Who Is This Article For?
You want to gain mass and are considering buying a mass gainer. You look at the ingredients and notice that the first item is often maltodextrin -- an unfamiliar-sounding powder that makes up 50-70% of the product. Is it useful, or are you paying a premium price for a cheap carbohydrate? After reading, you will know when gainer maltodextrin is justified and when it is smarter to make your own blend.
TL;DR
- Most mass gainer calories come from maltodextrin -- a cheap fast carbohydrate
- Maltodextrin in a gainer makes sense when you need high calories in a compact form and are short on time
- In many cases you can get the same result cheaper: whey protein + oats + banana
- The glycaemic index is high (~95), making it unsuitable for insulin-sensitive individuals
- A quality gainer includes maltodextrin ALONGSIDE oat flour, sweet potato powder, or other slow carbs
- For hardgainers eating over 4,000 kcal daily, a maltodextrin-based gainer is a practical solution
Why Is Maltodextrin the Main Ingredient in Gainers?
The answer is simple: maltodextrin is cheap, tasteless, and easy to mix. It costs the manufacturer EUR 1-3 per kilogram, but the same kilogram sells for EUR 15-30 inside a gainer (Hofman et al., 2016).
That does not mean maltodextrin is bad. It has properties that make it practical in a gainer:
- High caloric density -- 4 kcal per gram, same as sugar, but without the sweet taste
- Low osmolality -- does not cause stomach distress even at high amounts (Jeukendrup, 2010)
- Fast digestion -- does not fill you up, so you can eat again within two hours
- Insulin stimulation -- raises insulin, which helps amino acids enter muscle cells (Ivy et al., 2002)
The Problem:
That same fast digestion means an 800-calorie gainer shake leaves you hungry again within an hour. You also miss out on vitamins, minerals, and fibre you would get from real food.
Gainer Maltodextrin: When Is It Justified?
| Scenario | Justified? | Why |
|---|---|---|
| Hardgainer who cannot get 3,500+ kcal from regular food | Yes | Compact calorie source that does not create fullness |
| Quick post-workout recovery | Yes | Fast glycogen replenishment combined with protein (Ivy et al., 2002) |
| Healthy long-term weight gain | Conditionally | Better combined with slow carbs |
| Weight loss | No | Empty calories, high GI |
| Sedentary individual | No | Insulin spike without training is not beneficial |
DIY Gainer vs Store-Bought: Cost Analysis
Let us look at what you actually get.
Store-bought gainer (typical 3 kg bag, ~EUR 35-45):
- ~12 servings
- Per serving: ~50 g protein, 100 g carbs (of which ~80% maltodextrin)
- Cost per serving: ~EUR 3-3.75
DIY version:
- 40 g whey protein (EUR 0.80)
- 80 g oats (EUR 0.08)
- 1 banana (EUR 0.15)
- 300 ml whole milk (EUR 0.25)
- Total: ~EUR 1.30 per serving
Savings: ~EUR 2 per serving, or ~EUR 24 per month (one shake a day). Plus you get fibre, potassium, and B vitamins that maltodextrin does not contain.
When Is a Store-Bought Gainer Still Better?
When you travel frequently, do not have a blender handy, or simply cannot get 3,500+ kcal from food. The convenience factor is real.
Common Mistakes With Gainers
1. Double serving -- some gainer servings are already 1,200 kcal. A double dose = 2,400 kcal in one shake. That does not go to muscle; it goes to fat.
2. Gainer replaces meals -- a gainer should be in addition to food, not instead of it. You still need fibre, vitamins, and minerals.
3. Gainer before bed -- the high-GI insulin spike before sleep disrupts sleep quality. Better to use casein + nut butter.
4. Wrong gainer -- some cheap gainers are 90% maltodextrin and 10% protein. Check the label: the protein-to-carb ratio should be at least 1:3.
5. Starting too early -- beginners do not need a gainer. Optimise your regular diet first.
Maltodextrin vs Alternative Carbs in Gainers
| Ingredient | GI | Fibre | Price (EUR/kg) | Suitable for gainers? |
|---|---|---|---|---|
| Maltodextrin | 85-105 | 0 g | 5-10 | Yes, but not as sole carb |
| Oat flour | 55 | 10 g/100g | 1-3 | Excellent, but thickens drink |
| Sweet potato powder | 50-60 | 3 g/100g | 15-25 | Good, but expensive |
| Dextrose | 100 | 0 g | 3-7 | Post-workout only |
| Waxy maize starch | 55-65 | 0 g | 10-20 | Good, but pricey |
The best approach is a combination: maltodextrin for quick energy + oat flour for sustained fullness and fibre.
Frequently Asked Questions
Will a gainer make me fat?
Yes, if you do not train enough. A gainer is designed to create a caloric surplus, which should go to muscle mass. But without resistance training, that surplus becomes fat. Calculate your daily caloric expenditure before adding a gainer (Kreider et al., 2010).
Can I replace the maltodextrin in a gainer?
Yes. The simplest option: blend whey protein with finely ground oats. You get a slower-absorbing carbohydrate that keeps blood sugar more stable and provides fibre.
Does gainer maltodextrin cause acne?
There is no direct evidence, but high-GI foods have been associated with worsening acne through insulin elevation (Smith et al., 2007). If acne is a concern, try switching to an oat-flour-based gainer.
How many gainer servings per day should I have?
One to two servings daily is typical. But it depends on your calorie needs. First calculate how many calories you get from regular food, then use the gainer only to fill the gap.
Is a maltodextrin gainer suitable for the lactose-intolerant?
Maltodextrin itself is lactose-free. However, most gainers also contain whey protein, which contains lactose. Look for a variant with whey isolate (WPI) or plant protein.
Local Context (Estonia)
MaxFit's range includes both premium gainers where maltodextrin is combined with oat flour and other slow carbs, and simpler options. In Estonia's climate, where the temptation to reduce activity in winter is real, be especially careful with gainer use on rest days -- a caloric surplus without training means fat gain.
A good starting point is MaxFit's mass gainer selection. Always compare the protein-to-carb ratio and the ingredients list.
References
1. Hofman DL, van Buul VJ, Brouns FJPH. (2016). Nutrition, health, and regulatory aspects of digestible maltodextrins. Critical Reviews in Food Science and Nutrition, 56(12), 2091-2100.
2. Jeukendrup AE. (2010). Carbohydrate and exercise performance: the role of multiple transportable carbohydrates. Current Opinion in Clinical Nutrition and Metabolic Care, 13(4), 452-457.
3. Ivy JL, Goforth HW, Damon BM, McCauley TR, Parsons EC, Price TB. (2002). Early postexercise muscle glycogen recovery is enhanced with a carbohydrate-protein supplement. Journal of Applied Physiology, 93(4), 1337-1344.
4. Kreider RB, Earnest CP, Lundberg J, Rasmussen C, Greenwood M, Cowan P, Almada AL. (2010). Effects of ingesting protein with various forms of carbohydrate following resistance-exercise on substrate availability and markers of anabolism, catabolism, and immunity. Journal of the International Society of Sports Nutrition, 4, 18.
5. Smith RN, Mann NJ, Braue A, Makelainen H, Varigos GA. (2007). A low-glycemic-load diet improves symptoms in acne vulgaris patients: a randomized controlled trial. American Journal of Clinical Nutrition, 86(1), 107-115.
Summary
Maltodextrin in a gainer is not a scam, but it is not magic either. It is a cheap, fast calorie source with a legitimate place in sports nutrition -- especially for hardgainers and endurance athletes. But many trainees would get the same result cheaper and healthier with a DIY blend. Check the label, calculate your calorie needs, and decide whether the convenience is worth the extra cost.
See also:
