IR8 Pre Workout
vs Smash AMF Pre Workout (OG)
Ingredient & Score Comparison
Last updated: Feb 2026
PwrRanks Verdict
Score Comparison
Objective scores based on ingredient dosing — 0 to 1 scale
Smash AMF Pre Workout (OG)'s formula has 500mg L-Tyrosine and 500mg Acetyl L-Carnitine HCl, which contribute to a higher focus score.
Smash AMF Pre Workout (OG) delivers more performance per dollar than IR8 Pre Workout — based on how both products compare to the broader pre-workout market.
Ingredient Comparison
IR8 vs Smash AMF Pre Workout (OG) — dosing per serving
| Ingredient | Objective | IR8 | Smash AMF Pre Workout (OG) |
|---|---|---|---|
| Caffeine Yield | Energy | 306mg | 350mg |
| DMAA | Energy | 80mg | — |
| DMHA | Energy | 50mg | — |
| Yohimbine HCl | Energy | 2mg | 3mg |
| L-Citrulline | Pump | 2.3g | 4g |
| L-Citrulline Malate | Pump | 2.3g | — |
| Agmatine | Pump | 500mg | — |
| Taurine | Pump | — | 500mg |
| L-Tyrosine | Focus | — | 500mg |
| Acetyl L-Carnitine HCl | Focus | — | 500mg |
| L-Theanine | Focus | — | 20mg |
| Beta-Alanine | - | 3g | 1.5g |
| Creatine HCl | - | 1g | 1g |
| Epicatechin | - | 100mg | — |
| Synephrine HCl | - | 20mg | 50mg |
| Green Tea 98% | - | — | 50mg |
| Higenamine | - | 45mg | — |
| Hordenine | - | 20mg | — |
| Grape Seed Extract | - | — | 20mg |
| Black Pepper Extract | - | — | 10mg |
| N-Methyltyramine HCL | - | — | 5mg |
| Naringenin | - | — | 5mg |
Who Should Buy Each
Matching products to training goals and stim tolerance
Choose IR8 If…
- ✓You want a powerful pre-workout and are comfortable using it 2–3 times per week max
- ✓You want maximum intensity and train in the morning
Choose Smash AMF Pre Workout (OG) If…
- ✓You want a high energy formula without exotic stimulants
- ✓You want some pump support without it dominating the formula
Frequently Asked Questions
Common questions about these two pre-workouts
Smash AMF Pre Workout (OG) has 350mg total caffeine per serving compared to 306mg in IR8 Pre Workout.
More Comparisons
How PwrRanks Scores Pre-Workouts
Our methodology
PwrRanks scores every pre-workout by analyzing its ingredient label algorithmically. We generate four objective scores — Energy, Pump, Focus, and Value — that reflect what's in the tub, not how the product is marketed. Value scores are calculated using live pricing data to reflect real cost-per-serving at time of comparison.