Stimulators
- Amino acids (particularly the glucogenic amino acids: alanine, serine, glycine, cysteine, and threonine)
- CCK, gastrin
- Cortisol
- Exercise
- Infections
- Other stresses
- 13-Adrenergic stimulators Theophylline
- Acetylcholine
Inhibitors
- Somatostatin
- Secretin
- FFA
- Ketones
- Insulin
- Phenytoin
- a-Adrenergic stimulators
- GABA
source - Ganong's review of medical physiology