Is water retention tablets profitable to sell on Amazon United Kingdom?

The niche generates £470K/yr across 20 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is +47.2%. Flapen's verdict: Worth a look (70/100).

How competitive is the water retention tablets niche?

17 brands and 34 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 60% of demand.

What do buyers complain about in water retention tablets?

Top complaints mined from reviews: Functionality-Overall, Dosage, Value For Money. The return rate is 0.1%.

When does demand for water retention tablets peak?

Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.9× the quietest.

What does it cost to enter the water retention tablets niche?

Listings span £5.12–£54.62; the average listing price is £13.40 (sweet spot $15–$100). The average incumbent carries 388 reviews — the moat a new listing must climb.

water retention tablets

Worth a look

Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Review moat

Great387.9

avg incumbent reviews — the moat a new listing must climb

Price range

Great£5.12–£54.62

cheapest to priciest tracked listing — scored on the share inside $15–$100

Brand share

Good60%

top-5 brand share — brands hold most of the demand

Conversion

Good6.7%

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

Growth

Good+47.2%

90-day search growth — must beat 0% to launch

Avg price

Good£13.40

avg listing price — sweet spot $15–$100

Market size

Good£470K

£470K/yr · 524K searches

Competition

Okay60%

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

Signals Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, water retention tablets is a £470K/yr Amazon United Kingdom market (524K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 70/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

water retention tablets market data

Units sold / yr: 30K–40K; avg 1,000–1,250/product
Revenue / yr: £402K–£536K; units × avg price
Conversion rate: 6.7%
Avg BSR: #275
Page quality: 0%
Prime: 90%
Sponsored: 65%
Out of stock: 8.2%
Avg brand age: 45 months
Avg seller age: 165 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

Top-5 brand share

60%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

33%

BioHerbs27%
Vinco Supplements10%
HealthEssent9%
HERA VITALITY7%
HRI7%
NUTRINATION7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +47.2% search growth over the last 90 days.

Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 2.9×

Open Trend

Top water retention tablets search terms

water retention tablets139K/yr +47.8%6.0% conv.
water retention tablets for women60K/yr +76.0%7.6% conv.
water tablets67K/yr +43.7%5.7% conv.
water tablets for fluid retention53K/yr +39.0%7.5% conv.
hri water balance tablets44K/yr +41.3%3.1% conv.
water balance tablets36K/yr +3.8%4.9% conv.
diuretics for water retention20K/yr +25.7%6.5% conv.
water retention16K/yr +51.8%3.4% conv.
water balance13K/yr +128.6%3.8% conv.
water tablets for fluid retention swollen ankles7K/yr +257.1%5.7% conv.

All search terms

Top water retention tablets 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 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Water Retention Tablets - Dandelion Root Capsules 6000mg (4-Month Supply) | 120 Vegan Tablets by BioHerbs

BioHerbs£7.693.9★207 rev

Vinco Dandelion Root Capsules 5000mg - 120 Vegan Capsules (4-Month Supply) - High Strength Herbal Supplement for Bloating & Detox - Water Retention Tablets - Natural Water Balance Support

Vinco Supplements£6.724.2★111 rev

HealthEssent WaterLess Water Retention Tablets with Dandelion Root Green Tea Potassium & Vitamin B6 - (4 Month Supply) Natural Debloat & Fluid Support - 120 Vegan Tablets - Made in UK

HealthEssent£8.874.0★39 rev

WaterEase Dandelion Root Capsules 1600mg 4:1 Extract | High Strength Supplement for Water Retention & Fluid Balance | Vegan Herbal Capsules Digestive Wellness | 90 Capsules | 3 Month Supply

HERA VITALITY£12.264.1★26 rev

Water Retention Tablets - Dandelion Root Capsules 5000mg | (4-Month Supply) 120 Vegan Capsules | High-Strength Herbal Supplement for Bloating Detox & Fluid Balance | Non-GMO & Lab-Tested

NUTRINATION£9.614.1★419 rev

Newest

by launch date

HealthEssent WaterLess Water Retention Tablets with Dandelion Root Green Tea Potassium & Vitamin B6 - (4 Month Supply) Natural Debloat & Fluid Support - 120 Vegan Tablets - Made in UK

HealthEssent£8.8739 rev

3mo ago

Water Retention Tablets - Dandelion Root Capsules 6000mg (4-Month Supply) | 120 Vegan Tablets by BioHerbs

BioHerbs£7.69207 rev

5mo ago

WaterEase Dandelion Root Capsules 1600mg 4:1 Extract | High Strength Supplement for Water Retention & Fluid Balance | Vegan Herbal Capsules Digestive Wellness | 90 Capsules | 3 Month Supply

HERA VITALITY£12.2626 rev

7mo ago

Vitalvibe Lymphatic Drainage Tablets & Water Retention 120 Vegan Capsules

VitalVibe£16.6548 rev

8mo ago

Vinco Dandelion Root Capsules 5000mg - 120 Vegan Capsules (4-Month Supply) - High Strength Herbal Supplement for Bloating & Detox - Water Retention Tablets - Natural Water Balance Support

Vinco Supplements£6.72111 rev

9mo ago

What buyers say about water retention tablets

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

What buyers love

Value For Money13%

“Good value”

Quality-Overall12%

“Quality product”

Ease Of Use8%

“The packet is very easy to use”

Efficiency8%

“Works well”

Ease Of Chewing/Swallowing6%

“Easy to swallow”

Advertised Vs Actual Product5%

“It looks promising”

Water Resistance4%

“Great for water retention”

Side Effects3%

“no side effect”

Weight Loss3%

“Wow amazing I've lost weight on this product”

Dosage2%

“Strong dosage”

What buyers complain about

Functionality-Overall27%

“Absolutely no effect”

Dosage10%

“Most water retention tablets Ive tried are quite low dose”

Value For Money9%

“They are a little more expensive than I would like”

Size-Overall5%

“tablets quite large”

Acid Regulator/Stomach Ache Relief3%

“give me a bad stomach”

Strength3%

“it's just too strong”

Inflammation3%

“My Ankle swells”

Advertised Vs Actual Product3%

“Tiny packet photo is deceptive pack as big as small size peanuts”

Side Effects2%

“the effects are significant”

Allergies2%

“Im sensitivity to it”

Common questions

Is water retention tablets profitable to sell on Amazon United Kingdom?: The niche generates £470K/yr across 20 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is +47.2%. Flapen's verdict: Worth a look (70/100).
How competitive is the water retention tablets niche?: 17 brands and 34 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 60% of demand.
What do buyers complain about in water retention tablets?: Top complaints mined from reviews: Functionality-Overall, Dosage, Value For Money. The return rate is 0.1%.
When does demand for water retention tablets peak?: Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.9× the quietest.
What does it cost to enter the water retention tablets niche?: Listings span £5.12–£54.62; the average listing price is £13.40 (sweet spot $15–$100). The average incumbent carries 388 reviews — the moat a new listing must climb.