Pre-Workout · computed from the label

Pre JYM

by JYM Supplement Science · $44.99 / 20 servings ($2.25/serving)
C
Formula
Underdosed
A+
Deal
Basically DIY price
✓ Worth it — a fair deal on a real formula

"13 ingredients, full doses, fully disclosed." Built by Jim Stoppani.

2 of 6 recognized ingredients hit their clinically studied dose.

Ingredients vs the studied dose

IngredientLabel doseStatus
L-Citrulline
6g pure L-citrulline — hits the clinical pump dose
6g✓ OK
Beta-Alanine
2g beta-alanine — below the 3.2g studied dose
2g⚠ LOW
Creatine Monohydrate
2g creatine HCl — below the 5g dose
2g⚠ LOW
Betaine Anhydrous
1.5g betaine — below the 2.5g dose
1.5g⚠ LOW
L-Tyrosine
600mg tyrosine — decent, but below the 1g studied dose
600mg⚠ LOW
Caffeine Anhydrous
300mg caffeine — strong
300mg✓ OK

Make it yourself — per serving

Ingredient (bulk)Cost/serving
L-Citrulline$0.32
Beta-Alanine$0.15
Creatine Monohydrate$0.23
Betaine Anhydrous$0.21
L-Tyrosine$0.05
Caffeine Anhydrous$0.08
Flavor + sweetener$0.20
Your DIY cost$1.24
JYM Supplement Science charges ($44.99 / 20 servings)$2.25

That's a 1.8× markup over building the same actives from bulk powders.

The verdict

Fully transparent and better than most — good citrulline and caffeine — but it splits its creatine and beta-alanine across a big ingredient list, so several land under their standalone studied doses. Solid mid-tier formula that you can still beat on price buying the actives loose.
Open the interactive card → Decode your own supplement

Head-to-head

Pre JYM vs Wrecked

More Pre-Workout grades

Pre-Kaged — BGorilla Mode — A+Total War — BBULK Pre-Workout — APulse — ABucked Up — C

Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.