Ordinary vitamin C supplements flood your body with a massive dose all at once, leading to digestive upset and quick elimination through urine. Solaray C-1000 Two-Stage Timed-Release is engineered differently: half of the vitamin C releases immediately to replenish your natural defenses, while the remaining half releases slowly over up to 12 hours for all-day immune, antioxidant, and collagen support.
✓ Dual-Action Release: 50% immediate, 50% sustained over up to 12 hours
✓ Whole-Food Base: Enriched with sun-grown Rose Hips & Acerola Cherry
✓ Stomach-Friendly: Avoids the sudden acid spike of regular ascorbic acid
✓ Clean & Tested: 100% Vegan VegCaps, verified for purity and potency
Medical & Nutritional Accuracy Note: This health guide has been cross-referenced with peer-reviewed clinical data on human ascorbic acid pharmacokinetics and gastrointestinal absorption pathways.
How Two-Stage Timed-Release Works: Solving the "Vitamin C Waste" Problem
Vitamin C (ascorbic acid) is water-soluble, meaning your body cannot produce it or store it in fat tissue for later use. Most people do not realize that your intestinal tract has strict "entry doors" (called SVCT1 transporters) that move vitamin C into your bloodstream.
What Happens with Regular 1,000 mg Vitamin C?
When you swallow a standard 1,000 mg pill, the digestive doors get overwhelmed instantly. Studies show that when taken in a single, non-timed dose of 1,000 mg, less than 50% is actually absorbed. The leftover unabsorbed acid pulls water into your bowels (frequently causing cramps or loose stools), while your kidneys quickly dump the rest into your urine within 2 to 3 hours.
The Solaray Two-Stage Advantage:
Stage 1 (Immediate Release — 500 mg): Dissolves promptly in the stomach, elevating blood vitamin C levels right away to jumpstart cellular defense and neutralize existing free radicals.
Stage 2 (Sustained Release — 500 mg): Gradually trickles vitamin C into your system over a 12-hour period. This keeps your bloodstream and white blood cells steadily supplied throughout the day without overwhelming your kidney clearance threshold.
Everyday Health Benefits: Why Your Body Relies on All-Day Vitamin C
1. Continuous Immune Defense
Your immune system's primary defenders—white blood cells (neutrophils and lymphocytes)—require high concentrations of vitamin C to attack pathogens and clear toxins. Sustained release guarantees your immune cells have access to this fuel around the clock.
2. Firm Skin, Healthy Hair & Joint Collagen
Vitamin C is an indispensable co-factor in collagen synthesis. Without adequate circulating vitamin C, your body cannot cross-link the amino acids proline and lysine into collagen fibers, which support skin elasticity, cartilage cushions, and blood vessel walls.
3. Enhanced Antioxidant Base (Rose Hips & Acerola)
Solaray reinforces pure ascorbic acid with sun-ripened Rose Hips and Acerola Cherries. These botanical sources naturally provide plant bioflavonoids that help protect vitamin C from premature oxidation, mimicking how nutrients appear in nature.
4. Superior Iron Absorption
Taking vitamin C alongside meals helps convert non-heme plant iron into a bioavailable, soluble form that your intestines absorb more easily, helping to prevent low energy associated with poor dietary iron uptake.
Scientific Authority & Clinical Citations
Our health claims conform strictly to established biochemical research:
Levine, M., et al. (National Institutes of Health)."Vitamin C pharmacokinetics in healthy volunteers: Evidence for a recommended dietary allowance." PNAS, 1996. Demonstrated that absorption efficiency drops dramatically above single doses of 200 mg to 500 mg, validating the superiority of divided and sustained delivery. [PMID: 8622996]
Carr, A. C., & Maggini, S."Vitamin C and Immune Function." Nutrients, 2017. Confirmed that active leukocytes accumulate vitamin C up to 100 times higher than plasma concentrations, essential for microbial killing and oxidative protection. [PMID: 29099763]
Pullar, J. M., Carr, A. C., & Vissers, M. C. M."The Roles of Vitamin C in Skin Health." Nutrients, 2017. Established the necessity of daily circulating ascorbate to stimulate collagen gene expression and hydroxylation. [PMID: 28805671]
Linus Pauling Institute (Oregon State University)."Vitamin C & Bioavailability." Micronutrient Information Center. Highlighted the role of natural bioflavonoid fruit complexes in digestive comfort and cellular antioxidant support.
Complete Ingredient Listing & Supplement Facts
Solaray maintains full label transparency. No artificial colors, preservatives, or animal byproducts are used in this formulation.
Formulated without: Gluten, Soy, Milk, Eggs, Fish, Shellfish, Tree Nuts, Peanuts, or Artificial Preservatives. 100% Vegan & Non-GMO.
Directions, Suggested Use & Safety Precautions
Recommended Daily Intake: Adults take one (1) VegCap daily with a meal or a large glass of water, or as directed by a healthcare professional. Because this formula delivers steady levels of vitamin C throughout the day, taking it with your morning breakfast or lunch helps ensure optimal daytime vitality and immune readiness.
Safety Information & Health Precautions:
Keep out of reach of children. Store in a cool, dry place away from direct sunlight.
Do not use if the tamper-evident safety seal is broken or missing.
Kidney Stones: Individuals with a personal history of calcium oxalate kidney stones should consult their doctor before taking daily supplemental vitamin C exceeding 1,000 mg.
Iron Conditions: Because vitamin C increases dietary iron uptake, individuals diagnosed with hemochromatosis should speak to their physician before supplementing.
If you are pregnant, nursing, or taking prescription medications (such as blood thinners or chemotherapy agents), consult your physician prior to use.
Frequently Asked Questions (FAQ)
What makes Solaray Two-Stage Timed-Release Vitamin C better than regular ascorbic acid?
Standard vitamin C pills release their entire dose all at once. Because your body can only process a small amount at a time, most of that dose spills into your urine within hours. Solaray's formula releases 50% immediately for quick cellular uptake, and 50% gradually over 12 hours. This provides sustained antioxidant protection all day while remaining gentle on sensitive stomachs.
Why are Rose Hips and Acerola Cherry included in this formula?
Rose hips and acerola cherries are natural whole-food sources of vitamin C packed with naturally occurring bioflavonoids. These natural compounds protect vitamin C against breakdown, enhance its antioxidant capability, and mirror how vitamin C is found in natural fruits.
Will this 1,000 mg vitamin C capsule cause stomach cramps or diarrhea?
Digestive upset usually occurs when an unabsorbed megadose of acidic ascorbic acid sits in the large intestine. Because Solaray's two-stage system spreads the 1,000 mg dose out over a 12-hour window, your gut absorbs it progressively, drastically reducing the risk of acidity, cramps, or osmotic diarrhea.
When is the best time of day to take Solaray C-1000 Timed-Release?
We recommend taking 1 VegCap in the morning with your breakfast. Taking it early allows the sustained-release matrix to support your energy metabolism, collagen rebuilding, and immune defenses throughout your active daytime hours.
Are these capsules vegan, gluten-free, and allergen-free?
Yes. Solaray uses 100% vegetarian capsules (VegCaps) made from plant cellulose. This product contains no gelatin, gluten, soy, dairy, nuts, artificial flavors, or synthetic preservatives.
As a dietary supplement, take 1 capsule daily with a meal or a glass of water.
