GABA含量高时，神经元无法形成新的连结，同时大脑的学习能力也会降低；而含量低时，神经细胞可自由形成新的连结。
High levels of GABA can prevent neurons forming new connections - and slow down the brain's ability to learn - while low levels free nerve cells to create new brain circuitry.
“自由基(比如由阳光照射而形成的粒子)会损害皮肤细胞膜，更会对细胞DNA构成潜在的威胁。”Heller说。
"Free radicals — like the kind formed from sun exposure — damage the membrane of skin cells, potentially allowing damage to the DNA of that cell," says Heller.
促氧化作用将产生自由基并形成过氧化氢，而科学家假定后者可以杀伤肿瘤细胞。
Prooxidants would generate free radicals and the formation of hydrogen peroxide, which, the scientists hypothesized, might kill tumor cells.
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