Effects of long-term treatment with testosterone on weight and waist size

Nelson Vergel

Founder, ExcelMale.com
Effects of long-term treatment with testosterone on weight and waist size in 411 hypogonadal men with obesity Classes I-III: Observational data from two registry studies

Full Paper: http://www.nature.com/ijo/journal/vaop/naam/pdf/ijo2015139a.pdf


TRT waist.webp

Background/Objectives

Long-term testosterone replacement therapy (TRT) up to five years has been shown to produce progressive and sustainable weight loss in hypogonadal men. This study investigated effects of long-term TRT up to eight years in hypogonadal men with different obesity classes.

Subjects/Methods

From two independent observational registries we identified a total of 411 obese, hypogonadal men receiving TRT in urological clinics. The effects of TRT on anthropometric as well as metabolic parameters were studied for a maximum duration of 8 years, mean follow-up: 6 years. All men received long-acting injections of testosterone undecanoate in 3-monthly intervals.

Results

In all three classes of obesity, T therapy produced significant weight loss (WL), decrease in waist circumference (WC) and BMI. In patients with class I obesity, mean weight decreased from 102.6±6.4 to 84.1±4.9 kg, change from baseline: −17.4±0.5 kg and -16.8±0.4%. WC in this group of patients decreased from 106.8±7.4 to 95.1±5.3 cm, change from baseline: −10.6±0.3 cm. BMI decreased from 32.69±1.4 to 27.07±1.57, change from baseline: −5.52±0.15 kg/m[SUP]2[/SUP]. In patients with class II obesity, weight decreased from 116.8±6.9 to 91.3±6.3 kg, change from baseline: −25.3±0.5 kg and −21.5±0.4%. WC decreased from 113.5±7.5 to 100.0±5.4 cm, change from baseline: −13.9±0.4 cm. BMI decreased from 37.32±1.45 to 29.49±1.71, change from baseline: −8.15±0.17 kg/m[SUP]2[/SUP]. In patients with class III obesity, weight decreased from 129.0±5.6 to 98.9±4.8 kg, change from baseline: −30.5±0.7 kg and −23.6±0.5%. WC decreased from 118. 5±5.6 to 103.8±4.9 cm, change from baseline: −14.3±0.4 cm. BMI decreased from 41.93±1.48 to 32.46±1.59, change from baseline −9.96±0.29 kg/m[SUP]2[/SUP].

Conclusions

Testosterone therapy appears to be an effective approach to achieve sustained weight loss in obese hypogonadal men irrespective of severity of obesity. Based on these findings we suggest that T therapy offers safe and effective treatment strategy of obesity in hypogonadal men.
 

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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