hydrating serum
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Avg price
Great£21.04avg listing price — sweet spot $15–$100
Conversion
Great8.7%search→purchase rate — share of searches ending in a sale
Price range
Great£6.89–£41.21cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Market size
Okay£270K£270K/yr · 148K searches
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Review moat
Bad10,418.24avg incumbent reviews — the moat a new listing must climb
Growth
Bad-15.2%90-day search growth — must beat 0% to launch
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, hydrating serum is a £270K/yr Amazon United Kingdom market (148K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 48/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
hydrating serum market data
- Units sold / yr
- 8K–10K
- avg 250–500/product
- Revenue / yr
- £168K–£210K
- units × avg price
- Conversion rate
- 8.7%
- Avg BSR
- #214
- Page quality
- 0%
- Prime
- 95%
- Sponsored
- 95%
- Out of stock
- 8.0%
- Avg brand age
- 51 months
- Avg seller age
- 146 days
Competition & brand share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
4 rising
Sellers
54
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
64%
Top 20: 99%
Open market
0%
- La Roche-Posay77%
- CeraVe19%
- The Ordinary3%
- medicube1%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -15.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.7×
Top hydrating serum search terms
- la roche posay serum21K/yr
- cerave hyaluronic acid serum25K/yr
- mela b3 la roche posay13K/yr
- cerave hydrating hyaluronic acid serum20K/yr
- la roche posay mela b3 serum13K/yr
- la roche posay hyalu b5 serum13K/yr
- cerave serum hyaluronic acid8K/yr
- la roche posay hyalu b54K/yr
- la roche posay hyaluronic acid4K/yr
- la roche posay b5 serum4K/yr
Top hydrating serum 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.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
La Roche-Posay Mela B3 Serum Intense Anti-Dark Spot Face Serum Hyperpigmentation Treatment Multi-Patented Melasyl 10% Niacinamide Post-Acne Marks Reducer For Sensitive Skin 30ml
La Roche-Posay£28.674.2★13,944 rev
La Roche-Posay Hyalu B5 Suractivated Serum Anti-Wrinkle Replumping Face Treatment with 4 Hyaluronic Acid System and Vitamin B5 for All Sensitive Skin Types 30ml
La Roche-Posay£28.214.6★1,099 rev
CeraVe Hydrating Hyaluronic Acid Serum Gel For All Skin Types 30ml
CeraVe£12.844.4★6,225 rev
La Roche Posay Effaclar Anti-Aging Facial Serum with Salicylic Acid Glycolic Acid & Niacinamide Ultra Concentrated Targeted Treatment for Blemishes Fine Lines & Large Pores 30ml
La Roche-Posay£22.444.4★18,154 rev
La Roche Posay MelaB3 Serum Dark Spot Corrector With Melasyl Niacinamide and Thermal Spring Water Intensive Anti-Dark Spot Concentrate for Hyperpigmentation 50ml
La Roche-Posay£41.214.3★407 rev
Newest
by launch date
La Roche Posay Hyalu B5 Suractivated Hyaluronic Acid Serum Anti-Aging Face Serum with 4 Forms of Hyaluronic Acid & Vitamin B5 Replumping & Repairing Treatment for Sensitive Skin 50ml
La Roche-Posay£40.21127 rev
La Roche-Posay Hyalu B5 Suractivated Serum Anti-Wrinkle Replumping Face Treatment with 4 Hyaluronic Acid System and Vitamin B5 for All Sensitive Skin Types 30ml
La Roche-Posay£28.211,099 rev
La Roche-Posay Hyalu B5 Suractivated Anti-Wrinkle Firming Cream with 3 forms of Hyaluronic Acid Vitamin B5 and Ectoin Strengthens Skin Barrier 50ml
La Roche-Posay£24.761,053 rev
CeraVe Skin Renewing Retinol Serum With 3 Essential Ceramides Hyaluronic Acid & Niacinamide Anti-Ageing Treatment for Fine Lines and Wrinkles Encapsulated Retinol Dermatologist Developed 30ml
CeraVe£18.07182 rev
La Roche Posay MelaB3 Serum Dark Spot Corrector With Melasyl Niacinamide and Thermal Spring Water Intensive Anti-Dark Spot Concentrate for Hyperpigmentation 50ml
La Roche-Posay£41.21407 rev
Trending
90-day click momentumLa Roche Posay MelaB3 Serum Dark Spot Corrector With Melasyl Niacinamide and Thermal Spring Water Intensive Anti-Dark Spot Concentrate for Hyperpigmentation 50ml
La Roche-Posay£41.214.3★
La Roche Posay Hyalu B5 Suractivated Hyaluronic Acid Serum Anti-Aging Face Serum with 4 Forms of Hyaluronic Acid & Vitamin B5 Replumping & Repairing Treatment for Sensitive Skin 50ml
La Roche-Posay£40.214.6★
medicube Salmon DNA PDRN Pink Peptide Serum Pink glow serum Peptide Niacinamide Hydrating & Moisturising & Firming Uneven Skin Tone Korean Skincare | 1.01 fl.oz. (1.01 fl.oz. Salmon DNA PDRN)
medicube£11.314.5★
CeraVe Regenerierende Augencreme + Feuchtigkeitslotion 14 ml Cream
CeraVe£12.634.1★
La Roche-Posay Hyalu B5 Suractivated Serum Anti-Wrinkle Replumping Face Treatment with 4 Hyaluronic Acid System and Vitamin B5 for All Sensitive Skin Types 30ml
La Roche-Posay£28.214.6★
What buyers say about hydrating serum
What buyers praise and complain about, mined from review topics.What buyers love
“Luxury quality at affordable price”
“Great for sensitive skin”
“Good moisturiser”
“So smooth”
“Worth the money”
“Excellent for dry skin”
“Gives your face a natural glow”
“Goes on beautifully absorbs perfectly”
“As advertised”
“It smells good”
What buyers complain about
“My skin became red”
“Not worth the price”
“Awful smell not for me”
“it started to make my under eyes really dry”
“it may just be me it's not working for”
“Shocked they cam sell something that can hurt the skin this badly”
“again kinda sticky”
“completely drys out the skin top until crusty”
“Instead it felt tight”
“Made my skin quite oily”
Top return reasons
Common questions
- Is hydrating serum profitable to sell on Amazon United Kingdom?
- The niche generates £270K/yr across 21 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -15.2%. Flapen's verdict: Skip it (48/100).
- How competitive is the hydrating serum niche?
- 4 brands and 54 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in hydrating serum?
- Top complaints mined from reviews: Allergies, Value For Money, Smell. The return rate is 0.2%.
- When does demand for hydrating serum peak?
- Demand is steady year-round — the busiest month runs 1.7× the quietest.
- What does it cost to enter the hydrating serum niche?
- Listings span £6.89–£41.21; the average listing price is £21.04 (sweet spot $15–$100). The average incumbent carries 10,418 reviews — the moat a new listing must climb.