Is lysine profitable to sell on Amazon United Kingdom?

The niche generates £458K/yr across 8 tracked products. 90-day search growth is -12.1%. Flapen's verdict: Skip it (43/100).

How competitive is the lysine niche?

8 brands and 28 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 90% of demand.

What do buyers complain about in lysine?

Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Dosage. The return rate is 0.1%.

When does demand for lysine peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the lysine niche?

Listings span £5.19–£14.12; the average listing price is £8.28 (sweet spot $15–$100). The average incumbent carries 2,317 reviews — the moat a new listing must climb.

lysine

Skip it

Prices mostly outside the sweet spot ($5.19–$14.12) — this niche doesn't clear our bar today.

Conversion

Incredible19.5%

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

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Market size

Good£458K

£458K/yr · 283K searches

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Okay2,316.63

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad90%

top-5 brand share — brand-locked demand

Avg price

Bad£8.28

avg listing price — sweet spot $15–$100

Growth

Bad-12.1%

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

Competition

Bad90%

top-5 click share — a locked-up shelf

Price range

Bad£5.19–£14.12

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

According to Flapen's Amazon United Kingdom niche tracking, lysine is a £458K/yr Amazon United Kingdom market (283K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 43/100.

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

lysine market data

Units sold / yr: 50K–60K; avg 6,000–8,000/product
Revenue / yr: £414K–£497K; units × avg price
Conversion rate: 19.5%
Avg BSR: #5
Page quality: 0%
Prime: 100%
Sponsored: 75%
Out of stock: 0.0%
Avg brand age: 61 months
Avg seller age: 170 days

Competition & brand share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

90%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

Natures Aid41%
NEW LEAF PRODUCTS28%
Solgar10%
Best Naturals7%
Carlyle4%
Horbäach4%
Open — no brand owns it (2 brands, 6%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -12.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top lysine search terms

lysine85K/yr -9.4%16.3% conv.
lysine tablets51K/yr -17.2%20.3% conv.
l lysine38K/yr -2.6%15.6% conv.
l-lysine32K/yr +0.2%15.0% conv.
cold sore tablets12K/yr -9.4%4.0% conv.
l lysine capsules 2000mg14K/yr -9.1%18.0% conv.
l lysine capsules 1000mg10K/yr -5.9%16.1% conv.
lysine for cold sores10K/yr -42.6%9.7% conv.
l-lysine 1000mg tablets7K/yr -32.4%19.5% conv.
l-lysine nutritional supplements6K/yr -30.3%10.9% conv.

All search terms

Top lysine 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Natures Aid L-Lysine 1000mg High Strength Essential Amino Acid Supports Immune System Muscle Recovery Collagen Bone Health & Energy Vegan Gluten-Free - 60 Tablets

Natures Aid£5.874.5★4,592 rev

L-Lysine Tablets 2000mg - High Strength Lysine Nutritional Supplements - Essential Amino Acid L Lysine - 120 Vegan Lysine Tablets 2 Month Supply Made in The UK By New Leaf

NEW LEAF PRODUCTS£8.114.5★474 rev

Solgar L-Lysine 1000 mg Tablets - Pack of 50 - Support for an Active Lifestyle - Vegan and Gluten Free

Solgar£7.234.5★5,957 rev

Best Naturals L-Lysine 1000 mg 180 Tablets

Best Naturals£9.974.6★5,718 rev

L-Lysine 2950mg | 90 Tablets | Essential Amino Acid | High Strength Vegan Supplement | by Carlyle

Carlyle£5.194.5★204 rev

Newest

by launch date

L-Lysine Tablets 2000mg - High Strength Lysine Nutritional Supplements - Essential Amino Acid L Lysine - 120 Vegan Lysine Tablets 2 Month Supply Made in The UK By New Leaf

NEW LEAF PRODUCTS£8.11474 rev

1y ago

L-Lysine 2950mg | 90 Tablets | Essential Amino Acid | High Strength Vegan Supplement | by Carlyle

Carlyle£5.19204 rev

2y ago

Nutravita L-Lysine 1100mg High Strength - 240 Vegan & Gluten Free Tablets (8 Month Supply) - Cold Sore Treatment Essential Amino Acid Supplement - Normal Growth and Muscle Turnover - Made in The UK

Nutravita£14.12899 rev

5y ago

Horbäach£8.39510 rev

5y ago

Fermented L-Lysine 1500mg with BioPerine - Made with Vitamin C - High Strength - 120 Vegan Capsules Resealable and Recyclable Pouch By Alpha01

ALPHA01£7.35179 rev

7y ago

What buyers say about lysine

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

What buyers love

Cold Relief31%

“Helps combat Coldsores”

Quality-Overall11%

“Excellent product”

Value For Money8%

“Competitive price”

Ease Of Chewing/Swallowing8%

“didn't cause any issues in swallowing”

Advertised Vs Actual Product5%

“As described”

Efficiency5%

“Very effective”

Vitamin4%

“Effective supplement”

Side Effects3%

“Extremely effective against cold sores”

Taste-Overall2%

“you will find they have a nice seeet taste”

Fever Relief2%

“Effective for my Coldsores”

What buyers complain about

Size-Overall31%

“Quite a large tablet”

Ease Of Chewing/Swallowing12%

“Can't swallow like putting massive bricks down Ur throat”

Dosage5%

“would of been better if the dosage were split into 3 pills so the pills aren't so huge impossible to swallow”

Allergies4%

“when I woke up with what promised to be a HUGE cold sore”

Smell3%

“Horrible smell”

Oral Hygiene3%

“Ginormous Tablets, got stuck in my throat, trying to swallow them, wont be trying again”

Side Effects3%

“I have only been taking them for a few days so don't know the effects yet”

Skin Health2%

“It works for me very itchy skin”

Taste-Overall2%

“they are tasteless”

Stuck/Fused Together2%

“if you break them in half they get stuck”

Common questions

Is lysine profitable to sell on Amazon United Kingdom?: The niche generates £458K/yr across 8 tracked products. 90-day search growth is -12.1%. Flapen's verdict: Skip it (43/100).
How competitive is the lysine niche?: 8 brands and 28 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 90% of demand.
What do buyers complain about in lysine?: Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Dosage. The return rate is 0.1%.
When does demand for lysine peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the lysine niche?: Listings span £5.19–£14.12; the average listing price is £8.28 (sweet spot $15–$100). The average incumbent carries 2,317 reviews — the moat a new listing must climb.