The article below, The Amino Acid Pool, can be found at: https://www.juvel-5.co.uk/juvel-5-info-on-amino-acids/
The amino acid pool
In the beginning God created Heaven and Earth, says the Bible in the book of Genesis. Although chemists and biologists see this differently. They say that the beginning of all life lay in amino acids. We now know that the maintenance of all life is dependent on amino acids. An increasingly poor diet of one-sided, chemically-altered or worthless nutrients contributes to an increasing shortage of essential amino acids. This has grave consequences, which subtly arise.
Let’s take a closer look then at amino acids. As contemporary science has determined, there are more than 250 amino acids. Eight of these are essential to humans, namely, methionine, valine, isoleucine and leucine, lysine and phenylalanine, tryptophan as well as threonine. The body always requires all eight at the same time, as no amino acid can function without the others. An excess of one amino acid will result in its excretion, if it is unable to find the other necessary amino acids to link up. At the same time, a shortage of only a single essential amino acid is enough to cause the seven excessive ones to be excreted. They are then of no use to the body. Alongside the essential amino acids are the semi-essential and non-essential ones. It is a fact, for example, that sick people or children need next to the eight essential amino acids also the semi-essential ones, namely arginine and histidine. Amino acids are often spelled beginning with the letter ‘L’, followed by a hyphen (-). The essential amino acids can only be found in foods. For example, a chicken egg contains all essential amino acids. Some however can be found only seldom in foodstuffs. The body can therefore produce them given certain precursors.