The physiology of endocrine systems with aging

madman

Super Moderator
Conclusions

Changes in the activities of various endocrine systems occur during ageing, including altered hormonal secretory patterns and modulation of feedback sensitivity, summarised in figure 1. These physiological changes should be considered when interpreting hormone concentrations in older individuals with and without endocrine disease. However, the magnitude of these changes varies considerably between individuals, and reference values for hormone concentrations at older ages should be established. Differentiating whether these changes are due to the ageing process, or whether they are related to other processes, such as intercurrent chronic diseases, inflammation, nutritional status, or a combination of these, is difficult. The effect of these age-related changes on body composition,
physical function, emotional wellbeing, morbidity, and finally mortality is only partly known. Some of the changes could be a beneficial adaptation to ageing, whereas others are not. Future studies should aim to explore whether endocrine alterations are maladaptive or adaptive to ageing.
 

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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.

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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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