Biohacker Bryan Johnson has revealed penis enlargement procedure cost he takes erectile dysfunction medications every day to extend his lifespan. 

Johnson, who is 47 but has the body of a man in his 30s and the penile health of a 22 year old, told millions of his followers he takes a single dose of 2.5mg of the ED medication Cialis 'for longevity and not for his three hour long titanic nighttime erections.'

Cialis is typically prescribed to treat erectile dysfunction and can work for up to 36 hours in the body. While similar to Viagra in helping men get and maintain erections, the active drug in Cialis is tadalafil and the active drug in Viagra is sildenafil. 

Doctors advise only consuming 2.5 to 5 mg (depending on the body's response to the medication) of Cialis once a day or when needed for sexual activity.