Source comparison
Syringe Type Comparison: U-100 vs U-50 vs Tuberculin
U-100 Insulin (1ml) 1ml / 100 IU 0.01ml per tick Standard peptide dosing 0.1–1ml Excellent for doses 500mcg–2mg ±0.01ml (10mcg at 1mg/ml concentration) U-50 Insulin (0.5ml) 0.5ml / 50 IU Low-volume precision dosing <0.5ml Ideal for microdosing protocols <1mg ±
This comparison does not assign a generated winner or score.
- U-100 Insulin (1ml)
- 1ml / 100 IU
- 0.01ml per tick
- Standard peptide dosing 0.1–1ml
- Excellent for doses 500mcg–2mg
- ±0.01ml (10mcg at 1mg/ml concentration)
- U-50 Insulin (0.5ml)
- 0.5ml / 50 IU
- Low-volume precision dosing <0.5ml
- Ideal for microdosing protocols <1mg
- ±0.01ml (same precision, half the capacity)
- Tuberculin (1ml)
- 1ml
- 0.01ml per tick (no IU markings)
- Laboratory-grade volume measurement
- Excellent. Avoids IU confusion entirely
- ±0.01ml (clearest ml-only scale)
- U-40 Insulin (1ml)
- 1ml / 40 IU
- 0.025ml per tick
- Veterinary insulin (non-standard for human peptides)
- Poor. Tick increments too coarse for PT-141
- ±0.025ml (2.5× less precise than U-100)
- The U-100 insulin syringe is the standard for subcutaneous peptide research because it balances precision (0.01ml ticks) with sufficient volume capacity (up to 1ml total). Tuberculin syringes offer identical precision without IU labeling, which eliminates the mental conversion step entirely. But they're less widely available and cost 2–3× more per unit.
- Avoid U-40 syringes (common in veterinary settings). Their 0.025ml tick increments create a 2.5× margin of error compared to U-100 syringes, which compounds across titration protocols.