Vitamin C Complete with Bioflavonoids — 1,000 mg per Serving, 100 Capsules — Supports Immune Health & Antioxidant Protection*
LifeSource Vitamins Vitamin C Complete with Bioflavonoids combines clinically studied ascorbic acid with citrus bioflavonoids to support immune function, help reduce common-cold duration with regular use, provide antioxidant protection, aid collagen/wound repair, and enhance non-heme iron absorption.* Produced in FDA-registered, GMP-certified facilities and
3rd-party tested for identity, potency & purity.*
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 39 leading health organizations and insights from 20 top global universities to ensure our guidance aligns with credible science.*
Clinically Studied Benefits (with research)
• Immune support — Vitamin C supports epithelial barrier integrity and leukocyte functions; regular use is associated with shorter common-cold duration. (NIH/PMC — Carr & Maggini, Nutrients 2017)
• Common-cold duration (adjunct) — Meta-analyses of human RCTs show reduced duration/severity with regular vitamin C supplementation. (NIH/PMC — Hemilä, Nutrients 2017)
• Incidence reduction in high-physical-stress groups — Fewer colds in athletes/heavy-exertion settings with prophylactic vitamin C (human RCT syntheses). (NIH/PMC — Hemilä, 2017)
• Antioxidant protection — Ascorbate scavenges reactive oxygen species and helps regenerate other antioxidants; human data show lower oxidative-stress markers. (NIH/PMC — Carr & Maggini, 2017)
• Collagen formation & wound repair — Essential cofactor for collagen hydroxylation; human literature links adequate C to improved dermal matrix and wound outcomes. (NIH/PMC — Pullar, Carr & Vissers, Nutrients 2017)
• Iron absorption — Enhances non-heme iron uptake by reducing Fe3+→Fe2+ and forming absorbable complexes (human mechanisms/evidence). (NIH/PMC — Lane & Richardson, Front Pharmacol 2014)
• Endothelial & cardiometabolic markers — Evidence for improved endothelial-dependent vasodilation and select risk markers with vitamin C. (NIH/PMC — Carr & Maggini, 2017)
• Blood pressure (adjunct) — Meta-analysis of RCTs reports modest BP reductions, especially in hypertensive adults. (NIH/PMC — Juraschek et al., Am J Clin Nutr 2012)
Additional Studies Showing Promising Benefits*
• Citrus bioflavonoids (adjunct) — Human and review-level evidence suggests complementary antioxidant/microvascular support; direct absorption synergy with vitamin C remains mixed. (NIH/PMC — Del Rio et al., Nutrients 2013)
• Skin/photodamage (adjunct) — Oral vitamin C–containing regimens show signals for UV/dermal endpoints; heterogeneity/combination formulas temper certainty. (NIH/PMC — Pullar et al., 2017)
• Respiratory/oxidative-stress contexts — Review-level human evidence suggests supportive roles under oxidative burden (setting/dose dependent). (NIH/PMC — Carr & Maggini, 2017)
Global Evidence & Authoritative Reviews*
• NIH ODS Fact Sheet — Comprehensive overview of vitamin C functions, intake & safety. (NIH ODS)
• Harvard T.H. Chan — Nutrition Source review on vitamin C & health. (Harvard)
• Johns Hopkins Medicine — Vitamin C & antioxidant education. (Johns Hopkins)
We monitor research from the world’s leading institutions — including Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge University, Oxford, Stanford, Yale, MIT, the University of Florida, Oregon State University – Linus Pauling Institute, Tufts, Boston University, Cornell, Columbia, and Ohio State — to ensure our guidance remains aligned with the highest standards of credible science.*
Brief Benefit Bullets
• Daily immune support; helps shorten common-cold duration with regular use*
• Potent antioxidant protection; bioflavonoids provide complementary antioxidant support*
• Collagen cofactor for skin, vessels, bones & wound repair*
• Enhances non-heme iron absorption*
• Adjunct support for endothelial function & healthy blood pressure*
• 3rd-party lab tested for purity & potency
Suggested Use: Take 2 capsules 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 — 2 capsules (1,000 mg vitamin C)
• Servings Per Container — 50
• Form — Veggie capsules
• Free From — Non-GMO, gluten-free, vegan*
• Quality — Third-party tested for identity, potency & purity
Perfect For
• Adults seeking robust immune support & antioxidant protection*
• Individuals supporting collagen/wound repair & iron absorption*
• Those who prefer a capsule with added citrus bioflavonoids*
Key Ingredients
Ascorbic Acid (Vitamin C) — Immune & antioxidant support; adjunct reductions in cold duration with regular use; collagen/wound repair cofactor; enhances non-heme iron absorption.* (NIH/PMC — Carr & Maggini, 2017; NIH/PMC — Hemilä, 2017; NIH/PMC — Lane & Richardson, 2014)
Citrus Bioflavonoids — Promising adjunct antioxidants from citrus; human reviews note microvascular/antioxidant roles, while absorption synergy with vitamin C remains mixed.* (NIH/PMC — Del Rio et al., 2013)
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 Complete with citrus bioflavonoids — immune & antioxidant support; collagen/wound repair; iron-absorption cofactor. Clinically Studied Ingredients — NIH/PubMed!*
