Is baby magnesium profitable to sell on Amazon United Kingdom?

The niche generates £23K/yr across 10 tracked products. 90-day search growth is -45.4%. Flapen's verdict: Skip it (35/100).

How competitive is the baby magnesium niche?

7 brands and 40 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 95% of demand.

What do buyers complain about in baby magnesium?

Top complaints mined from reviews: Smell, Functionality-Overall, Allergies. The return rate is 0.1%.

When does demand for baby magnesium peak?

Demand peaks in Jan–Feb; the busiest month runs 2.3× the quietest.

What does it cost to enter the baby magnesium niche?

Listings span £5.89–£16.68; the average listing price is £8.37 (sweet spot $15–$100). The average incumbent carries 1,427 reviews — the moat a new listing must climb.

baby magnesium

Skip it

Soft demand (-45.4% this quarter) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great9.8%

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

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Review moat

Good1,427.1

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£8.37

avg listing price — sweet spot $15–$100

Price range

Bad£5.89–£16.68

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

Competition

Bad84%

top-5 click share — a locked-up shelf

Brand share

Bad95%

top-5 brand share — brand-locked demand

Market size

Bad£23K

£23K/yr · 28K searches

Growth

Bad-45.4%

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

According to Flapen's Amazon United Kingdom niche tracking, baby magnesium is a £23K/yr Amazon United Kingdom market (28K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Jan–Feb. Verdict: Skip it — 35/100.

Data updated Jul 18, 2026 · scored weekly · How we score niches

baby magnesium market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: £21K–£25K; units × avg price
Conversion rate: 9.8%
Avg BSR: #170
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.6%
Avg brand age: 30 months
Avg seller age: 187 days

Competition & brand share

The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

84%

Top 20: 100%

Open market

BetterYou62%
ZyranovaE17%
Epigenetics8%
Feather & Down5%
NaturallyMum3%
Bieyoc2%
Open — no brand owns it (1 brand, 2%)

Demand & seasonality

Weekly Amazon search volume, last 75 weeks — -45.4% search growth over the last 90 days.

Peak months: Jan, Feb · busiest ÷ quietest = 2.3×

Open Trend

Top baby magnesium search terms

magnesium spray kids5K/yr -33.2%7.5% conv.
magnesium cream for kids7K/yr -60.3%12.4% conv.
baby magnesium3K/yr -28.3%5.1% conv.
kids magnesium spray2K/yr -29.0%10.6% conv.
magnesium for babies3K/yr -60.4%4.8% conv.
magnesium spray for kids2K/yr -43.7%6.9% conv.
better you magnesium spray kids2K/yr -37.3%9.5% conv.
magnesium sleep cream kids1K/yr -22.9%9.7% conv.
magnesium butter for kids1K/yr -63.7%9.5% conv.

All search terms

Top baby magnesium 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

BetterYou Magnesium Sleep Kids Body Lotion Pure Magnesium Chloride with Lavender and Chamomile Essential Oils Paediatrician Approved Dermatologically Tested and Suitable for Sensitive Skin

BetterYou£6.684.2★1,592 rev

Magnesium Cream for Kids Magnesium Lotion for Sleep Natural Bedtime Lotion Relaxation & Relieves Stress Natural Body Butter for Deep Hydration - Safe for Kids

ZyranovaE£6.654.1★101 rev

BetterYou Magnesium Sleep Body Spray Made with Zechstein Magnesium Chloride and Essential Oils Magnesium Supplement Natural Sleep Aid Palm-Oil Free 100ml (600 Sprays)

BetterYou£7.344.2★5,931 rev

Magnesium for Kids Children & Baby 30ml | Supports Sleep & Relaxation Helps Calm & Focus Supplements for 0-11 Years | Bones Teeth & Energy | Sugar & Flavouring Free UK Made Vegan

Epigenetics£13.314.2★137 rev

Feather & Down Magnesium Butter for Sleep - Lavender & Chamomile Soothing Body Butter (300ml) to support relaxation in your self care routine.

Feather & Down£5.894.5★3,623 rev

Newest

by launch date

Magnesium Cream for Kids Magnesium Lotion for Sleep Natural Bedtime Lotion Relaxation & Relieves Stress Natural Body Butter for Deep Hydration - Safe for Kids

ZyranovaE£6.65101 rev

1y ago

Magnesium Lotion for Kids Magnesium Cream for Sleep Calm Magnesium Cream Baby Magnesium Lotion With Lavender Essential Oils Body Skin Care for Relaxation Muscle Comfort

MrCuvaryas£6.5816 rev

1y ago

Magnesium Spray Magnesium Oil for Feet Pure Magnesium Oil Spray for Sleep Topical Magnesium Spray 100% Pure and Organic Glass Bottle Travel Size 60ml

Bieyoc£6.98512 rev

2y ago

Magnesium for Kids Children & Baby 30ml | Supports Sleep & Relaxation Helps Calm & Focus Supplements for 0-11 Years | Bones Teeth & Energy | Sugar & Flavouring Free UK Made Vegan

Epigenetics£13.31137 rev

2y ago

Kids Magnesium Bedtime Lotion for Better Sleep | All-Natural Sleeping Aid for Children | Alternative to Melatonin | Lavender & Chamomile Essential Oil | 120ml

NaturallyMum£16.68700 rev

4y ago

What buyers say about baby magnesium

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

What buyers love

Smell40%

“smells divine”

Sleep Quality14%

“Better nights sleep”

Value For Money5%

“Worth every single penny”

Soft Feel5%

“Soft and gentle”

Moist/Dry5%

“Lovely Moisturiser & Smells lovely”

Quality-Overall4%

“Good quality product”

Efficiency3%

“Works well”

Thickness2%

“It also lasts ages as the consistency is thick”

Magnesium2%

“After a family friend suggested magnesium lotion we thought we would give it a go”

Comfort-Overall2%

“Calming”

What buyers complain about

Smell12%

“No fragrance at all”

Functionality-Overall12%

“Doesn't work”

Allergies12%

“Couldnt use the product as made my skin burn and itch”

Sleep Quality10%

“having trouble sleeping”

Value For Money6%

“Since money is tight”

Moist/Dry6%

“You need a good moisturiser”

Magnesium5%

“not as much magnesium as another one from this brand that I have bought”

Adhesion/Stickiness3%

“Sticky”

Size-Overall3%

“The tub is also quite large at 300 ml”

Pain Relief-Overall3%

“I have a very painfull shoulder”

Top return reasons

Smell20%

Advertised Vs Actual Product20%

Functionality-Overall20%

Comfort-Overall7%

Value For Money7%

Dilute/Watery7%

Skin Health7%

Size-Overall7%

Leak-Proof7%

Common questions

Is baby magnesium profitable to sell on Amazon United Kingdom?: The niche generates £23K/yr across 10 tracked products. 90-day search growth is -45.4%. Flapen's verdict: Skip it (35/100).
How competitive is the baby magnesium niche?: 7 brands and 40 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 95% of demand.
What do buyers complain about in baby magnesium?: Top complaints mined from reviews: Smell, Functionality-Overall, Allergies. The return rate is 0.1%.
When does demand for baby magnesium peak?: Demand peaks in Jan–Feb; the busiest month runs 2.3× the quietest.
What does it cost to enter the baby magnesium niche?: Listings span £5.89–£16.68; the average listing price is £8.37 (sweet spot $15–$100). The average incumbent carries 1,427 reviews — the moat a new listing must climb.