High-Dose Vitamin C IV (50g)

The clinic's highest-dose vitamin C infusion, delivering 50 grams of ascorbic acid intravenously over a 60-minute session. At this pharmacological concentration, plasma vitamin C levels reach ranges studied in clinical research for their pro-oxidant and immune-modulating properties.

The 50g vitamin C IV represents HADA NO CLINIC's most intensive ascorbic acid protocol, delivering five times the concentration of the standard 10g infusion in a single session. At 50 grams, intravenous vitamin C produces plasma concentrations in the range of 10-20 millimoles per litre — levels that generate extracellular hydrogen peroxide through autoxidation, a mechanism that has been the subject of extensive research in oncological and immunological contexts. This dose requires a full 60-minute infusion to administer safely, with the ascorbic acid dissolved in a larger volume of sterile saline to maintain osmotic balance and reduce the risk of vein irritation. The clinic monitors patients throughout the session and may check vital signs before and after the drip. First-time patients at this dose level undergo screening for G6PD deficiency, a genetic enzyme disorder that can cause red blood cell breakdown when exposed to high oxidative loads. Kidney function assessment may also be performed, as ascorbic acid is metabolised to oxalate and cleared renally. Beyond the research context, the 50g protocol is used by patients seeking maximum immune support during acute illness recovery, periods of intense physical training, or as part of a broader longevity-focused IV programme. At ¥17,380, it remains significantly more affordable than comparable high-dose vitamin C infusions at many Tokyo wellness clinics, reflecting HADA NO CLINIC's positioning as an accessible provider of evidence-informed IV therapy. Patients considering the 50g dose are generally advised to start with the 10g infusion to assess tolerance and establish a baseline response. The clinic recommends spacing sessions at least one to two weeks apart and maintaining good hydration before and after each treatment. Both Koenji and Kojimachi locations offer this treatment daily, with the consultation fee waived from the second IV visit onward.