Ways to increase libido.......
First off....is she on any type of anti-depressant? This can decrease sex drive greatly.
There is an oil called Zestra or Zetra........something like that........I believe it is still under research but she should ask her doctor about it.....it is used like Androgel but much more safe.
Exercise is always good......and I've heard yoga specifically can really help......the deep breathing and meditation increases blood flow...yada yada yada.
Good diet....a given. A Good diet benefits a person in pretty much every way!
Some good vitamins for libido.....vitamin e....helps in production of hormones. Essential fats have lots of vitamin e so tell her to get her EFA's also.
Vitamin C and B complex also!
There are alot of over the counter natural pills that supposedly increase libido. I'm not sure if they work or not.......I'm 29.....my sex drive is pretty damn good at this point in time!
I still think she should ask her doctor for specific medical treatments if everything else doesn't work.
One last thing.....sex shops offer lots of gizmos and gadgets that women can use to strengthen their kegal muscles......or they can do kegal exercises without the gizmos also. Benwa balls are popular. I can get horny just doing kegal exercises.....and it is more fun with the gizmos!
Let us know what happens with your friend! And encourage her to join up and ask the questions herself!