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.

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.

Returns

Incredible0.1%

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

Great4.3★

avg incumbent rating — lower means beatable quality

Market size

Good£622K

£622K/yr · 786K searches

Competition

Okay59%

top-5 click share — leaders hold, buyers still browse

Conversion

Okay2.8%

search→purchase rate — share of searches ending in a sale

Review moat

Okay3,739.77

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

Bad92%

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

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

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

59%

Top 20: 97%

Open market

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.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top low calorie protein powder search terms

mass gainer273K/yr -12.0%2.0% conv.
serious mass85K/yr -6.6%4.9% conv.
weight gainer76K/yr -9.8%1.5% conv.
mass gainer protein powder60K/yr -24.6%1.8% conv.
weight gainer for skinny people53K/yr -13.3%1.0% conv.
weight gain41K/yr -12.0%0.9% conv.
optimum nutrition serious mass24K/yr +4.8%4.4% conv.
mass26K/yr -22.6%0.9% conv.
weight gain protein powder23K/yr -7.2%1.2% conv.
mass gainer optimum nutrition12K/yr +18.4%4.1% conv.

All 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.

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

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£28.014.5★12,618 rev

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£25.734.4★18,494 rev

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins Creatine and Glutamine Chocolate 16 Servings 5.45 kg

Optimum Nutrition£44.254.5★15,456 rev

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£20.324.1★656 rev

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£42.754.5★3,231 rev

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£19.3312,618 rev

1y ago

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£18.7732 rev

1y ago

Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder High Calorie Weight Gainer Lean Mass (2.4kg - 16 Servings) (Chocolate)

Applied Nutrition£24.5567 rev

2y ago

Mutant£27.411,425 rev

4y ago

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£24.77568 rev

5y ago

What buyers say about low calorie protein powder

What buyers praise and complain about, mined from review topics.

What buyers love

Taste-Overall18%

“Taste great mixes well”

Quality-Overall13%

“its had so many good reviews”

Nutritional Content10%

“Really good protein powder”

Value For Money10%

“worth every penny”

Flavor7%

“the flavour is really nice”

Weight Gain6%

“I think this will help you gain weight as long as you have this along with your meals”

Weight Loss5%

“Very helpful with getting weight back on”

Size-Overall4%

“Great size”

Blend/Ratio3%

“Perfect blend of everything”

Solubility2%

“it does mix quite well”

What buyers complain about

Taste-Overall20%

“Does not taste good”

Nutritional Content11%

“It's not protein”

Value For Money6%

“Cheap for a reason”

Flavor5%

“The taste of the dutch chocolate flavour shakes are extremely unpleasant”

Size-Overall4%

“HALF THE SIZE BE CAREFUL OF DETAILS”

Weight Loss4%

“Didnt put weight on even though I struggle with eating”

Advertised Vs Actual Product3%

“Please tell me it isnt true”

Sweetness3%

“the only bad is that this gainer is extra sweet”

Mixing/Blending3%

“doesn't really mix well”

Texture/Consistency-Overall3%

“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.