iÂ·onÂ·ic bond. A chemical bond formed between two ions with opposite charges. Ionic bonds form when one atom gives up one or more electrons to another atom. These bonds can form between a pair of atoms or between molecules and are the type of bond found in salts.
The answer is supernovae. In a supernova explosion, neutron capture reactions take place (this is not fusion), leading to the formation of heavy elements. This is the reason why it is said that most of the stuff that we see around us come from stars and supernovae (the heavy elements part).
Juhn explains that HMB is a substance formed naturally when the body breaks down the amino acid leucine. Amino acids are the building blocks of protein, and proteins are the building blocks of muscle. To make muscle, your body has to undergo what is called protein synthesis, Juhn says.