Amusement

Amusement

beta-endorphin

90%

dopamine

85%

met-enkephalin

85%

oxytocin

85%

leu-enkephalin

80%

anandamide

80%

gaba

75%

serotonin

70%

alpha-endorphin

70%

gamma-endorphin

70%

norepinephrine

65%

melatonin

60%

beta-neoendorphin

50%

alpha-neoendorphin

40%

dynorphin a (1-17)

35%

dynorphin a (1-13)

35%

dynorphin b

35%