Male with healthy libido before now has none - common problem?

I am in my late 40s and after losing 130lbs have lost my libido as well.  Is this common with other guys as well or has it maybe got more to do with my age?

One, welcome to the XY section of OH.

Secondly, congrats on the 130 pound loss!

Thirdly, hate to hear about the libido thing.  I know I have slowed down in my late 40's and early 50's, where I am now.  Right after surgery a knot hole in a tree was not safe unless it contained a beehive!  Six years out the hormones have calmed down and the trees are once again safe.  Guess I'm getting old. 

I'm having the same problem except my started right after surgery and its kind of worrying because I know my libido was far better then it is now :(