The two originally characterized FGFs were identified by biological assay and are termed FGF1 (acidic-FGF, aFGF) and FGF2 (basic-FGF, bFGF). In mice, the mammary tumor virus integrates at two predominant sites in the mouse genome identified as Int-1 and Int-2. The protein encoded by the Int-2 locus turned out to be a homologue of the FGF family of growth factors and is now called FGF3. Kaposi sarcoma cells (prevalent in patients with AIDS) were found to secrete a homologue of FGF originally called the K-FGF proto-oncogene, it is now known as FGF4.
Many hormones and their structural and functional analogs are used as medication . The most commonly prescribed hormones are estrogens and progestogens (as methods of hormonal contraception and as HRT ),  thyroxine (as levothyroxine , for hypothyroidism ) and steroids (for autoimmune diseases and several respiratory disorders ). Insulin is used by many diabetics . Local preparations for use in otolaryngology often contain pharmacologic equivalents of adrenaline , while steroid and vitamin D creams are used extensively in dermatological practice.
Many advanced users stack several compounds in order to get maximum results from their cycle. Normally when your stacking these types of products its best to use single compounds instead of premixed stacks. The problem with using a premixed stack is you may get more of one compound than you want. Most of these products have sweet spots. Lets use h-drol for an example according to many of the forums out there 75mg is the sweet spot for this compound. Now lets say you have a halodrol product that is mixed with 10mg of Methylstenbolone. In order to get the proper amount of hdrol you will get more than the recommended dose of M-sten.