Chunk #0 — Heritability of Addictions
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Evidence from family, adoption, and twin studies converges on the relevance of genetic factors in the development of addictions including SUDs and gambling.7–13 Weighted mean heritabilities for addictions computed from several studies of large cohorts of twins are shown in Fig. 1.14 Heritability is lowest for hallucinogens (0.39) and highest for cocaine (0.72).