Testosterone levels in teenagers

Hey guys does anyone know what the normal testosterone levels should range in a healthy 18 year old . .? My sons at 402 seems low to me

Ask the doctor that gave you those results.

I'm asking here any one know ?

Up around 900ng/dl for a young healthy male. Your son has the test levels of a 65 year old healthy male.

"The NERI (New England Research Institute) study examined, amoung other things, men in the age bracket of 65-69 and found that in 1988 average testosterone levels were 503 ng/dl but in 2003, fifteen years later, the average levels had fallen to 423."

wheres his free test at?, also is he a pretty lean kid?

If you have his Albumin, SHGB, and total Test, you can use this online calculator to determine his Free and Bioavailable values.

Free & Bioavailable Testosterone Calculator

http://www.issam.ch/freetesto.htm

Thanks for reply guys . I don't have his free test and yes he is pretty lean

if he is lean, he may be making alot of free test from his total level, whereas if he were fatter, hed have more fat tissue to convert testosterone to estrogen via aromatase enzyme. that would mean his balls would have to pump out a higher level to keep enough free test in circulation.