---
title: "Protein Powder 5kg — £321K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/protein-powder-5kg"
last_updated: "2026-07-31T11:02:27.996Z"
locale: en
meta:
description: "Niche score 54/100 · £321K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £321K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Protein Powder 5kg — £321K/yr Amazon UK Niche (2026) - Flapen"
---
# **protein powder 5kg**
**Worth a look**
Shows low returns (0.1%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 52Growth 21Conversion 55Competition 41Returns 100Price range 87Avg price 95Brand share 0Review moat 58Quality gap 89
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£37.21**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Price range**
**Great****£26.41–£107.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****1,171.28**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****4.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£321K**
£321K/yr · 188K searches
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-8.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, protein powder 5kg is a £321K/yr Amazon United Kingdom market (188K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **protein powder 5kg market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **£223K–£298K**
- units × avg price
- **Conversion rate**
- **4.6%**
- **Avg BSR**
- **#27**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **67%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **80 months**
- **Avg seller age**
- **158 days**
## **Competition & brand share**
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**4 **▼falling
**Sellers**
**28**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**60%**
Top 20: 100%
**Open market**
**0%**
- The Bulk Protein Company89% - Optimum Nutrition5% - Bulk4% - Sports Fuel2% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -8.0% search growth over the last 90 days.
5K4KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/protein-powder-5kg/trend)
## **Top protein powder 5kg search terms**
- **serious protein**37K/yr+6.1%5.2% conv. - **whey protein powder 5kg**21K/yr+10.2%0.7% conv. - **protein powder 5kg**29K/yr-12.6%1.1% conv. - **serious gainz**25K/yr-16.9%4.5% conv. - **5kg protein powder**14K/yr-17.6%1.2% conv. - **protein powder 4kg**7K/yr-0.4%2.7% conv. - **whey protein 5kg**8K/yr-9.7%0.8% conv. - **serious gainz protein powder**7K/yr+6.5%5.4% conv. - **5kg whey protein**10K/yr-46.1%0.6% conv. - **4kg protein powder**5K/yr-4.2%2.5% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/protein-powder-5kg/search-terms)
## **Top protein powder 5kg 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%£32K20%£64K30%£96K40%£128K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)**The Bulk Protein Company**£30.55**3.9★1,280 rev](https://www.amazon.co.uk/dp/B01CCSJRP6) [2**The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Chocolate 5kg)**The Bulk Protein Company**£27.39**4.1★1,912 rev](https://www.amazon.co.uk/dp/B07CGHS11Z) [3**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★1,220 rev](https://www.amazon.co.uk/dp/B01AEWOIBA) [4**SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Strawberry)**The Bulk Protein Company**£33.06**4.0★1,021 rev](https://www.amazon.co.uk/dp/B01EYCXIQM) [5**Serious Shredz 4kg Diet Whey Protein Powder Contains L-Carnitine L-Tartrate and Green Tea Extract Supports Lean Muscle Growth 133 Servings The Bulk Protein Company (Salted Caramel)**The Bulk Protein Company**£33.63**4.1★503 rev](https://www.amazon.co.uk/dp/B08S3JQ6DY)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SERIOUS Protein Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Salted Caramel)**The Bulk Protein Company**£32.14**169 rev2y ago](https://www.amazon.co.uk/dp/B0D4ZHFPCZ) [**SERIOUS Protein Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Banana)**The Bulk Protein Company**£32.73**563 rev3y ago](https://www.amazon.co.uk/dp/B0BWGH3V4S) [**Serious Shredz 4kg Diet Whey Protein Powder Contains L-Carnitine L-Tartrate and Green Tea Extract Supports Lean Muscle Growth 133 Servings The Bulk Protein Company (Salted Caramel)**The Bulk Protein Company**£33.63**503 rev5y ago](https://www.amazon.co.uk/dp/B08S3JQ6DY) [**Serious Shredz 4kg Diet Whey Protein Powder Contains L-Carnitine L-Tartrate and Green Tea Extract Supports Lean Muscle Growth 133 Servings The Bulk Protein Company (Double Chocolate)**The Bulk Protein Company**£33.80**234 rev5y ago](https://www.amazon.co.uk/dp/B08S34763L) [**Serious Shredz 4kg Diet Whey Protein Powder Contains L-Carnitine L-Tartrate and Green Tea Extract Supports Lean Muscle Growth 133 Servings The Bulk Protein Company (Strawberry)**The Bulk Protein Company**£34.53**413 rev5y ago](https://www.amazon.co.uk/dp/B08S35F91Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SERIOUS GAINZ 5kg (40 Servings) Mass Gainer Protein Powder ~27g Protein ~460 Calories ~74g Carbs Weight Gainer Shake with Whey Isolate & Oat Flour Post-Workout Recovery Black Cherry**The Bulk Protein Company**£28.20**4.1★**▲ 204%**](https://www.amazon.co.uk/dp/B01AEWOI7Y) [**SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)**The Bulk Protein Company**£30.55**3.9★**▲ 46%**](https://www.amazon.co.uk/dp/B01CCSJRP6) [**The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Strawberry 5kg)**The Bulk Protein Company**£29.95**4.1★**▲ 45%**](https://www.amazon.co.uk/dp/B01K511Y58) [**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★**▲ 28%**](https://www.amazon.co.uk/dp/B01AEWOIBA) [**Optimum Nutrition Gold Standard 100% Whey Protein Powder 4.53 kg**Optimum Nutrition**£107.63**4.5★**▲ 25%**](https://www.amazon.co.uk/dp/B000GIQT3I)
**~~View all trending →~~**
## **What buyers say about protein powder 5kg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**19%
*“Decent taste”*
**Value For Money**17%
*“Good value”*
**Nutritional Content**14%
*“Good supplement”*
**Flavor**7%
*“Nice flavour”*
**Quality-Overall**7%
*“Excellent product”*
**Solubility**4%
*“Yeah mixes easy”*
**Blend/Ratio**3%
*“mixes well”*
**Advertised Vs Actual Product**2%
*“does the job”*
**Ease Of Use**2%
*“Easy to use”*
**Weight Loss**2%
*“Helping with weight loss aswell”*
### **What buyers complain about **
**Taste-Overall**28%
*“Does not taste good”*
**Nutritional Content**11%
*“Also found out its not proper protein its soy protein”*
**Flavor**8%
*“Flavour is very weak with this power”*
**Value For Money**5%
*“Cheaper”*
**Texture/Consistency-Overall**4%
*“making a chalky texture”*
**Solubility**3%
*“Doesn't dissolve very well”*
**Quality-Overall**3%
*“Terrible quality, doesn't mix”*
**Thickness**1%
*“Those it thickens when it's mixed”*
**Advertised Vs Actual Product**1%
*“misleading”*
**Smell**1%
*“Flavour and smell is also vile”*
## **Common questions**
- **Is protein powder 5kg profitable to sell on Amazon United Kingdom?**
- The niche generates £321K/yr across 18 tracked products. 90-day search growth is -8.0%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the protein powder 5kg niche?**
- 4 brands and 28 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in protein powder 5kg?**
- Top complaints mined from reviews: Taste-Overall, Nutritional Content, Flavor. The return rate is 0.1%.
- **When does demand for protein powder 5kg peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the protein powder 5kg niche?**
- Listings span £26.41–£107.63; the average listing price is £37.21 (sweet spot $15–$100). The average incumbent carries 1,171 reviews — the moat a new listing must climb.
## **Related niches in Health & Personal Care**
- 69 [**cooling towel**](https://flapen.com/research/uk/health-personal-care/cooling-towel)£1.1M/yr>1,000%**Launch it**- 70 [**collagen**](https://flapen.com/research/uk/health-personal-care/collagen)£6.6M/yr-20.1%**Worth a look**- 70 [**dry skin remover feet**](https://flapen.com/research/uk/health-personal-care/dry-skin-remover-feet)£236K/yr+78.2%**Worth a look**- 70 [**stryde knee strap**](https://flapen.com/research/uk/health-personal-care/stryde-knee-strap)£112K/yr>1,000%**Worth a look**- 70 [**libre 2 sensor covers**](https://flapen.com/research/uk/health-personal-care/libre-2-sensor-covers)£240K/yr+67.1%**Worth a look**- 70 [**water retention tablets**](https://flapen.com/research/uk/health-personal-care/water-retention-tablets)£470K/yr+47.2%**Worth a look**[**All Health & Personal Care niches **](https://flapen.com/research/uk/health-personal-care)