Orexin B
Also known as Hypocretin-2, Orexin-B
An endogenous hypothalamic neuropeptide studied for arousal, wakefulness, appetite, reward signaling, and sleep-wake regulation through orexin receptors.
Overview
Orexin B, also called hypocretin-2, is an endogenous neuropeptide produced in the hypothalamus. It is part of the orexin system, which helps regulate wakefulness, arousal, appetite, and reward-related behavior.
The Science
Orexin biology is central to sleep-wake control. Loss of orexin signaling is strongly linked to narcolepsy, while orexin receptor antagonists are used clinically for insomnia.
- Wakefulness - orexin neurons stabilize arousal states.
- Appetite and energy balance - hypothalamic integration of feeding and arousal.
- Reward and motivation - orexin pathways interact with dopaminergic circuits.
Evidence Snapshot
Orexin B is a neurobiology research peptide, not a general stimulant. The broader orexin system is clinically important, but peptide products require careful distinction from approved orexin receptor drugs.
Related
More in Cognitive
Adamax
Research compoundCognitive
A Semax-derived cognitive research peptide marketed in nootropic communities, with claims centered on neurotrophic signaling, focus, mood, and stress resilience.
Cerebrolysin
InvestigationalCognitive
A parenteral preparation of small peptides and amino acids derived from porcine brain protein, used clinically for decades across stroke, dementia, and traumatic brain injury recovery in many countries outside the US.
Dermorphin
Research compoundCognitive
A potent opioid heptapeptide originally isolated from frog skin secretions and studied as a tool compound for mu-opioid receptor pharmacology and analgesia research.