Is selenium profitable to sell on Amazon United Kingdom?

The niche generates £207K/yr across 12 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -13.6%. Flapen's verdict: Skip it (44/100).

How competitive is the selenium niche?

12 brands and 16 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in selenium?

Top complaints mined from reviews: Functionality-Overall, Smell, Value For Money. The return rate is 0.0%.

When does demand for selenium peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the selenium niche?

Listings span £4.81–£13.87; the average listing price is £7.83 (sweet spot $15–$100). The average incumbent carries 2,010 reviews — the moat a new listing must climb.

selenium

Skip it

Prices mostly outside the sweet spot ($4.81–$13.87) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible15.0%

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

Brand share

Good71%

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

Review moat

Okay2,009.83

avg incumbent reviews — the moat a new listing must climb

Market size

Okay£207K

£207K/yr · 176K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad71%

top-5 click share — a locked-up shelf

Avg price

Bad£7.83

avg listing price — sweet spot $15–$100

Growth

Bad-13.6%

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

Price range

Bad£4.81–£13.87

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

According to Flapen's Amazon United Kingdom niche tracking, selenium is a £207K/yr Amazon United Kingdom market (176K searches/yr). The top 5 brands hold 71% of demand. Verdict: Skip it — 44/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

selenium market data

Units sold / yr: 25K–30K; avg 1,500–2,000/product
Revenue / yr: £196K–£235K; units × avg price
Conversion rate: 15.0%
Avg BSR: #7
Page quality: 0%
Prime: 100%
Sponsored: 83%
Out of stock: 7.7%
Avg brand age: 66 months
Avg seller age: 174 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

12 rising

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

22%

WeightWorld34%
Solgar13%
NEW LEAF PRODUCTS10%
Nutravita7%
Zipvit7%
Horbäach6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -13.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top selenium search terms

selenium109K/yr -18.0%12.8% conv.
selenium supplements52K/yr -4.6%11.6% conv.
selenium 200mcg5K/yr -16.3%11.8% conv.
selenomethionine3K/yr -3.7%8.2% conv.
selen4K/yr -10.6%4.0% conv.
selenium supplement3K/yr -4.3%8.8% conv.

All search terms

Top selenium 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 12 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Selenium Supplements 200mcg - 365 Tablets - 1 Year Supply - Bioavailable Sodium Selenite Form - 1-a-Day - Small in Size (6mm) - Vegan & Non-GMO Selenium Tablets

WeightWorld£7.854.5★3,300 rev

Solgar Selenium (Yeast-Free) 200 g Tablets - Pack of 50 - Healthy Hair and Nails - Supports the Immune System - Vegan and Gluten Free

Solgar£8.034.7★2,521 rev

Selenium Tablets - 365 Vegan Selenium Tablets 200g Per Serving - Supports Normal Immune System & Thyroid Function - 12 Month Supply Made in The UK By New Leaf

NEW LEAF PRODUCTS£8.194.8★79 rev

Nutravita Selenium Supplements 250mcg ACE with Vitamin A C & E - 400 Vegan Tablets (1+ Year Supply) - Support Normal Function of Immune System & Thyroid - Support Hair Skin & Nails - Made in the UK

Nutravita£4.814.6★184 rev

Zipvit Selenium 200mcg with Vitamins A C E. 180 Vegan Tablets. Supports Normal Thyroid Skin Hair & Nails Immune System and Antioxidant Protection. 6 Month Supply. UK Supplier.

Zipvit£6.624.6★2,134 rev

Newest

by launch date

Selenium Tablets - 365 Vegan Selenium Tablets 200g Per Serving - Supports Normal Immune System & Thyroid Function - 12 Month Supply Made in The UK By New Leaf

NEW LEAF PRODUCTS£8.1979 rev

9mo ago

Nutravita Selenium Supplements 250mcg ACE with Vitamin A C & E - 400 Vegan Tablets (1+ Year Supply) - Support Normal Function of Immune System & Thyroid - Support Hair Skin & Nails - Made in the UK

Nutravita£4.81184 rev

11mo ago

Solaray Selenium 200mcg 90 Vegan Capsules L-Selenomethionine Supplement

SOLARAY£6.3248 rev

1y ago

Selenium 200g - 120 Capsules 4 Month Supply as Selenomethionine the Naturally Occurring Form with Superior bioavailability - Made in the UK

swiss bioenergetics£7.87197 rev

2y ago

Selenium Supplements 200mcg - 365 Tablets - 1 Year Supply - Bioavailable Sodium Selenite Form - 1-a-Day - Small in Size (6mm) - Vegan & Non-GMO Selenium Tablets

WeightWorld£7.853,300 rev

5y ago

What buyers say about selenium

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

What buyers love

Hair Growth21%

“Helps your hair grow”

Quality-Overall17%

“Amazing quality”

Value For Money14%

“Good price”

Ease Of Chewing/Swallowing8%

“Easy to swallow”

Vitamin4%

“Great supplement works well”

Ease Of Use3%

“easy to use”

Advertised Vs Actual Product3%

“Yes it does the job”

Side Effects2%

“I saw no effects for a while”

Thickness2%

“Excellent product hair looks a little thicker”

Efficiency2%

“results are subtle”

What buyers complain about

Functionality-Overall15%

“Did not work”

Smell8%

“they smell foul”

Value For Money6%

“a £2 price increase”

Thickness6%

“Hair has come a bit thicker”

Hair Related6%

“My hair was falling out in clumps”

Dosage4%

“I only take 1 a day not 2”

Size-Overall4%

“Theyre also tiny”

Nutritional Content4%

“When I looked into it I also noticed this level of biotin is really quite unnecessary”

Side Effects3%

“Not sure about these as they made me ill”

Vitamin3%

“Started taking this along side my other Vitamins x thinking it would help x how wrong I was x caused me to break out in dreadful spots on”

Common questions

Is selenium profitable to sell on Amazon United Kingdom?: The niche generates £207K/yr across 12 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -13.6%. Flapen's verdict: Skip it (44/100).
How competitive is the selenium niche?: 12 brands and 16 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in selenium?: Top complaints mined from reviews: Functionality-Overall, Smell, Value For Money. The return rate is 0.0%.
When does demand for selenium peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the selenium niche?: Listings span £4.81–£13.87; the average listing price is £7.83 (sweet spot $15–$100). The average incumbent carries 2,010 reviews — the moat a new listing must climb.