All our doctors follow national guidance via the National Institute for Health and Care Excellence (NICE) or the British Society of Sexual Medicine (BSSM). Accordingly, a normal testosterone level should be between 15-30nmol/l, irrespective of age. In the NHS, the lower limit of testosterone is usually set at around 6-8nmol/l however, there is no specific reason for this.
We strongly recommend that all men who are told they have normal testosterone levels, but are symptomatic of testosterone deficiency, should book an appointment to determine whether their total testosterone is actually low. Could it be their free testosterone that’s below target, or is there another issue causing similar symptoms that could be treated?