You can buy amino supplements, but many can also be obtained through food.
There are five specific essential amino acids which likely have direct effects on fatty acid metabolisation and increasing energy levels.
Tryptophan, carnitine and phenylalanine are used in various ways in the body. Carnitine is taken by many athletes looking to boost energy levels. Carnitine is actually formed in the body, and is made up of two essential amino acids, called lysine and methionine. It works by funnelling extra energy sources, particularly from fatty acids, into energy-making cells to be processed and used. This is believed to be especially useful during workout programs, helping to burn actual fat for energy rather than just carbohydrate stores.
Isoleucine and L-Leucine are also known to have a big part in energy production, and keeping the brain from feeling fatigued. This helps you push through activities, helping to burn up more of that unwanted fat.
Tryptophan and phenylalanine work in a whole other department. People usually take in extra calories made up of carbohydrates, which inevitably make it impossible to lose extra fat stores. Tryptophan shows promise, reducing cravings for sugars and carbohydrates, which helps to avoid those unnecessary calories. This works together with phenylalanine, which suppresses appetite by releasing the hormone norepinephrine.