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Br J Cancer. Jul 2000; 83(1): 95–97.
Published online Jun 2, 2000. doi:  10.1054/bjoc.2000.1152
PMCID: PMC2374537
Hormones and diet: low insulin-like growth factor-I but normal bioavailable androgens in vegan men
N E Allen,1 P N Appleby,1 G K Davey,1 and T J Key1
1Cancer Epidemiology Unit, Imperial Cancer Research Fund, Gibson Building, Radcliffe Infirmary, Woodstock Road, Oxford, OX2 6HE, UK
Received November 30, 1999; Revised February 7, 2000; Accepted February 8, 2000.
Mean serum insulin-like growth factor-I was 9% lower in 233 vegan men than in 226 meat-eaters and 237 vegetarians (P = 0.002). Vegans had higher testosterone levels than vegetarians and meat-eaters, but this was offset by higher sex hormone binding globulin, and there were no differences between diet groups in free testosterone, androstanediol glucuronide or luteinizing hormone. © 2000 Cancer Research Campaign
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