Are you worried about your testosterone levels dropping as you get older? Well, sorry to say it, but you should be! Testosterone levels tend to lower in the body at around the age of 30, sometimes bringing with it difficult symptoms that can be uncomfortable from both a physical and emotional level. If you're around 30, look out for different symptoms that include thinning or loss of hair, reduced sex drive, difficulty in maintaining or obtaining an erection, and even decreased bone density. If you're experiencing these symptoms, you can get your testosterone levels checked and start a therapy treatment.
DHT is a potent agonist of the AR, and is in fact the most potent known endogenous ligand of the receptor. It has an affinity (K d ) of to nM for the human AR, which is about 2- to 3-fold higher than that of testosterone (K d = to nM)  and 15–30 times higher than that of adrenal androgens .  In addition, the dissociation rate of DHT from the AR is 5-fold slower than that of testosterone.  The EC 50 of DHT for activation of the AR is nM, which is about 5-fold stronger than that of testosterone (EC 50 = nM).  In bioassays , DHT has been found to be - to 10-fold more potent than testosterone. 
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