Immune + Antioxidant + Collagen
Ascorbic Acid
Vitamin C supports collagen biosynthesis, immune defense, antioxidant recycling, and iron metabolism.
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Overview
Ascorbic Acid 500 mg/mL
Ascorbic acid is an essential water-soluble micronutrient that humans cannot synthesize endogenously due to the absence of L-gulonolactone oxidase, the terminal enzyme in the hepatic vitamin C biosynthetic pathway. It must be supplied entirely through diet or supplementation. Oral vitamin C absorption is limited by saturable intestinal sodium-dependent vitamin C transporters (SVCT1), capping plasma concentrations regardless of dose. Injectable ascorbic acid bypasses this absorption ceiling, delivering plasma concentrations orders of magnitude higher than oral supplementation can achieve, enabling its full pharmacological activity as an enzyme cofactor, antioxidant, and immune modulator.
Mechanism of Action
Ascorbic acid functions as a two-electron reducing agent and the obligate cofactor for copper-dependent and iron-dependent monooxygenase and dioxygenase enzymes. In collagen biosynthesis, it is the required electron donor for prolyl-4-hydroxylase and lysyl hydroxylase, enzymes that hydroxylate proline and lysine residues in procollagen alpha chains to enable triple-helix formation and fibrillar cross-linking. Without ascorbate, unhydroxylated procollagen is unstable, degraded intracellularly, and results in structurally deficient collagen. Ascorbic acid is also required for carnitine biosynthesis via the hydroxylation of trimethyllysine and gamma-butyrobetaine, linking vitamin C directly to mitochondrial fatty acid oxidation. It regenerates alpha-tocopherol (vitamin E) from its tocopheroxyl radical, amplifying lipid-phase antioxidant defense.
Injection
Administered intramuscularly ensures complete absorption and immediate bioavailability.
Information presented here is for educational purposes only and not intended to replace or substitute guidance from a healthcare provider. Compounded medications are not FDA-approved nor evaluated by the FDA for safety, efficacy, or quality.
Benefits
Collagen Biosynthesis
Obligate cofactor for prolyl-4-hydroxylase and lysyl hydroxylase, the enzymes required for procollagen hydroxylation and stable triple-helix formation in all collagen subtypes.
Immune Defense
Accumulates to millimolar concentrations in immune cells, supporting neutrophil chemotaxis, phagocytic oxidative burst, lymphocyte proliferation, and cytokine-driven antiviral defense.
Antioxidant Recycling
Regenerates vitamin E from its tocopheroxyl radical and directly neutralizes reactive oxygen and nitrogen species in aqueous compartments, sustaining systemic antioxidant network integrity.
Iron Absorption
Reduces dietary non-heme Fe3+ to absorbable Fe2+ via Dcytb at the duodenal brush border, directly enhancing iron bioavailability and supporting hemoglobin and myoglobin synthesis.
Carnitine Synthesis
Required cofactor for the hydroxylation steps in carnitine biosynthesis from trimethyllysine, linking ascorbate status directly to mitochondrial fatty acid oxidation and cellular energy production.
Individual results may vary. Benefits described are based on clinical and pharmacological evidence and do not constitute a guarantee of treatment outcomes. All treatment requires evaluation and approval by a licensed provider.
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FAQs
What is Ascorbic Acid Injection?
Ascorbic Acid Injection is a prescription therapy used for vitamin C support.
Who should use Ascorbic Acid Injection?
Patients seeking support for vitamin C support may qualify after evaluation by a licensed provider
Does Ascorbic Acid require a prescription?
Yes. This is a compounded injectable preparation at 500 mg/mL requiring a valid prescription from a licensed provider. A telehealth consultation is required before dispensing. Ships to all 50 states.
What are the possible side effects?
Rapid IV infusion may cause flushing, nausea, headache, or dizziness and should be avoided. Intramuscular administration is generally well tolerated, with injection site soreness as the most common effect. High-dose parenteral ascorbic acid may cause oxalate nephrolithiasis in susceptible patients and transient osmotic diuresis. Patients with G6PD deficiency may experience hemolysis at high doses.
Who should not use Ascorbic Acid?
Not for patients with G6PD deficiency at high doses due to risk of hemolytic anemia. Patients with a history of kidney stones, particularly calcium oxalate stones, require provider evaluation given ascorbate's conversion to oxalate. Patients with iron overload conditions including hemochromatosis should not use high-dose ascorbic acid without specialist evaluation given its iron absorption-enhancing activity.
Are there any drug interactions?
High-dose ascorbic acid may reduce the efficacy of certain chemotherapy agents and must not be used during active cancer treatment without oncologist approval. It enhances non-heme iron absorption and may worsen iron overload in patients with hemochromatosis or on high-dose iron therapy. May interfere with glucose oxidase-based blood glucose monitoring at very high plasma concentrations. Concurrent use with deferoxamine requires provider evaluation.
Is Ascorbic Acid safe if I have a pre-existing medical condition?
Patients with renal impairment require careful evaluation given oxalate accumulation risk and reduced renal clearance of ascorbate metabolites. Patients with hemochromatosis, thalassemia, or sideroblastic anemia require specialist review before high-dose use. Patients with active malignancy must obtain oncologist clearance. Diabetic patients should note that high-dose ascorbic acid may interfere with certain glucose monitoring systems.
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