What Is a High-Dose Vitamin C IV?
Updated October 20, 2026 · 3 min read
Vitamin C is one of the most familiar nutrients out there. Orange juice. Immune packets. Chewable tablets.
But there's a limit to how much vitamin C your body can absorb by mouth. A High-C IV at iCRYO Westminster bypasses that limit.
Here's what a high-dose vitamin C IV is, how it works and who it's for.
What Is Vitamin C?
Vitamin C (ascorbic acid) is an essential nutrient your body can't make on its own. It plays important roles in:
- Normal immune function
- Antioxidant protection
- Collagen production for skin and connective tissue
- Iron absorption
Why Oral Vitamin C Has Limits
When you take vitamin C by mouth, your gut controls how much gets absorbed. As the dose goes up, the percentage absorbed goes down. Your kidneys also clear excess quickly.
That's why even large oral doses can't raise blood levels very high. Read IV Vitamin C vs. Oral Vitamin C.
How a High-C IV Works
An IV delivers vitamin C straight into your bloodstream, bypassing digestion. That allows blood levels many times higher than oral doses can achieve.
What to Expect
- G6PD screening. A required blood test before your first high-dose infusion. Read Why You Need a G6PD Test.
- Health review with our medical team.
- IV placement, a quick pinch.
- A slow infusion while you relax.
- Back to your day with no downtime.
Who Uses High-C IV Therapy?
- People wanting extra immune support during cold and flu season
- Frequent travelers
- People focused on antioxidant support and healthy aging
- Those supporting skin health and collagen
See High-Dose Vitamin C IV Benefits.
Who Should Not Get High-Dose Vitamin C?
High-C IVs may not be safe if you:
- Have G6PD deficiency
- Have a history of kidney stones or kidney disease
- Have iron overload conditions
- Are pregnant or breastfeeding (talk with your doctor)
Our medical team screens every client.
Looking for a Lighter Option?
A standard IV infusion with vitamin C and other nutrients may be a good fit if you don't need a high dose. Read Which IV Drip Is Right for You?
Vitamin C IV Myths vs. Facts
Myth: "Taking more vitamin C pills is just as good." Fact: Your gut limits how much vitamin C you absorb. As the oral dose goes up, the percentage absorbed goes down. IV delivery bypasses that limit.
Myth: "Vitamin C is harmless at any dose." Fact: High-dose IV vitamin C can be dangerous for people with G6PD deficiency, which is why screening is required.
Myth: "A High-C IV prevents you from getting sick." Fact: Vitamin C supports normal immune function, but no IV guarantees you won't catch a cold. It works best alongside sleep, hydration and healthy habits.
Myth: "All IV drips contain the same amount of vitamin C." Fact: Standard drips contain modest amounts. A High-C infusion is specifically designed to deliver a much higher dose.
Ready to give your immune system extra support?
High-C IV Infusion in Westminster, CO
iCRYO Westminster is at 14613 Orchard Pkwy #200, Westminster, CO 80023, just off I-25 with free parking. We welcome clients from Broomfield, Thornton, Northglenn, Arvada, Federal Heights and north Denver.
Questions? Call (720) 222-0224.
High-C IV Infusion FAQs
What is a High-C IV?
A High-C IV is an infusion that delivers a high dose of vitamin C directly into your bloodstream, reaching levels far higher than oral vitamin C can.
Why do I need a G6PD test for high-dose vitamin C?
People with G6PD deficiency can experience a serious reaction called hemolysis with high-dose IV vitamin C. A simple blood test checks for it before treatment.
How long does a High-C IV take?
High-dose vitamin C is infused slowly, so sessions often take longer than a standard IV drip. Our team will let you know what to expect.
Who should not get high-dose vitamin C IV?
People with G6PD deficiency, a history of kidney stones or kidney disease, or certain other conditions may not be candidates. Our medical team will screen you.
iCRYO Westminster Team
The iCRYO Westminster team helps clients across the north Denver metro look and feel their best.
Related Articles
High-Dose Vitamin C IV Benefits
High-dose vitamin C IVs support immune health, antioxidant protection and collagen. See the benefits, research and who it's for in Westminster, CO.
IV Vitamin C vs. Oral Vitamin C: What's the Difference?
Your gut limits how much vitamin C you absorb from pills. IV vitamin C bypasses that limit. Compare absorption, blood levels and when each makes sense.
Why You Need a G6PD Test Before a High-Dose Vitamin C IV
High-dose IV vitamin C can be dangerous for people with G6PD deficiency. Learn what G6PD is, how the test works and what to expect in Westminster, CO.
Learn more about High-C IV Infusion in Westminster, CO
View the High-C IV Infusion service page →