Table 1. Details of high dose IV vitamin C use by survey respondents for the years 2006 and 2008.

	2006			2008
	Mean	Median	Range	Mean	Median	Range
Dose (g/treatment)	28	31	1–200	28	50	1–200
Number of treatments per patient	19	16	1–80	24	16	1–80
Number treated by one practitioner	121	40	1–1150	112	40	1–3000
Duration of treatments (min)	105	90	2–1440	81	90	1–900
Frequency of treatments (once every so many days)	4	3.5	1–7	4	2	1–7
Lowest dose (g/treatment)	12	9	1–60	17	15	1–75
Highest dose (g/treatment)	79	75	5–200	87	95	20–200
Infusion rate (g/min)	0.89	0.5	0.03–25	0.525	0.5	0.028–2.5
Total number of vials of vitamin C used (25g/50ml) (Calculated from survey data)	318,539			354,647
Total number of vials of vitamin C sold by companies in the US (25g/50 ml)	750,000			855,000

Vitamin C is supplied in 50 ml bottles containing 25grams. Estimated total number of doses (bottles) used each year was calculated as the cumulative sum of each practitioners' number of patients×that practitioners' average dose in bottles×that practitioner's average number of doses per patient.