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Daniel Kelly, Senior Lecturer in Biochemistry, Sheffield Hallam University

What men should know before signing up for testosterone ‘optimisation’

Reshetnikov_art/Shutterstock

Pop-up clinics and glossy adverts are selling men a new message: it is time to “check your T” (shorthand for testosterone levels).

The idea is not about treating medical problems but about “optimising” energy, focus and masculinity. With online services offering home blood tests and fast-track access to treatment, testosterone therapy has shifted from specialist medical care to a supposed lifestyle upgrade.

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