Optimum Nutrition Serious Mass

Name: Optimum Nutrition Serious Mass
Brand: Optimum Nutrition
SKU: on-serious-mass
Price: 1910.00 THB
Availability: InStock

Mass gainer

Mass gainer is high in calories, not pure whey. Check your daily calories before choosing.

50 gprotein / scoop8scoops / tub1250kcal / scoop

Not tested See verification details Bangkok: get it todayOrder by 14:00 · upcountry 1–3 days

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What does it taste like?

Taste score Vanilla: [Add real data]

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Tags like “not too sweet / no milky smell / mixes easily / no bloating” only appear when buyer data supports them. Everyone is different.

Try the flavor first, see our flavor swap policy

Made from cow's milk not suitable if you're allergic to cow's milk protein

฿1,910Vanilla · one-time

This product in short

Optimum Nutrition Serious Mass is a mass gainer in a 6 lb pack: 50 g of protein from 1,250 kcal per scoop, 8 scoops per pack, so one serving a day lasts 8 days.

At the average Thai price of ฿1,910 it works out to ฿4.78 per gram, about 22% above the average for mass gainers for weight gain in our store (6 products, average ฿3.90). #4 in its group.

3 flavours: Vanilla · Chocolate · Banana.

Video reviews

2 videos

Optimum Nutrition Serious Mass (My Complete No BS Review)

Weight Gain Network · YouTube

Optimum Nutrition Serious Mass - Unboxing & Review (The New Version)

Show me · YouTube

Videos are from reviewers' YouTube channels. We didn't make them.

Product details

Brand	Optimum Nutrition
Protein type	Mass gainer
Protein per scoop	50 g
Calories per scoop	1250 kcal
Scoops	8
Net weight	6 lb
Price per gram (label)*	฿4.78 (฿1,910 ÷ (50 × 8))

Good for

Gain weight

Temporary data from online stores · check the real label before selling · updated 2026-10-18

What you can verify

Not tested

This lot's details are waiting for real documents

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Protein on label*50 g/scoop

Protein measuredAwaiting lab

*Sample product figures · result, method, lab and date: [Add real data]

Baht per gram of verified proteinCan't be worked out yetOnce there's a lab result for this flavor, serving size and lot, it replaces the label figure.

Fake? 2× refund Draft policy · see terms