Serious Mass

Optimum Nutrition Serious Mass is a meal replacement that SuppSaver compares across 1 Australian retailer. The best price we're currently tracking is $159.95 at Mr Supplement, which works out to $19.53/100g protein — the true-cost figure we rank every meal replacement on. That comes to roughly $10.00 per serve. At 15% protein by weight, the cost per 100g of actual protein — not just powder — is what decides whether it's good value.

Retailer prices shift week to week, so we re-check every listing daily and rank by true cost per 100g of protein rather than sticker price. That lets you see whether Serious Mass is genuinely the cheapest meal replacement on the market or simply discounted right now. It's listed in 5.5kg and 2.7kg. Shoppers rate it 4.9 out of 5 from 1 reviews. Use the price history, the per-store breakdown and the alternatives below to confirm you're getting the best deal before you buy.