Vitamin C
Calcium Ascorbate (Buffered Vitamin C)
IMMUNE, SKIN & ANTIOXIDANT SUPPORT
Vitamin C is the most widely recognized immune nutrient and a powerful water-soluble antioxidant. It supports immune defense, collagen synthesis for healthy skin and joints, iron absorption, and cardiovascular health. This is the buffered form that's gentle on stomachs.
30-day supply
Key Benefits
Powerful antioxidant supporting immune defense
Promotes collagen synthesis for skin and joints
Enhances iron absorption from plant sources
Supports cardiovascular health
Supports These Goals
Linked Biomarkers
Our blood test can measure these markers to personalize your dose
Why you'll love it
Vitamin C does so much more than fight colds. It's a cofactor in at least eight enzymatic reactions, including collagen synthesis (which is why sailors with scurvy lost their teeth — collagen literally holds your body together). It's one of the most potent water-soluble antioxidants, neutralizing free radicals in your blood and tissues before they can damage cells.
For immune support, vitamin C concentrates in immune cells at levels 10-100 times higher than in blood plasma. During an infection, immune cells rapidly consume their vitamin C stores as they mount a defense. Regular supplementation keeps those stores topped up so your immune system can respond with full force when needed. Meta-analyses show vitamin C supplementation reduces the duration of colds and may reduce severity.
Vitamin C also dramatically enhances the absorption of non-heme iron (the form found in plant foods and supplements), making it essential for vegetarians and anyone managing iron levels. It supports collagen production for skin elasticity and wound healing, and protects LDL cholesterol from oxidation — a key step in cardiovascular disease.
Clinical Evidence
Our recommendations are grounded in published clinical research. Here are key studies supporting the benefits of Vitamin C.
Vitamin C reduces risk of death, heart disease, and cancer
Vitamin C intake and multiple health outcomes: an umbrella review of systematic reviews and meta-analyses
2022
High-dose vitamin C cuts cold severity by 15%
Vitamin C reduces the severity of common colds: a meta-analysis
2023
Study titles shown are simplified summaries of the original research for readability. Original titles are shown in italics below each heading. All studies cited are from peer-reviewed journals indexed in PubMed. Links open in a new tab to the original source. These studies are provided for informational purposes and do not constitute medical advice.
How much do I really need?
Take one 1,000mg capsule daily with food. This buffered form (Calcium Ascorbate) is gentle on the stomach, unlike pure ascorbic acid. During illness or high stress, some people take an additional capsule. Vitamin C is water-soluble, so excess is excreted — but doses above 2,000mg/day may cause digestive discomfort.
Safety & Transparency
Full transparency — here's exactly what's in every capsule, verified by our manufacturer.
Third-Party Tested
Every batch is independently tested by ISO-17025 accredited labs for purity, potency, and contaminants.
Doctor Formulated
Designed by healthcare professionals using evidence-based research and clinical expertise.
cGMP Certified
Manufactured in cGMP & UL certified, FDA-registered facilities with a flawless inspection record.
As with any natural health product, you should consult your healthcare practitioner on the use of this product. Store product in a cool and dry place. Keep out of reach of children. If you experience an adverse event or allergic reaction, discontinue use immediately and contact a healthcare professional.
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