Peptides are formed by joining amino acids and they are shorter in 
sequence than the larger ones that are known as proteins. Some of the 
most important and basic functions of the body are performed by 
peptides. The research laboratories in certain countries have developed 
various categories of peptides such as melanotan 2, which is responsible
 for lightening the skin tan and also used as a preventive treatment 
against various skin disorders that require medicines with skin 
lightening properties and as cure for skin cancers. Similarly, 
Bremelanotide is another drug, which is under clinical trial and intends
 to cure diseases such as sexual dysfunction and problems of erection. 
Although these researched compounds have proved their efficiency to a 
certain extent, the side-effects of these peptides are still to be dealt
 with by research scientists. 
Peptide has emerged as the most interesting compound that can be used 
for various purposes and it is undoubtedly true that it has successfully
 created interest among research scientists for more reasons than one. 
However, irrelevant sale of products containing Melanotan 2on the 
internet has come under scanner for causing serious health maladies and 
abandoned by several countries for such reasons. This compound, which 
was originally developed in the University of Arizona, is still under 
trial for its effectiveness along with the negative effects of using 
them in a random manner for lightening the color of the skin. On the 
other hand, misuse of a peptide such as Mechano growth factor has been 
noticed among people involved in sport activities as it leads to 
widespread growth of muscles. 
Thus, Mechano growth factor is 
identified as having potential for doping and sometimes to beat the 
weakening of muscles with old age. If a player loses focus on the game 
and tries using compounds and drugs like this for growing muscles, human
 health is sure to take a major setback. The results of using this 
peptide has come out as a result of extensive research that has been 
carried out across US and people should be careful about using them for 
their visible properties rather than exercising caution about its 
constant misuse. One of the revolutionary peptide fragments of the 
recent times, which is identified as HGH Fragment 176-191 is said to 
contain fat regulating properties or fat metabolism.