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Younger people can also become deficient, particularly if they don't eat a balanced, nutrient-rich diet
This is uncommon, but it is a reason to address a deficiency before it progresses
This happens inside fat cells when the body needs energy
Davis and Parish, 2013
[59] It is primarily metabolized by the liver enzyme CYP1A2 and to a lesser extent by CYP1A1, CYP2C19, and CYP1B1
[6] [10] You should arrange a GP appointment if you experience: Persistent difficulty achieving or maintaining erections sufficient for sexual activity Sudden onset of erectile problems, especially if accompanied by other symptoms Reduced libido or changes in sexual desire Pain during erection or intercourse Concerns about fertility or reproductive health Psychological distress related to sexual function Your GP will conduct a thorough assessment including medical history, medication review, and examination
