Published 28 Oct 2026
Updated 4 November 2026
5 min read
- Most calories per serving: Optimum Nutrition Serious Mass (1,250 calories, 50 g protein)
- Smaller serving with creatine: BiotechUSA Hyper Mass 4 kg (254 calories, 20 g protein)
All 3 mass gainer packs, each matched to one need, are in the summary table below.
There is no single best mass gainer for everyone, so this guide does not rank them. Below is every mass gainer we sell, from two well-known brands, and each one is the best choice for one clear need. The two are very different: one gives a very large serving in a single drink, and the other a much smaller serving that you scale up yourself. Find your need, then buy that pack.
Every product is genuine and comes from a well-known brand. Peak X is an authorized distributor, and we do not stock cheap, low-quality or unverified mass gainers. Prices update automatically, and the facts in each box come from the product label.
How We Choose a Mass Gainer
How this guide works: the picks are in no particular order. We do not give them a rank, because the right pack depends on how many calories you need to add. Each pick carries a “Best for” label, and a product is only called best for the one thing that label says.
Serving sizes are very different between mass gainers, so a pack that looks cheap can hold only a few big servings. For every product we look at three label facts and show them in each box:
The price per gram of protein and the price per serving in each box are worked out live from the current price. For the 6 lb and 12 lb Serious Mass packs the number of servings is worked out from the pack weight and the 336 g serving, so it is marked “about”. Always read the full label on your own pack.
Mass Gainer or Whey Protein?
A mass gainer is a powder that adds a lot of calories, mostly from carbohydrate, with some protein. A whey protein adds mostly protein and few calories. Which one fits depends on what you are missing:
- You struggle to eat enough calories: a mass gainer is the simpler way to add them. Weight only goes up when you take in more calories than you burn.
- You already eat enough calories but want more protein: a whey protein is the better fit.
- You already take creatine: some gainers add it, so count it. See our Best Creatine in Nepal guide.
This is general information, not medical advice. If you have diabetes, a kidney condition or any other medical condition, or you are pregnant or take medication, speak to your doctor before using a mass gainer.
Our Picks: Best Mass Gainer for Every Need
Optimum Nutrition Serious Mass, 6 lb and 12 lb
Best For: The Most Calories Per Serving
Serious Mass is the one to look at if you struggle to eat enough. One serving is 336 g (2 scoops) and gives 1,250 calories and 50 g of protein when mixed with water, and 1,640 calories with low-fat milk. That is the biggest serving of the three packs here, so it is also the heaviest on the stomach and the most filling.
The label lists 252 g of carbohydrate and 4.5 g of fat per serving. The 12 lb pack holds about 16 servings and the 6 lb pack about 8. Both come in Chocolate. If you only want a lighter daily top-up, look at the BiotechUSA pick below instead.
Optimum Nutrition Serious Mass, 6 lb Specifications:
- Serving size: 2 scoops (336 g)
- Calories per serving: 1,250 with water, 1,640 with low-fat milk
- Protein per serving: 50 g
- Carbohydrate per serving: 252 g
- Fat per serving: 4.5 g
- Servings per pack: About 8 (2.72 kg ÷ 336 g)
- Flavour: Chocolate
- Price and cost per gram: Rs 9,990 (about Rs 25.0 per gram of protein)
- Price per serving: about Rs 1,249 per serving
Optimum Nutrition Serious Mass, 12 lb Specifications:
- Serving size: 2 scoops (336 g)
- Calories per serving: 1,250 with water, 1,640 with low-fat milk
- Protein per serving: 50 g
- Carbohydrate per serving: 252 g
- Fat per serving: 4.5 g
- Servings per pack: About 16
- Flavour: Chocolate
- Price and cost per gram: Rs 16,990 (about Rs 21.2 per gram of protein) Currently out of stock
- Price per serving: about Rs 1,062 per serving
BiotechUSA Hyper Mass, 4 kg
Best For: A Smaller Serving With Creatine Included
Hyper Mass has a much smaller serving: one scoop of about 65 g gives 254 calories, 20 g of protein and 38 g of carbohydrate (the BiotechUSA figures with water or skimmed milk). That makes it easier to start with, and you can add a second scoop if you need more calories. It also has the lowest price per gram of protein of the three packs, and 61 servings in the 4 kg pack.
The formula has whey protein, milk protein and calcium caseinate, 5.4 g of fibre, and 3.25 g of creatine monohydrate in every scoop, so count it if you already take creatine. It comes in Chocolate and Cookies and Cream.
BiotechUSA Hyper Mass, 4 kg Specifications:
- Serving size: 1 scoop (about 65 g)
- Calories per serving: 254
- Protein per serving: 20 g
- Carbohydrate per serving: 38 g (4.9 g sugars)
- Creatine monohydrate per serving: 3.25 g
- Servings per pack: About 61 (4 kg ÷ 65 g)
- Flavours: Chocolate, Cookies and Cream
- Price and cost per gram: Rs 14,450 (about Rs 11.8 per gram of protein)
- Price per serving: about Rs 237 per serving
Summary Table
Each row is best for one need. They are not ranked.
| Best for | Product | Calories per serving | Protein per serving | Price | Price per serving |
|---|---|---|---|---|---|
| Most calories per serving | ON Serious Mass 6 lb | 1,250 | 50 g | Rs 9,990 (about Rs 25.0 per gram of protein) | about Rs 1,249 per serving |
| Most calories per serving, bigger pack | ON Serious Mass 12 lb | 1,250 | 50 g | Rs 16,990 (about Rs 21.2 per gram of protein) Currently out of stock | about Rs 1,062 per serving |
| Smaller serving with creatine | BiotechUSA Hyper Mass 4 kg | 254 | 20 g | Rs 14,450 (about Rs 11.8 per gram of protein) | about Rs 237 per serving |
Browse every mass gainer in Nepal on our shop.
You Might Also Like
- Best Whey Protein in Nepal [Updated 2026]
- Best Creatine in Nepal [Updated 2026]
- Genuine vs Fake Supplements in Nepal
- All Peak X buying guides
Questions and Answers
What is the best mass gainer in Nepal?
There is no single best mass gainer for everyone, so this guide matches each product to a need. Optimum Nutrition Serious Mass is our pick for the most calories per serving, and BiotechUSA Hyper Mass for a smaller serving with creatine included.
How do I compare mass gainer prices?
Compare the price per gram of protein and the calories you get, not the price of the pack, because the serving sizes are very different. Multiply the protein per serving by the number of servings, then divide the price by that number. The table above does this for every pack.
How many servings should I take a day?
Follow the directions on your own pack. A large serving such as Serious Mass can be a lot to drink at once, so some people start with a smaller portion. If you are not sure how much you need, speak to a doctor or a qualified nutritionist.
Should I mix it with water or milk?
Both work. Optimum Nutrition lists 1,250 calories for a serving of Serious Mass mixed with water and 1,640 calories with low-fat milk, so milk adds calories.
Is a mass gainer better than whey protein?
They do different jobs. A mass gainer adds many calories, mostly from carbohydrate, and a whey protein adds mostly protein. See our Best Whey Protein in Nepal guide to compare.
Is the mass gainer in Nepal genuine?
Peak X is an authorized distributor for the brands we sell, and we only stock genuine products. Whichever shop you buy from, check the seal, batch number and expiry date when the pack arrives. See our guide to genuine vs fake supplements in Nepal.
What if a mass gainer is out of stock?
Packs that are out of stock stay on the list, and their button says Ask on WhatsApp. Message us and we will tell you when it is back, or suggest the closest alternative.
Do you deliver mass gainers across Nepal?
Yes. Peak X delivers across Nepal, and you can order on our website or WhatsApp.
This information is general and not medical advice. If you have a medical condition, are pregnant or take medication, speak to your doctor before using supplements.
Owner of Peak X Supplement in Banepa, selling sports nutrition and delivering across Nepal. Every figure in our guides comes straight from the product label.
See every pack we stock, with today’s price.
- DFTQC number on every product
- Full VAT bill with every order
