---
title: "Low Calorie Protein Powder — £622K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/low-calorie-protein-powder"
last_updated: "2026-07-31T17:39:03.067Z"
locale: en
meta:
description: "Niche score 52/100 · £622K/yr market · 786K searches/yr · £28.08 avg price. Soft demand (-12.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · £622K/yr market · 786K searches/yr · £28.08 avg price. Soft demand (-12.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Low Calorie Protein Powder — £622K/yr Amazon UK Niche (2026) - Flapen"
---
# **low calorie protein powder**
**Worth a look**
Shows low returns (0.1%), but soft demand (-12.8% this quarter) keeps it on the watch list.
Market size 65Growth 19Conversion 35Competition 44Returns 99Price range 83Avg price 95Brand share 19Review moat 28Quality gap 76
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£28.08**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£10.08–£44.25**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****£622K**
£622K/yr · 786K searches
**Competition**
**Okay****59%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****2.8%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****3,739.77**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-12.8%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, low calorie protein powder is a £622K/yr Amazon United Kingdom market (786K searches/yr). The top 5 brands hold 92% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **low calorie protein powder market data**
- **Units sold / yr**
- **20K–25K**
- avg 750–1,000/product
- **Revenue / yr**
- **£562K–£702K**
- units × avg price
- **Conversion rate**
- **2.8%**
- **Avg BSR**
- **#49**
- **Page quality**
- **0%**
- **Prime**
- **91%**
- **Sponsored**
- **77%**
- **Out of stock**
- **3.3%**
- **Avg brand age**
- **53 months**
- **Avg seller age**
- **158 days**
## **Competition & brand share**
The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▼falling
**Sellers**
**51**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**59%**
Top 20: 97%
**Open market**
**5%**
- Optimum Nutrition67% - Reflex Nutrition9% - The Bulk Protein Company7% - USN5% - Mutant5% - OZUNA NUTRITION2% - Open — no brand owns it (3 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -12.8% search growth over the last 90 days.
18K13KSpike '24Holiday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/low-calorie-protein-powder/trend)
## **Top low calorie protein powder search terms**
- **mass gainer**273K/yr-12.0%2.0% conv. - **serious mass**85K/yr-6.6%4.9% conv. - **weight gainer**76K/yr-9.8%1.5% conv. - **mass gainer protein powder**60K/yr-24.6%1.8% conv. - **weight gainer for skinny people**53K/yr-13.3%1.0% conv. - **weight gain**41K/yr-12.0%0.9% conv. - **optimum nutrition serious mass**24K/yr+4.8%4.4% conv. - **mass**26K/yr-22.6%0.9% conv. - **weight gain protein powder**23K/yr-7.2%1.2% conv. - **mass gainer optimum nutrition**12K/yr+18.4%4.1% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/low-calorie-protein-powder/search-terms)
## **Top low calorie protein powder 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%10%£62K20%£124K30%£187K40%£249K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 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**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Chocolate 8 Servings 2.73 kg Packaging May Vary**Optimum Nutrition**£25.73**4.4★18,494 rev](https://www.amazon.co.uk/dp/B0015R36SK) [3**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Chocolate 16 Servings 5.45 kg**Optimum Nutrition**£44.25**4.5★15,456 rev](https://www.amazon.co.uk/dp/B000GIPJ0M) [4**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) [5**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Banana 16 Servings 5.45 kg Packaging May Vary**Optimum Nutrition**£42.75**4.5★3,231 rev](https://www.amazon.co.uk/dp/B002DYIZPS)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine Monohydrate and Glutamine Vanilla 4 Servings 1.34kg Packaging May Vary**Optimum Nutrition**£19.33**12,618 rev1y ago](https://www.amazon.co.uk/dp/B0FFTB3SGJ) [**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Chocolate 4 Servings 1.34 kg Packaging May Vary**Optimum Nutrition**£18.77**32 rev1y ago](https://www.amazon.co.uk/dp/B0FFTB889F) [**Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder High Calorie Weight Gainer Lean Mass (2.4kg - 16 Servings) (Chocolate)**Applied Nutrition**£24.55**67 rev2y ago](https://www.amazon.co.uk/dp/B0D7HYNLRT) [**MUTANT Mass Extreme 2500 | High-Calorie Weight Gainer | Complex Carbs BCAAs & Glutamine | Hardcore Muscle Mass Shake | 2720g | Vanilla Ice Cream**Mutant**£27.41**1,425 rev4y ago](https://www.amazon.co.uk/dp/B09F5R1BPJ) [**USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer Strawberry Flavour - 2kg 54g Protein Powder 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth Post Workout Recovery Drink Mix**USN**£24.77**568 rev5y ago](https://www.amazon.co.uk/dp/B0BHBXNYT7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Cookies and Cream 16 Servings 5.45 kg Packaging May Vary**Optimum Nutrition**£43.51**4.4★**▲ 117%**](https://www.amazon.co.uk/dp/B072JSYMRV) [**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★**▲ 115%**](https://www.amazon.co.uk/dp/B01AEWOIBA) [**USN Hyperbolic All in One Mass (6000g) Dutch Chocolate - Weight Gainer - with Creatine**USN**£38.28**4.1★**▲ 94%**](https://www.amazon.co.uk/dp/B07K116H9C) [**Bulk Complete Mass Gainer Chocolate 81g Carbohydrates**BULK POWDERS**£22.97**4.2★**▲ 90%**](https://www.amazon.co.uk/dp/B00H3C3QM2) [**USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer Strawberry Flavour - 2kg 54g Protein Powder 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth Post Workout Recovery Drink Mix**USN**£24.77**4.5★**▲ 83%**](https://www.amazon.co.uk/dp/B0BHBXNYT7)
**~~View all trending →~~**
## **What buyers say about low calorie protein powder**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**18%
*“Taste great mixes well”*
**Quality-Overall**13%
*“its had so many good reviews”*
**Nutritional Content**10%
*“Really good protein powder”*
**Value For Money**10%
*“worth every penny”*
**Flavor**7%
*“the flavour is really nice”*
**Weight Gain**6%
*“I think this will help you gain weight as long as you have this along with your meals”*
**Weight Loss**5%
*“Very helpful with getting weight back on”*
**Size-Overall**4%
*“Great size”*
**Blend/Ratio**3%
*“Perfect blend of everything”*
**Solubility**2%
*“it does mix quite well”*
### **What buyers complain about **
**Taste-Overall**20%
*“Does not taste good”*
**Nutritional Content**11%
*“It's not protein”*
**Value For Money**6%
*“Cheap for a reason”*
**Flavor**5%
*“The taste of the dutch chocolate flavour shakes are extremely unpleasant”*
**Size-Overall**4%
*“HALF THE SIZE BE CAREFUL OF DETAILS”*
**Weight Loss**4%
*“Didnt put weight on even though I struggle with eating”*
**Advertised Vs Actual Product**3%
*“Please tell me it isnt true”*
**Sweetness**3%
*“the only bad is that this gainer is extra sweet”*
**Mixing/Blending**3%
*“doesn't really mix well”*
**Texture/Consistency-Overall**3%
*“really bad texture”*
## **Common questions**
- **Is low calorie protein powder profitable to sell on Amazon United Kingdom?**
- The niche generates £622K/yr across 22 tracked products. 90-day search growth is -12.8%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the low calorie protein powder niche?**
- 9 brands and 51 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in low calorie protein powder?**
- Top complaints mined from reviews: Taste-Overall, Nutritional Content, Value For Money. The return rate is 0.1%.
- **When does demand for low calorie protein powder peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the low calorie protein powder niche?**
- Listings span £10.08–£44.25; the average listing price is £28.08 (sweet spot $15–$100). The average incumbent carries 3,740 reviews — the moat a new listing must climb.
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