protein powder 5kg
Worth a lookShows low returns (0.1%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Avg price
Incredible£37.21avg listing price — sweet spot $15–$100
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Price range
Great£26.41–£107.63cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good1,171.28avg incumbent reviews — the moat a new listing must climb
Conversion
Good4.6%search→purchase rate — share of searches ending in a sale
Market size
Good£321K£321K/yr · 188K searches
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Growth
Bad-8.0%90-day search growth — must beat 0% to launch
Brand share
Bad100%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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
Top protein powder 5kg search terms
- serious protein37K/yr
- whey protein powder 5kg21K/yr
- protein powder 5kg29K/yr
- serious gainz25K/yr
- 5kg protein powder14K/yr
- protein powder 4kg7K/yr
- whey protein 5kg8K/yr
- serious gainz protein powder7K/yr
- 5kg whey protein10K/yr
- 4kg protein powder5K/yr
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.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)
The Bulk Protein Company£30.553.9★1,280 rev
The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Chocolate 5kg)
The Bulk Protein Company£27.394.1★1,912 rev
The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Vanilla 5kg)
The Bulk Protein Company£27.994.0★1,220 rev
SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Strawberry)
The Bulk Protein Company£33.064.0★1,021 rev
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£33.634.1★503 rev
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£32.14169 rev
SERIOUS Protein Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Banana)
The Bulk Protein Company£32.73563 rev
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£33.63503 rev
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£33.80234 rev
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£34.53413 rev
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£28.204.1★
SERIOUS PROTEIN Protein Powder 4kg Low Carb Supports Lean Muscle Growth Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)
The Bulk Protein Company£30.553.9★
The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Strawberry 5kg)
The Bulk Protein Company£29.954.1★
The Bulk Protein Company SERIOUS GAINZ - Whey Protein Powder - Weight Gain Mass Gainer - 30g Protein Powders (Vanilla 5kg)
The Bulk Protein Company£27.994.0★
Optimum Nutrition Gold Standard 100% Whey Protein Powder 4.53 kg
Optimum Nutrition£107.634.5★
What buyers say about protein powder 5kg
What buyers praise and complain about, mined from review topics.What buyers love
“Decent taste”
“Good value”
“Good supplement”
“Nice flavour”
“Excellent product”
“Yeah mixes easy”
“mixes well”
“does the job”
“Easy to use”
“Helping with weight loss aswell”
What buyers complain about
“Does not taste good”
“Also found out its not proper protein its soy protein”
“Flavour is very weak with this power”
“Cheaper”
“making a chalky texture”
“Doesn't dissolve very well”
“Terrible quality, doesn't mix”
“Those it thickens when it's mixed”
“misleading”
“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.