which two neurotransmitters have roles in appetite suppression?

Dopamine and serotonin are the two primary neurotransmitters known for their roles in appetite suppression. They work in the brain's reward and satiety centers to reduce hunger signals and promote feelings of fullness.

How They Suppress Appetite

Dopamine acts in the hypothalamus and mesolimbic pathway, curbing food cravings by modulating reward responses to eating—essentially making overindulgence less appealing. Serotonin, via 5-HT2C receptors, activates pathways like POMC neurons that signal satiety while inhibiting hunger- promoting NPY/AgRP neurons.

• Dopamine's mechanism : Enhances energy expenditure and reduces intake by stimulating adrenergic/dopaminergic receptors centrally.

• Serotonin's mechanism : Central activation directly suppresses appetite, as seen in drugs targeting these receptors for weight loss.

Recent studies (up to 2025) confirm these roles persist in obesity research, though norepinehrine often pairs with dopamine in sympathomimetics.

Quiz Context and Common Confusion

This question mirrors psychology or biology quizzes where options include:

Option| Neurotransmitters| Correct?
---|---|---
A| Dopamine; Acetylcholine| No 6
B| Dopamine; Norepinephrine| Partial (norepinephrine aids, but not primary pair) 8
C| Dopamine; Serotonin| Yes 19
D| Norepinephrine; GABA| No

Forums like Reddit note MCAT-style traps mixing peptides (e.g., PYY) with neurotransmitters. Always distinguish: neurotransmitters are small molecules like these, not hormones.

Broader Insights

While orexins promote appetite, GLP-1 circuits indirectly boost serotonin/dopamine effects. Trending 2026 discussions link them to new GLP-1 drugs (e.g., semaglutide) mimicking suppression.

TL;DR : Dopamine and serotonin suppress appetite; dopamine curbs reward- driven eating, serotonin boosts fullness.

Information gathered from public forums or data available on the internet and portrayed here.