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Riboflavin 400mg

Fail

Prices span $4.63–$15.81, mostly outside the sweet spot, so Riboflavin 400mg is a Fail.

Flapen Score
40
40 / 100
Ranks 1,670 of 2,035 Health & Personal Care niches · −8 vs the category median of 48
Market size
£76K/yr45K searches / yr
90-day growth
-14.9%search demand this quarter
Competition
90%top-5 click share · 8 brands · 17 sellers

Flapen Score

Riboflavin 400mg against its category

The dotted line is the Health & Personal Care average. Past it, Riboflavin 400mg is stronger. Inside it, weaker.

40Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Riboflavin 400mg market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Riboflavin 400mg 45K times last year and spent an estimated £76K. The top 5 brands take 90% of clicks. Flapen scores it 40 out of 100, a Fail.

01 · Demand

An estimated 15.9% of those searches ended in a purchase.

Shoppers searched for this 45K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 15.9% of those searches ended in a purchase. Searches in the last 90 days moved -14.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £76K a year.

Searches, last 12 months
45K
Growth, 90 days vs prior 90
-14.9%
Conversion, latest week
15.9%
Market size, estimated
£76Ka year
Peak month
March1.4× the quietest month
Top search term
riboflavin 400mg24K searches a year

02 · Price

A sale here is worth £10.66.

Listings sell for £10.66 on average, from £4.63 to £15.81. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 500 to 750 of them. At £10.66 that is £5K to £8K a year per listing.

Average price
£10.66under the $15 to $100 sweet spot
Price range
£4.63–£15.81
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
6K–8K
Units per listing a year
500–750
Revenue per listing a year
£5K–£8K
Returns
0.0%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

75% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.7% of listings are out of stock. The average listing ranks #6 within Vitamins. It carries 2,267 reviews at 4.36 stars, so a new listing needs social proof before a better product.

Sponsored listings
75%
Prime listings
100%
Out of stock, average day
1.7%
Average rank
#6in Vitamins
Average rating
4.36 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,267per listing
Listings tracked
8

04 · Newcomers

0 of last year's 1 launches cleared the first-year sales bar.

1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 71 months on average, so the names here are established.

Launched, last 12 months
1
Successful launches
0Amazon's first-year sales bar
Average brand age
71 months

Products

Top Riboflavin 400mg products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 25, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 90% of clicks. A locked shelf that new listings rarely crack.

£0£11K£23K£34K£46K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

8 rising

Sellers

17

Est. top-5 brand share

90%

Top 20: 100%

Est. top-5 click share

90%

Top 20: 100%

Open market

6%

  • Health4All40%
  • MetaSuperfoods20%
  • Nutricost18%
  • Bespoke Biotics7%
  • Horbäach5%
  • ARC) HEALTH+NUTRITION WWW.ARCHEALTHNUTRITION.CO.UK4%
  • Open — no brand owns it (2 brands, 6%)

Demand

Riboflavin 400mg search demand

Weekly searches over the year, seasonality beneath. Pick a range.

1K600Spike '25Prime Day '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Search terms

Top Riboflavin 400mg search terms shoppers use

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

  • riboflavin 400mg24K/yr
  • vitamin b2 riboflavin 400mg12K/yr
  • riboflavin 400mg migraine6K/yr
  • vitamin b2 400mg4K/yr

Reviews and returns

What reviews say buyers love and hate about Riboflavin 400mg

We read the reviews and the return reasons for every product selling here.

25%of positive reviews mention “Value For Money”
12%of negative reviews mention “Side Effects”
<0.1%of orders come back, a rate Amazon rounds to zero
“Unfortunately these had the opposite effect on me”
A buyer, on “Side Effects”12% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

18 topics

NegativePositive

FAQ

Common Riboflavin 400mg questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data