Vitamin C 1000 mg, Tablets, Supports Immune Health & Antioxidant Protection*
Lifesource Vitamins Vitamin C 1000 mg provides high-potency ascorbic acid to support normal immune function, antioxidant protection, collagen formation, and iron absorption. Produced in FDA-registered, GMP-certified facilities and 3rd-party tested for identity, potency & purity.*
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
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. In addition, we reference reviews from leading health organizations and insights from top global universities to ensure our guidance aligns with credible science.*
Clinically Studied Benefits
✓ Supports immune support — Vitamin C supports epithelial barrier integrity and leukocyte functions; regular use helps shorten common-cold duration.
NIH/PubMed — Carr, 2017
✓ Common-cold duration (adjunct) — Meta-analyses of human RCTs show reduced duration/severity with regular vitamin C supplementation.
NIH/PubMed — Hemilä, 2013
✓ Antioxidant protection — Ascorbate scavenges reactive oxygen species and helps regenerate other antioxidants; human data show lower oxidative stress markers.
NIH/PubMed — Carr, 2017
✓ Collagen formation — Essential cofactor for collagen hydroxylation; supports skin, connective tissue & wound repair.
NIH/PubMed — Carr, 2017
✓ Iron absorption — Enhances non-heme iron uptake for improved energy metabolism.
NIH/PubMed — Lane, 2014
✓ Endothelial & cardiometabolic health — Evidence links vitamin C with improved vascular function & lipid markers.
NIH/PubMed — Carr, 2017
✓ Blood pressure (adjunct) — RCTs & meta-analyses show modest BP reduction, especially in hypertensive adults.
NIH/PubMed — Juraschek, 2012
✓ Wound healing support — Clinical data associate vitamin C sufficiency with better tissue repair.
NIH/PubMed — Carr, 2017
Additional / Promising Evidence
✓ Skin/photodamage (adjunct) — Oral vitamin C–containing regimens show signals for improved skin texture & reduced UV damage.
NIH/PubMed — Pullar, 2013
✓ Respiratory/oxidative-stress contexts — Review-level human evidence suggests supportive roles under oxidative burden (setting/dose dependent).
NIH/PubMed — Carr, 2017
University-Led & Academic Studies
✓ Immune support — Vitamin C supports epithelial barrier integrity and leukocyte functions; regular use helps shorten common-cold duration.
NIH/PubMed — Carr, 2017
✓ Collagen formation & skin — Vitamin C is essential for collagen hydroxylation; human data link adequate intake with improved dermal matrix and wound outcomes.
NIH/PubMed — Carr, 2017
Global Evidence & Reviews
✓ NIH ODS Fact Sheet — Comprehensive overview of vitamin C functions, intake & safety.
NIH/ODS — Vitamin C
✓ Harvard T.H. Chan School — Evidence summary on vitamin C and health outcomes.
Harvard — Vitamin C
✓ Johns Hopkins Medicine — Educational overview of vitamin C & antioxidant functions.
Johns Hopkins — Vitamin C
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
Brief Benefit Bullets
- Daily immune support; helps shorten common-cold duration with regular use*
- Potent antioxidant protection*
- Collagen cofactor for skin, vessels, bones & joints*
- Enhances non-heme iron absorption*
- Adjunct support for healthy endothelial function & blood pressure*
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3rd-party lab tested for purity & potency
Suggested Use
Take 1 tablet daily with a meal, or as directed by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
Product Specifications
• Serving Size — 1 Tablet
• Servings Per Container — 100
• Active — Vitamin C (Ascorbic Acid) 1000 mg per serving
• Form — Tablets
• Free From — Non-GMO, gluten-free, no artificial colors*
• Quality — Third-party tested for identity, potency & purity
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.
Vitamin C 1000 mg tablets — supports immune health, antioxidant defense, collagen & iron absorption. Clinically Studied Ingredients — NIH/PubMed!*
