Dopamine levels can be influenced by genetics and environment from "summary" of The Molecule of More by Daniel Z. Lieberman, MD,Michael E. Long
Dopamine levels are not solely determined by genetics, as many people are led to believe. While it is true that genes play a significant role in shaping our dopamine systems, environmental factors also have a profound impact on how much dopamine our brains produce. Genetics can certainly predispose individuals to have certain levels of dopamine. Some people may be genetically inclined to have higher levels of dopamine, making them more prone to seeking out new experiences and taking risks. On the other hand, some individuals may have genetic variations that result in lower levels of dopamine, leading them to be more cautious and risk-averse. ...
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