胺基酸---那些是良好健康所必需的?
【主要胺基酸<essential amino acids>】是良好健康所必需的,但不能由體內合成,所以必須由飲食得到。【主要氨基酸】共有9個氨基酸,幫助身體創造神經遞質 <neurotransmitters> - 五羥色胺<serotonin>和褪黑素<melatonin>。所有人體必需的氨基酸,可以發現在蔬菜;嚴格的素食主義者的飲食,需要注意以確保適當的水平。 這8個胺基酸是成年人不可少的 1. 異白胺酸 Isoleucine 2. 白胺酸 leucine 3. 離胺酸 lysine 4. 甲硫胺酸 methionine, 5. 苯丙胺酸 phenylalanine 6. 酥胺酸 threonine, 7. 色胺酸 tryptophan 8 纈胺酸 valine 9 組氨酸 histidine 這9個氨基酸再附加精氨酸 arginine 被認為是嬰兒和幼兒必需和不可少的。 amino acid n an organic acid in which one of the CH hydrogen atoms has been replaced by NH2. Amino acids are the building blocks of proteins. amino acid, essential,n the group of amino acids that cannot be synthesized by the organism but are required by the organism. They must be supplied by the diet. Isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are essential for adults; these eight plus arginine and histidine are considered essential for infants and children. amino acid, glucogenicn the group of amino acids that produce enzymes that may be converted to glucose if necessary. amino acid, ketogenicn an amino acid that produces ketone bodies following chemical alteration of its carbon skeleton. amino acid, nonessential,n the group of amino acids that can be synthesized by the organism and are not required in the diet. amino acid pool,n an accumulation of amino acids in the liver and blood that adjusts to meet the body's need for protein and amino acids. 牛奶中含有兩種催眠物質: 一種是色氨酸,能促進大腦神經細胞分泌出使人昏昏欲睡的神經遞質——五羥色胺; 另一種是對生理功能具有調節作用的肽類,其中的“類鴉片肽”可以和中樞神經結合,發揮類似鴉片的麻醉、鎮痛作用,讓人感到全身舒適,有利於解除疲勞併入睡。 |