Vitamin C — 500 mg — 180 Vegetarian Capsules — Supports Immune Health & Antioxidant Protection*
LifeSource Vitamins Vitamin C — Superior C (500 mg) combines premium ascorbic acid with threonic acid, alpha lipoic acid, and citrus bioflavonoids in an easy vegetarian capsule to support immune function, antioxidant protection, collagen synthesis, iron absorption, and overall cardiovascular wellness. 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 multiple immune mechanisms (barrier integrity, leukocyte function) and helps shorten common-cold duration in regular users.
NIH/PubMed — Carr, 2017
✓ Common-cold duration (adjunct) — Human RCT syntheses show regular vitamin C supplementation reduces cold duration and severity in various populations.
NIH/PubMed — Hemilä, 2013
✓ Antioxidant protection — Vitamin C scavenges reactive oxygen species and regenerates other antioxidants in humans, lowering oxidative stress markers.
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
✓ Iron absorption — Vitamin C enhances non-heme iron uptake in humans by reducing ferric to ferrous iron and forming absorbable complexes.
NIH/PubMed — Lane, 2014
✓ Endothelial & cardiometabolic health — Clinical evidence links vitamin C with improved vascular function & select cardiometabolic risk 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 — Human clinical literature associates adequate vitamin C status with better tissue repair dynamics and ulcer outcomes.
NIH/PubMed — Carr, 2017
Additional / Promising Evidence
✓ Vitamin C + citrus bioflavonoids — Human and mechanistic data suggest bioflavonoids may complement antioxidant networks and microvascular skin support; direct absorption synergy remains mixed.
NIH/PubMed — Kaulmann, 2016
✓ Threonic acid (vitamin C metabolite) — Mechanistic and preliminary evidence suggests it may influence vitamin C handling; robust human RCTs confirming superior uptake are limited.
NIH/PubMed — Hemilä, 2013
✓ Alpha lipoic acid — Functions in the human antioxidant network and may help recycle vitamin C; high-quality human co-supplementation trials remain limited for firm synergy claims.
NIH/PubMed — Shay, 2009
✓ Skin/photodamage (adjunct) — Oral vitamin C–containing regimens show signals for improved skin texture & reduced UV damage.
NIH/PubMed — Pullar, 2013
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, MIT, University of Florida, Oregon State University – Linus Pauling Institute, Tufts, Boston University, Cornell, Columbia, Ohio State — to align with credible science.*
Key Ingredients
-
Vitamin C (Ascorbic Acid) — Immune support, antioxidant protection, collagen formation, and iron absorption. (NIH/PubMed — Carr, 2017)
-
Threonic Acid — Vitamin C metabolite included for potential handling/uptake support (emerging human evidence). (NIH/PubMed — Hemilä, 2013)
-
Alpha Lipoic Acid — Part of the antioxidant network; may help recycle vitamin C (human evidence mixed). (NIH/PubMed — Shay, 2009)
-
Citrus Bioflavonoids — Plant polyphenols that complement antioxidant defenses and microvascular support. (NIH/PubMed — Kaulmann, 2016)
Brief Benefit Bullets
- Daily immune support & shorter common-cold duration (regular users)*
- Potent antioxidant protection*
- Collagen support for skin, vessels & connective tissues*
- Enhances non-heme iron absorption*
- Adjunct support for healthy endothelial function & blood-pressure markers*
- Vegetarian capsules; enhanced formula with bioflavonoids*
-
3rd-party lab tested for purity & potency
Suggested Use
Take 1 capsule 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 vegetarian capsule
• Servings Per Container — 180
• Actives — Vitamin C (Ascorbic Acid) 500 mg; Threonic Acid; Alpha Lipoic Acid; Citrus Bioflavonoids
• Form — Vegetarian capsules
• Free From — Non-GMO, gluten-free, vegan; not from China*
• 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 500 mg vegetarian capsules with rose hips — supports immune health, antioxidant defense, collagen, gums & wound healing. Clinically Studied Ingredients — NIH/PubMed!*
