一种或多种营养素的缺乏(如叶酸或维生素b6)将破坏情绪，因为这些营养物质辅助大脑功能的发挥，或帮助制造调节情绪神经化学物质。
It's too little of one or more nutrients, such as folic acid or vitamin B6, that undermines mood, since these nutrients aid in brain function or help manufacture nerve chemicals that regulate mood.
神经传递素是一种在神经细胞间传递信号的化学物质，在ADHD患者中，这种化学物质常常是指多巴胺，该物质的作用是调节愉悦和满足感。
A neurotransmitter is a chemical that carries messages between nerve cells and, in the case of ADHD, that chemical is often dopamine, which controls feelings of reward and pleasure.
举一个极端的例子，有一个研究表明，制造大脑化学物质5 -羟色胺(“百忧解”等抗抑郁药所调节的神经递质)的酶会发生变异。
An extreme example comes from a study that described a mutation in the enzyme that manufactures the brain chemical serotonin (the neurotransmitter on which antidepressants like Prozac ACTS).
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