Leu-enkephalin vs Insulin Aspart
Head-to-head comparison of Leu-enkephalin (Tyr-Gly-Gly-Phe-Leu) and Insulin Aspart (Insulin aspart (B28-Asp human insulin analog)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Leu-enkephalin | Insulin Aspart |
|---|---|---|
| Category | Pain Management | Diabetes & Metabolic |
| Full Name | Tyr-Gly-Gly-Phe-Leu | Insulin aspart (B28-Asp human insulin analog) |
| Molecular Weight | 555.63 Da | 5825.8 Da |
| Half-Life | 1-5 minutes in plasma | About 1-3 hours |
| Amino Acids | 5 | 51 |
| Typical Dose | 0.1-5 ug per animal | 0.05-0.2 U/kg per meal |
| Route | Intrathecal / intracerebroventricular | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 1000 | 11000 |
| Research Status | Pre-clinical | Approved |
Leu-enkephalin Benefits
- ✓delta-opioid activity
- ✓endogenous analgesic model
- ✓receptor-selective pharmacology
- ✓nociception pathway research
Insulin Aspart Benefits
- ✓Fast post-meal glucose lowering
- ✓Predictable onset
- ✓Flexible mealtime administration
- ✓Compatible with pump therapy
Leu-enkephalin Dosing
Intrathecal 0.1-5 ug per animal|Intracerebroventricular 0.1-2 ug per animal|In vitro 1-100 nM
Insulin Aspart Dosing
Inject SC immediately before meals|Titrate using glucose monitoring and carbohydrate intake|Can be used in insulin pumps or basal-bolus regimens
Leu-enkephalin Side Effects
- ⚠sedation
- ⚠constipation-like opioid effects
- ⚠very short plasma stability
Insulin Aspart Side Effects
- ⚠Hypoglycemia
- ⚠Injection-site reactions
- ⚠Weight gain
Research Overview
Leu-enkephalin
Leu-enkephalin is a standard tool in opioid receptor and pain-transmission research because it helps distinguish delta- from mu-preferring signaling. Its research value is high, but its clinical utility is limited by rapid enzymatic breakdown and delivery challenges.
Insulin Aspart
Research consistently shows faster onset and earlier peak action than regular human insulin. It is commonly studied for meal-time glycemic control and pump-based insulin delivery.
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