Hello, I got my bottles of Folligen Solutions last week, with a sample bottle of Hair Signals. What exactly is its difference when compared to Folligen Solutions? Are they complementary products or should one be treated as a substitute to the other? Btw, I live here in Southeast Asia and Dr. Pickart's Skin Biology really ships fast. The products were also packaged in an excellent condition. Thanks

Hair Signals is - hopefully - a successor to Folligen.

It has more DHT inhibitors and a tea extract.