rose hips powder mimics this whole-food matrix. Bioflavonoids act as protective cofactors that stabilize ascorbic acid, slowing its oxidation so your cells can utilize it more efficiently (Roman et al., Plants, 2020).
The 500 mg Sweet Spot vs. Megadosing
Your body absorbs vitamin C across the intestinal lining using specialized microscopic transport gates called SVCT1 transporters (Sodium-Dependent Vitamin C Transporters). Clinical pharmacokinetic studies demonstrate that SVCT1 gates absorb vitamin C at peak efficiency between 200 mg and 500 mg per single intake (Levine et al., PNAS, 1996). When an individual consumes massive 1,000 mg to 2,000 mg tablets all at once, these intestinal gates become saturated; the unabsorbed excess is flushed out in the urine or can pull water into the colon, causing loose stools. By supplying 500 mg, NOW C-500 delivers maximum cellular saturation without waste or digestive discomfort.
Complete Supplement Facts & Ingredient Breakdown
Transparency is paramount when evaluating nutritional supplements. Every ingredient in this formula serves a distinct functional purpose, with zero artificial coloring, chemical preservatives, or hidden sweeteners:
Supplement Facts
Serving Size: 1 Tablet
Servings Per Container: 250
Active Ingredient
Amount Per Serving
% Daily Value
Vitamin C (as Ascorbic Acid)
500 mg
556%
Rose Hips Powder (Rosa canina) (Fruit)
40 mg
† Daily Value not established
Other Ingredients (Excipients Explained)
Microcrystalline Cellulose: Plant-derived dietary fiber used to hold the tablet together and provide consistent shape.
Stearic Acid (Vegetable Source): A naturally occurring plant-based fatty acid used as a natural lubricant so powder flows evenly during pressing.
Magnesium Stearate (Vegetable Source): A plant mineral salt that prevents tablets from sticking to manufacturing machinery.
Silicon Dioxide: Natural silica mineral used to absorb moisture and keep tablets dry and stable.
Vegetarian Coating: A water-soluble plant cellulose film that makes the tablet smooth, easy to swallow, and easy on the esophagus.
Allergen & Dietary Status
✓ Allergen Free: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
NOW Foods World-Class Lab Testing & Strict Contaminant Constraints
Because dietary supplements are ingested daily to support health, quality verification is not an afterthought—it is a critical safety shield. While many vitamin brands act purely as "virtual marketers" outsourcing their manufacturing to unknown third parties, NOW Foods owns and operates state-of-the-art analytical testing laboratories staffed by over 150 chemists, microbiologists, and research scientists.
NOW conducts over 31,000 quality tests every single month across raw botanical ingredients, in-process production, and finished bottles to guarantee potency and screening against harmful environmental toxins:
Heavy Metal Screening (ICP-MS)
Using Inductively Coupled Plasma-Mass Spectrometry, NOW conducts over 11,000 elemental tests monthly. This instrument detects toxic trace metals—Lead (Pb), Arsenic (As), Cadmium (Cd), and Mercury (Hg)—at parts-per-billion (ppb) sensitivity, strictly enforcing California Proposition 65 and USP standards.
Purity & Active Potency (HPLC)
High-Performance Liquid Chromatography verifies that every tablet contains the declared 500 mg of active ascorbic acid throughout the entire product shelf life, guarding against degradation from ambient heat and humidity.
Botanical Identity (HPTLC)
High-Performance Thin-Layer Chromatography creates a chemical "fingerprint" of the rose hips powder, verifying authentic Rosa canina fruit tissue and ensuring raw botanicals have not been adulterated with spent materials or counterfeit herbs.
Pesticide & Glyphosate Defense
Tandem Mass Spectrometry (LC-MS/MS and GC-MS/MS) screens for hundreds of agricultural pesticides. Dedicated IC-MS/MS systems specifically test for glyphosate residue down to parts-per-billion levels.
Microbiological & Pathogen Screening
Every batch undergoes strict microbial testing to confirm total absence of harmful pathogens, including Salmonella, Escherichia coli, and Staphylococcus aureus, while meeting tight limits for yeast, mold, and aerobic plate counts under NPA A-rated and Eurofins Good Manufacturing Practice (GMP) standards.
Product labels provide standard instructions, but practical application often requires understanding how your digestive system handles nutrients:
The Label Says: "Take 1 tablet 1 to 3 times daily, preferably with food."
In Real Practice:
✓ Always Take With Meals: Pure ascorbic acid is mildly acidic (pH around 2.5 to 3.0 in solution). Taking it on an empty stomach can trigger mild stomach discomfort or acid reflux in sensitive individuals. Taking your tablet alongside breakfast or lunch buffers this natural acidity.
✓ Divide Your Intake Throughout the Day: Because vitamin C is water-soluble with a short half-life in the bloodstream (about 30 minutes to 2 hours), taking one 500 mg tablet in the morning and a second tablet with dinner maintains steady blood levels 24 hours a day far better than taking multiple tablets at once.
Who Needs to Exercise Caution?
Individuals with Calcium Oxalate Kidney Stones: Excess ascorbic acid can partially metabolize into urinary oxalate. If you have a personal history of hyperoxaluria or calcium oxalate kidney stones, keep daily supplemental vitamin C under 1,000 mg and discuss your routine with your nephrologist or physician.
Hemochromatosis (Iron Overload Disorder): Because vitamin C substantially increases intestinal non-heme iron absorption, individuals with genetic hemochromatosis or iron overload syndromes should avoid taking supplemental vitamin C with iron-rich meals.
Prescription Medications: High-dose vitamin C can interact with certain anticoagulant medications (like warfarin) or lipid-lowering therapies. Always review supplements with your healthcare provider.
Why Buy NOW Supplements from VitaNet®, LLC?
When buying health supplements online, where you purchase is just as important as what you buy. Open online marketplaces frequently suffer from unverified third-party resellers, heat-damaged inventory stored in improper warehouses, and expired expiration dates.
VitaNet®, LLC is an independent, family-owned supplement and natural health retailer based in Hartville, Ohio, serving customers nationwide since 1995[cite: 1]:
31+ Years of Hands-On Industry Experience
Founded with deep foundations in human biochemistry, VitaNet provides genuine product curation rather than automated dropshipping[cite: 1].
Fresh, Climate-Controlled Inventory
We receive fresh production runs directly from certified manufacturers like NOW Foods, ensuring active potency and extended expiration dates.
If you are not completely satisfied, VitaNet offers an unconditional 100% money-back guarantee—even paying the return shipping cost on opened bottles[cite: 1].
BBB A+ Accredited Direct Support
Speak directly with knowledgeable American customer service specialists toll-free at 1-800-877-8702 with verified BBB A+ business integrity[cite: 1].
Frequently Asked Questions (FAQ)
What is the benefit of adding rose hips to Vitamin C?
Rose hips are the natural seed fruit of the wild rose plant (Rosa canina). They naturally contain bioflavonoids, polyphenols, and trace nutrients that help stabilize ascorbic acid. In nature, vitamin C is surrounded by these protective botanical compounds, which help prevent oxidation and support better cellular utilization.
Why choose a 500 mg dose instead of 1,000 mg or 2,000 mg?
Your intestinal cells rely on specialized transport channels (SVCT1) that absorb vitamin C efficiently at doses up to 500 mg. Single megadoses over 1,000 mg overwhelm these transport gates, meaning a large percentage is eliminated in the urine unabsorbed and can cause digestive upset or loose stools. Taking 500 mg once or twice daily optimizes bloodstream levels without waste.
How does NOW Foods test for heavy metals and contaminants?
NOW operates in-house analytical laboratories running over 31,000 quality tests each month. They utilize high-sensitivity Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to screen for lead, arsenic, cadmium, and mercury down to parts-per-billion limits, adhering strictly to California Proposition 65 and USP standards. They also screen for microbial pathogens and pesticide residues using tandem mass spectrometry.
Is NOW C-500 with Rose Hips vegan and gluten-free?
Yes. The formula is 100% vegetarian/vegan and uses a vegetable-source coating and excipients. It is manufactured without wheat, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients in an NPA A-rated Good Manufacturing Practices (GMP) facility.
What is the best time of day to take this supplement?
It is best taken with a meal, such as breakfast or lunch. Taking ascorbic acid with food cushions stomach acid, prevents mild indigestion, and enhances the absorption of dietary plant iron from your meal.
Can I take this supplement if I have a history of kidney stones?
If you have a medical history of calcium oxalate kidney stones, you should consult your doctor before taking high supplemental doses of vitamin C, as ascorbic acid partially converts into oxalate in the urinary tract. Total daily intake should generally stay within moderate thresholds advised by your physician.
