What Is High-Dose IV Vitamin C?
Vitamin C (ascorbic acid) is an essential water-soluble vitamin with central roles in immune function, collagen synthesis, and antioxidant defense. At standard oral doses, plasma levels are tightly regulated and capped by intestinal absorption.
High-dose intravenous vitamin C bypasses these regulatory limits, achieving plasma concentrations far beyond what oral dosing can reach. At these concentrations, vitamin C exhibits distinct pharmacologic effects — supporting immune cell function, reducing oxidative stress, and, in certain clinical contexts, exhibiting selective pro-oxidant activity against pathogens and abnormal cells.
How It Works
At therapeutic IV concentrations, vitamin C operates through several complementary pathways:
- Scavenges reactive oxygen species and recycles glutathione and vitamin E
- Serves as a cofactor in collagen synthesis — central to skin, vascular, and connective tissue integrity
- Supports neutrophil, lymphocyte, and natural killer cell function
- Modulates inflammatory cytokine production
- Generates transient peroxide in extracellular fluid — a selective pressure against certain pathogens at pharmacologic doses
The Infusion Experience
Patients are seated in a private clinical setting. Most report a mild warming sensation and feel a clear lift in energy in the hours that follow.
In-home infusions are available for established patients on ongoing protocols.
Protocol Details
High-dose vitamin C is administered in a titrated induction series followed by a maintenance cadence. The protocol is used across three primary contexts: immune and acute illness support, general antioxidant maintenance, and integrative oncology support (always administered in direct coordination with the patient’s treating oncology team).
Exact formulation, dosing, and cadence are determined during your physician consultation based on your clinical picture and goals.
What to Expect
Most patients feel a mild warming sensation during the infusion and report improved energy, clearer thinking, and a sense of resilience in the hours that follow. Skin benefits (tone, glow, collagen support) typically emerge over a consistent course of sessions.
No downtime is required. Patients return to normal activity immediately.
Safety & Physician Oversight
All high-dose vitamin C infusions at The FMR are administered under physician supervision. Candidacy is established through medical history review and targeted screening before the first infusion to ensure the protocol is clinically appropriate for you.
The protocol has an excellent safety record across decades of clinical use. Side effects are uncommon and generally limited to mild flushing, transient thirst, or a metallic taste.
Frequently Asked Questions
Why IV instead of oral vitamin C?
Oral absorption of vitamin C plateaus at a ceiling set by the gut — plasma concentrations cannot be raised meaningfully above physiologic levels regardless of how much you take by mouth. IV delivery achieves far higher plasma concentrations, producing pharmacologic effects unreachable orally.
Do I need a referral from my oncologist?
For patients interested in high-dose vitamin C as part of integrative oncology care, yes. We coordinate directly with your oncology team before initiating any protocol in that context. We do not position IV vitamin C as a cancer treatment.
Can I combine this with other IV protocols?
Yes. High-dose vitamin C pairs particularly well with glutathione (administered after the vitamin C session completes), Myers’ Cocktails, and Immune Support IVs.
Is in-home delivery available?
Yes. Established patients on ongoing protocols may receive high-dose vitamin C in-home, administered by our licensed clinical team.