Head-to-Head · 2026
Optimum Nutrition Serious Mass vs Bulk Aftermath
We score both post-workout products against the same evidence-based clinical reference, so you can see exactly how their active doses, true cost per serving and Effectiveness Match scores stack up — never brand reputation or marketing.
Verdict
Optimum Nutrition Serious Mass wins on Effectiveness Match with 94/100.
Best value per serving: Bulk Aftermath at £1.00/serving (score 73).
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How we score
Each product earns an Effectiveness Match score (0–100) measuring how closely its active ingredient doses match the evidence-based clinical reference for its category. Proprietary blends and amino-spiked formulas are penalised because they hide the real dose. We are independent — scores are never influenced by brands or affiliate deals.
Informational only — not medical advice. Buy links are affiliate links; we may earn a commission at no extra cost to you. This never affects scoring.