Taking antioxidants to prevent corporal fibrosis and maintain corporal muscle mass has been suggested and often used. Avoidance of trauma and other intercurrent disease is obvious, but hard to plan. Avoiding these deficiencies would therefore have preventive value. Careful of bike riding - chronic compression of pudendal nerves and arteries has been shown to interefere with erectile ability. Use a padded and wide seat.
Control diabetes to prevent diabetic neuropathy.
Occult disc disease should be kept in mind. Cases of voiding dysfunction presenting as the only symptom of lumbar disc have been documented. Similarly, we have all seen ED patients with a history of disc disease, currently without pain, who demonstrate classic denervation hypersensitivity to pharmacologic injection during penodynamics. Neurosensory disorders, such as multiple sclerosis, are often associated with sexual dysfunction. Pending development of genetic profiling and therapy for these, a seasoned degree of diagnostic acuity is the best preventive factor.