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Low Testosterone

Men, women in more satisfying relationships have lower testosterone

ANN ARBOR—Many people assume that the more testosterone, the better, but a new University of Michigan study finds that might not always ...

Study Calls for Standardization in Measuring Testosterone Levels

Testosterone blood tests, long questioned as being unreliable, should be used in conjunction with a physical exam to determine treatment ...

Self-employed men have higher levels of testosterone, study finds

An abundance of the sex hormone testosterone is associated with being self-employed, a study from the University of Birmingham, University of Surrey and the University of Adelaide study has found. ... Full story

Endocrine Society Calls for Large-Scale Studies to Evaluate Testosterone Therapy Risks

Aging men weighing treatment should be warned about cardiovascular events ... Full story

Use of testosterone therapy linked to heart attacks in men under 65, study shows

By Mark Wheeler - You may have seen one of the many advertisements geared toward men asking if they suffer from "low T" — low testosterone levels that, according to the ads, can result in lost sex drive, diminished energy and moodiness. ... Full story

Many Men Start Testosterone Therapy without Clear Medical Need

Study finds increased testing among men with normal hormone levels ... Full story

Midrange testosterone levels better for older men

Optimal levels of testosterone - meaning neither low nor high - in older men are associated with better survival, according to a study recently published by a team of UWA researchers in the Journal of Clinical Endocrinology and Metabolism. ... Full story

In men, high testosterone can mean weakened immune response, study finds

BY BRUCE GOLDMAN - Scientists at the Stanford University School of Medicine have linked high testosterone levels in men to a poor immune response to an influenza vaccine. ... Full story

Testosterone-Regulated Genes May Affect Vaccine-Induced Immunity

NIH-Funded Study Helps Explain Differences in Male and Female Responses to Vaccines ... Full story

Increased Cardiovascular Risk in Men Using Testosterone Therapy Prompts Warning

PHILADELPHIA — Men taking testosterone therapy had a 29 percent greater risk of death, heart attack and stroke according to a study of a "real world" population of men. An accompanying editorial in JAMA by an endocrinologist with the Perelman School of Medicine at the University of Pennsylvania notes that the mounting evidence of a signal of cardiovascular risk warrants cautious testosterone prescribing and additional investigation. ... Full story

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