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Melatonin

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

Flapen Score

61
Worth a look
Market size 79Growth 9Conversion 41Competition 55Returns 100Price range 57Avg price 67Brand share 78Review moat 46Quality gap 88
This niche Category average

Is Melatonin profitable on Amazon?

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.

Melatonin: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -32.5% over the last 90 days and 3.2% of searches end in a purchase.

£1.1M

revenue / yr

Units sold / yr100K
Search volume / yr-32.5%2.4M
Conversion rate3.2%
Avg price£14.03

Who owns the niche?

The top 5 brands hold 57% of demand, so 43% of the market is open.

43%

open market share

Brands · sellers24 · 55
Top-5 product click share52%
Open market43%
Avg brand age32 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.1★ — the gap to enter on.

0/100

page quality · 31 products

Sponsored placement84%
New entrants (1y)12· 6 succeeded
Avg rating4.1★
Avg reviews1,884

Top Melatonin products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

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

£0£44K£88K£131K£175K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

24 falling

Sellers

55

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%

Melatonin demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume2.4MCVR3.2%Products31Brands24Top 5 Brands57%OOS Rate6.7%Rating4.1★Reviews1,884Avg BSR#445
70K50KSpike '24Spike '25Spike '26SepDecMarJunAugNovMarMay

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

Top Melatonin search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • melatonin890K/yr
  • melatonin gummies537K/yr
  • sleep gummies352K/yr
  • melatonin tablets for sleeping172K/yr
  • lemme sleep gummies91K/yr
  • sleep gummies for adults83K/yr
  • melatonin tablets45K/yr
  • sleeping gummies27K/yr
  • melatonin 5mg24K/yr
  • melatonin gummies for adults29K/yr

What reviews say buyers love and hate about Melatonin

What buyers mention most, as a share of all reviews.

What buyers love

76% of reviews
Sleep Quality32%

HELPS WITH SLEEP

Quality-Overall11%

Excellent product

Value For Money7%

Good value for money

Taste-Overall6%

Good taste

Magnesium6%

Best magnesium capsules

What buyers complain about

63% of reviews
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

Melatonin return rate & reasons

Why buyers send it back, as a share of all return requests.

0.1%

Return rate

0%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Joint Pain
50%
2Magnesium
50%

Common Melatonin questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Melatonin 61/100 on Amazon United Kingdom — Worth a look. The niche generates £1.1M/yr across 31 tracked products. 6 of 12 products launched in the last 360 days are still selling. Search demand moved -32.5% over the last 90 days.
Search demand for Melatonin on Amazon United Kingdom peaks in Jan–Feb, where the busiest month runs 1.7× the quietest.