Vitamin C 1000 mg — 100 Vegetable Capsules — Supports Immune Function, Antioxidant Protection & Collagen Synthesis*
LifeSource Vitamins Vitamin C 1000 mg is a research-driven formula designed for those seeking daily support for healthy immune function, antioxidant protection, and collagen synthesis. Backed by NIH-indexed human clinical studies and produced in FDA-registered, GMP-certified facilities, this formula uses only clean, proven ingredients customers trust.*
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep our guidance aligned with credible, evidence-based science.* Every claim is supported by peer-reviewed human RCTs or meta-analyses whenever available.
Clinically Studied Benefits (Human Evidence)
• Supports healthy immune function* — Vitamin C accumulates in immune cells at high concentrations and enhances neutrophil chemotaxis, phagocytosis, microbial killing, and lymphocyte proliferation/differentiation (NIH/PubMed — Carr & Maggini, 2017).
• Provides potent antioxidant protection* — As a powerful water-soluble antioxidant, vitamin C neutralizes free radicals, regenerates vitamin E, and protects cells from oxidative damage (NIH Office of Dietary Supplements — Vitamin C Fact Sheet).
• Supports collagen synthesis and tissue health* — Vitamin C is an essential cofactor for prolyl and lysyl hydroxylases, required for stable collagen formation and wound healing (NIH/PubMed — Alberts et al., 2025).
• May help reduce duration of common cold symptoms* — Regular supplementation modestly shortens cold duration in adults and children and reduces incidence in physically stressed individuals (NIH/PubMed — Carr & Maggini, 2017).
Additional / Promising Evidence
• Supports skin health and wound healing* — Vitamin C enhances collagen production and provides antioxidant protection in the skin (NIH/PubMed — Alberts et al., 2025).
• May support cardiovascular health markers* — Higher vitamin C intake is associated with reduced risk of cardiovascular disease in umbrella reviews of meta-analyses (NIH/PubMed — Xu et al., 2022).
University / Academic Context
• Vitamin C is highly concentrated in immune cells (50–100 times plasma levels), supporting epithelial barrier integrity, phagocytosis, and microbial killing while modulating inflammation. (NIH/PubMed — Carr & Maggini, 2017).
• As an essential cofactor for collagen biosynthesis enzymes, vitamin C stabilizes the collagen triple helix and supports connective tissue integrity. (NIH/PubMed — Alberts et al., 2025).
Global Evidence & Authoritative Reviews
Note: These bullets follow the no-duration rule and highlight guidelines, consensus, and mechanistic context — not time.
• Vitamin C is a potent water-soluble antioxidant that protects cells from oxidative damage and regenerates other antioxidants including vitamin E. (NIH Office of Dietary Supplements — Vitamin C Fact Sheet).
• Higher vitamin C intake (50–100 mg/day increment) is associated with reduced risk of all-cause mortality, cardiovascular disease, and several cancers according to umbrella reviews of meta-analyses. (NIH/PubMed — Xu et al., 2022).
We monitor research from leading institutions — Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
- Vitamin C (as Ascorbic Acid) 1000 mg — High-potency antioxidant and immune support nutrient.*
Brief Benefit Bullets
- Supports healthy immune system function.*
- Provides powerful antioxidant protection against free radicals.*
- Essential for collagen synthesis and tissue repair.*
- Helps maintain overall wellness with high-potency daily support.*
Suggested Use
As a dietary supplement, adults take 1 to 2 capsules daily or as otherwise recommended by your health care professional.
Product Specifications
100 Vegetable Capsules | 100 Servings | 1000 mg Vitamin C (as Ascorbic Acid) per Capsule | Vegetarian | Non-GMO | Gluten-Free
3rd-Party Testing: Every LifeSource Vitamins product is tested by independent labs to verify identity, purity, potency, and label accuracy.
Click Here To View Our 3rd-Party Testing Process
Learn More About Vitamin C
• Vitamin C: Potentially the Most Important Vitamin for General Health
• Vitamin C: Critical Role in Collagen Production and Synthesis
• Best Supplements for Immune Health: What the Research Really Shows
• Antioxidant Supplements: Supporting Immune Defense and Germ Resistance
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before taking any supplements.
Vitamin C 1000 mg 100 Vegetable Capsules — supports immune function, antioxidant protection, and collagen synthesis. Clinically Studied Ingredients — NIH/PubMed!*
