Is melatonin profitable to sell on Amazon United Kingdom?

The niche generates £1.1M/yr across 31 tracked products. 6 of 12 products launched in the last 360 days are still selling. 90-day search growth is -32.5%. Flapen's verdict: Worth a look (61/100).

How competitive is the melatonin niche?

24 brands and 55 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 57% of demand.

What do buyers complain about in melatonin?

Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Magnesium. The return rate is 0.1%.

When does demand for melatonin peak?

Demand peaks in Jan–Feb; the busiest month runs 1.7× the quietest.

What does it cost to enter the melatonin niche?

Listings span £5.18–£28.17; the average listing price is £14.03 (sweet spot $15–$100). The average incumbent carries 1,884 reviews — the moat a new listing must climb.

melatonin

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

Market size

Great£1.1M

£1.1M/yr · 2.4M searches

Brand share

Great57%

top-5 brand share — no brand owns this niche

Avg price

Good£14.03

avg listing price — sweet spot $15–$100

Price range

Good£5.18–£28.17

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

Competition

Good52%

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

Review moat

Okay1,883.9

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay3.2%

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

Growth

Bad-32.5%

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

Signals No Dominant Brand Low Review Barrier Out of Stock

According to Flapen's Amazon United Kingdom niche tracking, melatonin is a £1.1M/yr Amazon United Kingdom market (2.4M searches/yr). The top 5 brands hold 57% of demand. Demand peaks in Jan–Feb. Verdict: Worth a look — 61/100.

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

melatonin market data

Units sold / yr: 80K–100K; avg 1,500–2,000/product
Revenue / yr: £1.1M–£1.4M; units × avg price
Conversion rate: 3.2%
Avg BSR: #445
Page quality: 0%
Prime: 94%
Sponsored: 84%
Out of stock: 6.7%
Avg brand age: 32 months
Avg seller age: 161 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

24 falling

Sellers

Top-5 brand share

57%

Top 20: 96%

Top-5 click share

52%

Top 20: 89%

Open market

37%

Hybrid Health14%
Generic14%
HILLTEN HEALTH14%
Unerder9%
novomins7%
NavoSupply6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -32.5% search growth over the last 90 days.

Peak months: Jan, Feb · busiest ÷ quietest = 1.7×

Open Trend

Top melatonin search terms

melatonin890K/yr -27.9%1.5% conv.
melatonin gummies537K/yr -37.4%2.6% conv.
sleep gummies352K/yr -29.9%4.9% conv.
melatonin tablets for sleeping172K/yr -33.5%1.6% conv.
lemme sleep gummies91K/yr -26.9%0.3% conv.
sleep gummies for adults83K/yr -38.3%5.9% conv.
melatonin tablets45K/yr -33.4%0.7% conv.
sleeping gummies27K/yr -27.0%3.9% conv.
melatonin 5mg24K/yr -21.2%0.7% conv.
melatonin gummies for adults29K/yr -52.0%2.9% conv.

All search terms

Top melatonin 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Sugar-Free Sleep Gummies x 60 Sleep Aid 8-in-1 Formula with Ashwagandha L Theanine 5 HTP Magnesium & More High Strength Natural Berry Flavoured Get Koala-Ty Sleep 60 Gummies

Hybrid Health£12.503.9★390 rev

Natural Sleep Support Gummies for Adults - Melatonic Formula for Restful Nights Sleep Gummies Promoting Natural Melatonin Production Promotes Healthy Sleep Patterns 60 Count

HILLTEN HEALTH£14.274.0★151 rev

szcrearions Night time Gummies x60 | DeepSleepV-Root Magnesium L-Theanine | Natural Bedtime Supplement | Sugar Free Gummies

Generic£16.844.0★61 rev

Sugar Free Sleep Gummies Night Time Gummies x 90 Natural Melatonin Formula Promote Relaxation Helps Improve Sleep Quality with Magnesium L-Theanine Gluten Free

Unerder£15.783.9★12 rev

NavoSupply-Gummies for Sleep Support & Mood Enhancement Sleep Gummies | Natural Berry Flavor Sleep Aid Supplement (90 Gummy)

NavoSupply£18.824.5★1,116 rev

Newest

by launch date

Sweet Dreams Gummies for Adults with Magnesium Lavender Chamomile L-Theanine & Ashwagandha Sleep Supplement Relaxation & Night-Time Support | Sugar Free Vegan 60 Gummies |Berries Flavour| (1)

Izkan£8.8528 rev

2mo ago

Sleep Gummies for Adults - Sleep Aid with 5-HTP Valerian Root Magnesium L-Theanine & Vitamin B6 Alternative to Melatonin Tablets Berry Bliss Flavour 60 Gummies

Keka Naturals£12.5344 rev

3mo ago

Melatonin.High Quality Nighttime Sleep Support.Sleep Supplement.60 Capsules.

Generic£28.175 rev

5mo ago

INTENSE Wellness Easy Sleep Gummies for Adults Magnesium Glycinate 100mg + Valerian Root Ashwagandha & Lemon Balm Sugar-Free Vegan Night-Time Gummies Strawberry 90 Count

Intense Wellness£14.7574 rev

6mo ago

Sleep Oracles Sleep Aid | 600mg Magnesium Glycinate with L-Theanine Passionflower & Valerian Root Relaxation & Sleep Support Blend | Vegan & Gluten Free Night-Time Supplement for Adults | 60 Capsules

Sleep Oracles£9.89376 rev

6mo ago

What buyers say about melatonin

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

What buyers love

Sleep Quality32%

“HELPS WITH SLEEP”

Quality-Overall11%

“Excellent product”

Value For Money7%

“Good value for money”

Taste-Overall6%

“Good taste”

Magnesium6%

“Best magnesium capsules”

Advertised Vs Actual Product3%

“As Advertised”

Efficiency3%

“Does the job”

Ease Of Chewing/Swallowing2%

“Easy to swallow”

Ease Of Use2%

“Easy to use”

Muscle Pain Relief2%

“helps muscle cramps”

What buyers complain about

Sleep Quality21%

“Do not help sleep”

Functionality-Overall14%

“DOESNT WORK”

Magnesium5%

“This magnesium does not work”

Value For Money4%

“Way too expensive”

Dosage3%

“The dosage is far too high”

Acid Regulator/Stomach Ache Relief3%

“Gives you stomach cramps”

Advertised Vs Actual Product3%

“False information”

Side Effects3%

“Will make you ill”

Taste-Overall3%

“Horrible taste”

Quality-Overall2%

“not as good as expected”

Top return reasons

Joint Pain50%

Magnesium50%

Common questions

Is melatonin profitable to sell on Amazon United Kingdom?: The niche generates £1.1M/yr across 31 tracked products. 6 of 12 products launched in the last 360 days are still selling. 90-day search growth is -32.5%. Flapen's verdict: Worth a look (61/100).
How competitive is the melatonin niche?: 24 brands and 55 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 57% of demand.
What do buyers complain about in melatonin?: Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Magnesium. The return rate is 0.1%.
When does demand for melatonin peak?: Demand peaks in Jan–Feb; the busiest month runs 1.7× the quietest.
What does it cost to enter the melatonin niche?: Listings span £5.18–£28.17; the average listing price is £14.03 (sweet spot $15–$100). The average incumbent carries 1,884 reviews — the moat a new listing must climb.