---
title: "Weight Gainer for Skinny People — £57K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/weight-gainer-for-skinny-people"
last_updated: "2026-07-31T12:33:09.861Z"
locale: en
meta:
description: "Niche score 51/100 · £57K/yr market · 97K searches/yr · £26.27 avg price. A small market ($57K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · £57K/yr market · 97K searches/yr · £26.27 avg price. A small market ($57K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Weight Gainer for Skinny People — £57K/yr Amazon UK Niche (2026) - Flapen"
---
# **weight gainer for skinny people**
**Worth a look**
Shows low returns (0.1%), but a small market ($57K/yr) keeps it on the watch list.
Market size 14Growth 17Conversion 28Competition 72Returns 100Price range 82Avg price 95Brand share 39Review moat 48Quality gap 76
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£26.27**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£8.18–£49.35**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****42%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****1,679.71**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Okay****2.2%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-15.5%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£57K**
£57K/yr · 97K searches
According to Flapen's Amazon United Kingdom niche tracking, weight gainer for skinny people is a £57K/yr Amazon United Kingdom market (97K searches/yr). The top 5 brands hold 81% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **weight gainer for skinny people market data**
- **Units sold / yr**
- **2K–3K**
- avg 0–100/product
- **Revenue / yr**
- **£53K–£66K**
- units × avg price
- **Conversion rate**
- **2.2%**
- **Avg BSR**
- **#76**
- **Page quality**
- **0%**
- **Prime**
- **80%**
- **Sponsored**
- **69%**
- **Out of stock**
- **3.6%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**95**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**42%**
Top 20: 78%
**Open market**
**15%**
- Reflex Nutrition45% - Optimum Nutrition17% - OZUNA NUTRITION9% - The Bulk Protein Company6% - NutriVigor5% - Kinetica4% - Open — no brand owns it (10 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -15.5% search growth over the last 90 days.
3K2KSpike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/weight-gainer-for-skinny-people/trend)
## **Top weight gainer for skinny people search terms**
- **weight gainer for skinny people**53K/yr-13.3%1.4% conv. - **reflex nutrition**15K/yr+19.2%2.1% conv. - **reflex protein powder**9K/yr-20.8%3.5% conv. - **reflex**6K/yr-4.9%1.1% conv. - **high calorie**5K/yr-33.5%0.1% conv. - **reflex protein**2K/yr-13.9%3.4% conv. - **high calorie weight gain**6K/yr-79.7%0.4% conv. - **reflex whey protein**993/yr+37.8%2.9% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/weight-gainer-for-skinny-people/search-terms)
## **Top weight gainer for skinny people products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%3%£2K6%£3K9%£5K12%£7K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Vanilla 8 Servings 2.73 kg Packaging May Vary**Optimum Nutrition**£28.01**4.5★12,618 rev](https://www.amazon.co.uk/dp/B0015R6ZPQ) [2**Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving 60g Protein Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection 2 kg)**Reflex Nutrition**£20.32**4.1★656 rev](https://www.amazon.co.uk/dp/B01E483MDK) [3**ANABOLIC Weight GAIN Tablets - Quick Muscle Mass Pills Growth Potent Capsules**OZUNA NUTRITION**£10.41**3.6★800 rev](https://www.amazon.co.uk/dp/B07PWCCNF9) [4**Reflex Nutrition 100% Whey Protein - 80% Pure Whey Protein - EAA Amino Acids - No Added Sugar - Whey Protein Powder for Pre Workout & Post Workout Recovery (Vanilla 2kg 66 Servings)**Reflex Nutrition**£45.35**4.5★261 rev](https://www.amazon.co.uk/dp/B00VXRAG9O) [5**Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving 60g Protein Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream 2 kg)**Reflex Nutrition**£20.13**4.1★555 rev](https://www.amazon.co.uk/dp/B01E483ON8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Reflex Nutrition Instant Mass Heavyweight Protein Shake Mix Mass Gainer Over 1000 Kcal per Serving 60 g Protein Creatine High Calorie Post Workout or Before Bed Vanila 2 kg**Reflex Nutrition**£20.08**218 rev1y ago](https://www.amazon.co.uk/dp/B0F2G5GB57) [**Reflex Nutrition Instant Mass Heavyweight Protein Shake Mix Mass Gainer Over 1000 Kcal per Serving 60 g Protein Creatine High Calorie Post Workout or Before Bed Salted Caramel 2 kg**Reflex Nutrition**£20.35**62 rev1y ago](https://www.amazon.co.uk/dp/B0F2G76WMT) [**Pure Creatine Monohydrate Powder - 315g (90 Servings) - Easy Dissolve Creatine Powder Unflavoured & Micronised (Not Creatine Gummies or Creatine Tablets) Vegan Creatine for Women and Men**Nutrition Geeks**£8.18**5,215 rev1y ago](https://www.amazon.co.uk/dp/B0DQQDZGCW) [**Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption Low Lactose Low Fat Low Sugar Protein Shake - Muscle Gain (Chocolate 1.8kg 60 Servings)**Reflex Nutrition**£48.48**39 rev2y ago](https://www.amazon.co.uk/dp/B0D7Q8932F) [**Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption Low Lactose Low Fat Low Sugar Protein Shake - Muscle Gain (Vanilla 1.8kg 60 Servings)**Reflex Nutrition**£49.35**21 rev2y ago](https://www.amazon.co.uk/dp/B0D7Q72T5R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Reflex Nutrition Instant Mass Heavyweight Protein Shake Mix Mass Gainer Over 1000 Kcal per Serving 60 g Protein Creatine High Calorie Post Workout or Before Bed Salted Caramel 2 kg**Reflex Nutrition**£20.35**3.6★**▲ 294%**](https://www.amazon.co.uk/dp/B0F2G76WMT) [**Reflex Nutrition Instant Mass Heavyweight Protein Shake Mix Mass Gainer Over 1000 Kcal per Serving 60 g Protein Creatine High Calorie Post Workout or Before Bed Vanila 2 kg**Reflex Nutrition**£20.08**4.1★**▲ 178%**](https://www.amazon.co.uk/dp/B0F2G5GB57) [**The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Vanilla 5kg)**The Bulk Protein Company**£27.99**4.0★**▲ 121%**](https://www.amazon.co.uk/dp/B01AEWOIBA) [**Reflex Nutrition Plant Based Protein - 21g Vegan Protein Powder (Pea Protein Brown Rice Protein & Pumpkin Seeds) - Digestive Enzymes & Vitamin B12 - Natural Flavours (Vanilla Bean 20 Servings)**Reflex Nutrition**£15.65**4.3★**▲ 104%**](https://www.amazon.co.uk/dp/B081Q15M4P) [**Reflex Nutrition One Stop Xtreme (4.35kg) Strawberries & Cream - Proteins - Protein Blend**Reflex Nutrition**£41.35**4.4★**▲ 79%**](https://www.amazon.co.uk/dp/B004LBPJA0)
**~~View all trending →~~**
## **What buyers say about weight gainer for skinny people**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Good product as described”*
**Taste-Overall**15%
*“has no unpleasant taste or odour”*
**Value For Money**10%
*“Good price”*
**Solubility**6%
*“Easy to mix”*
**Nutritional Content**5%
*“Great protein shake”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Flavor**4%
*“The flavour was subtle”*
**Ease Of Use**3%
*“Easy to use”*
**Blend/Ratio**3%
*“Good taste and mixes well”*
**Energy Level**2%
*“consistent energy on you”*
### **What buyers complain about **
**Taste-Overall**16%
*“very chalky powdery taste”*
**Nutritional Content**6%
*“It's not protein”*
**Value For Money**5%
*“Cheap for a reason”*
**Solubility**5%
*“Does not dissolve”*
**Flavor**4%
*“The flavour is much less intense than it smells like it would be”*
**Side Effects**4%
*“Performance-wise, the effects were subtle”*
**Weight Loss**3%
*“Didnt put weight on even though I struggle with eating”*
**Texture/Consistency-Overall**3%
*“making a chalky texture”*
**Mixing/Blending**2%
*“Poor mix ability”*
**Quality-Overall**2%
*“Not the best”*
### **Top return reasons **
**Contamination**17%
**Advertised Vs Actual Product**17%
**Size-Overall**17%
**Taste-Overall**17%
**Leak-Proof**17%
**Flavor**17%
## **Common questions**
- **Is weight gainer for skinny people profitable to sell on Amazon United Kingdom?**
- The niche generates £57K/yr across 45 tracked products. 90-day search growth is -15.5%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the weight gainer for skinny people niche?**
- 16 brands and 95 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in weight gainer for skinny people?**
- Top complaints mined from reviews: Taste-Overall, Nutritional Content, Value For Money. The return rate is 0.1%.
- **When does demand for weight gainer for skinny people peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the weight gainer for skinny people niche?**
- Listings span £8.18–£49.35; the average listing price is £26.27 (sweet spot $15–$100). The average incumbent carries 1,680 reviews — the moat a new listing must climb.
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