Is magnesium citrate profitable to sell on Amazon United Kingdom?

The niche generates £534K/yr across 23 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -17.0%. Flapen's verdict: Worth a look (52/100).

How competitive is the magnesium citrate niche?

18 brands and 64 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 62% of demand.

What do buyers complain about in magnesium citrate?

Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Magnesium. The return rate is 0.1%.

When does demand for magnesium citrate peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the magnesium citrate niche?

Listings span £4.01–£17.01; the average listing price is £9.52 (sweet spot $15–$100). The average incumbent carries 4,974 reviews — the moat a new listing must climb.

magnesium citrate

Worth a look

Shows low returns (0.1%), but prices mostly outside the sweet spot ($4.01–$17.01) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great11.5%

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

Brand share

Good62%

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

Market size

Good£534K

£534K/yr · 490K searches

Competition

Good55%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Avg price

Okay£9.52

avg listing price — sweet spot $15–$100

Review moat

Bad4,973.87

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-17.0%

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

Price range

Bad£4.01–£17.01

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

According to Flapen's Amazon United Kingdom niche tracking, magnesium citrate is a £534K/yr Amazon United Kingdom market (490K searches/yr). The top 5 brands hold 62% of demand. Verdict: Worth a look — 52/100.

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

magnesium citrate market data

Units sold / yr: 50K–60K; avg 2,000–2,500/product
Revenue / yr: £476K–£571K; units × avg price
Conversion rate: 11.5%
Avg BSR: #145
Page quality: 0%
Prime: 100%
Sponsored: 87%
Out of stock: 0.0%
Avg brand age: 50 months
Avg seller age: 167 days

Competition & brand share

The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 rising

Sellers

Top-5 brand share

62%

Top 20: 100%

Top-5 click share

55%

Top 20: 97%

Open market

33%

Solgar27%
WeightWorld16%
Nutrition Geeks7%
PH PROWISE Healthcare6%
Multivita6%
VitaBright6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -17.0% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top magnesium citrate search terms

magnesium citrate335K/yr -13.2%9.8% conv.
solgar64K/yr -19.1%0.7% conv.
magnesium citrate capsules25K/yr -22.2%12.3% conv.
solgar magnesium28K/yr -49.1%10.4% conv.
solgar magnesium citrate7K/yr -1.1%17.4% conv.
magnesium solgar7K/yr -20.2%11.2% conv.
magnesium citrate tablets6K/yr -17.8%8.0% conv.
citrato de magnesio3K/yr -0.4%3.8% conv.
solgar vitamins3K/yr -11.9%0.1% conv.
magnesium citrate for constipation3K/yr -11.7%5.3% conv.

All search terms

Top magnesium citrate 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 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Solgar Magnesium Citrate Tablets - Supports The Nervous System Energy Release Reduces Tiredness and Fatigue - Vegan - 120 Count

Solgar£12.674.5★12,620 rev

Magnesium Citrate Capsules 1480mg - 240 Capsules - 4 Months Supply

WeightWorld£12.254.5★12,196 rev

Magnesium Glycinate 3-in-1 Complex - 1800mg Supplements as Bisglycinate Citrate & Malate 90 Vegan Capsules Triple High Absorption 384mg Elemental UK Made

Nutrition Geeks£8.114.5★35,795 rev

PH PROWISE Healthcare£7.794.5★200 rev

Magnesium Citrate 1 480mg 120 Vegan Capsules 2 Months Supply - Providing 440mg Elemental Magnesium Per Serving - Magnesium Capsules not Magnesium Tablets - High Strength Magnesium Supplement GMO Free

Multivita£6.714.6★292 rev

Newest

by launch date

Solgar Magnesium Glycinate - Pack of 60 Capsules - Highly bioavailable Form of Magnesium Designed for Optimal Absorption and Gentle Support

Solgar£8.8129 rev

4mo ago

Hybrid Health Magnesium Citrate 1500mg Supplement - 360 Vegan Capsules High-Strength Formula Independently 3rd Party Lab Tested 6 Months Supply

Hybrid Health£13.073 rev

8mo ago

PH PROWISE Healthcare£7.79200 rev

10mo ago

Magnesium Citrate 1 480mg 120 Vegan Capsules 2 Months Supply - Providing 440mg Elemental Magnesium Per Serving - Magnesium Capsules not Magnesium Tablets - High Strength Magnesium Supplement GMO Free

Multivita£6.71292 rev

2y ago

Magnesium Citrate 600mg 180mg Elemental Magnesium 90 Vegan Capsules Daily Supplement Made in Britain SMUG Supplements

SMUG Supplements£4.01175 rev

2y ago

What buyers say about magnesium citrate

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

What buyers love

Sleep Quality24%

“HELPS WITH SLEEP”

Quality-Overall15%

“have always found them to be consistent in quality”

Magnesium11%

“Best magnesium capsules”

Value For Money10%

“Excellent value for money”

Advertised Vs Actual Product5%

“As Advertised”

Muscle Pain Relief4%

“helps muscle cramps”

Ease Of Chewing/Swallowing3%

“ease of swallowing”

Efficiency3%

“Very good does the job”

Vitamin3%

“Vitamins that work”

Ease Of Use2%

“Easy to use”

What buyers complain about

Sleep Quality14%

“Not helping with sleep”

Functionality-Overall9%

“It does absolutely nothing”

Magnesium8%

“This magnesium does not work”

Acid Regulator/Stomach Ache Relief6%

“Gives you stomach cramps”

Size-Overall6%

“Tablets are so large”

Dosage6%

“The dosage is far too high”

Side Effects5%

“Will make you ill”

Value For Money3%

“Expensive”

Quality-Overall3%

“Absolutely rubbish”

Advertised Vs Actual Product3%

“Misleading Product”

Top return reasons

Magnesium50%

Joint Pain50%

Common questions

Is magnesium citrate profitable to sell on Amazon United Kingdom?: The niche generates £534K/yr across 23 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -17.0%. Flapen's verdict: Worth a look (52/100).
How competitive is the magnesium citrate niche?: 18 brands and 64 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 62% of demand.
What do buyers complain about in magnesium citrate?: Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Magnesium. The return rate is 0.1%.
When does demand for magnesium citrate peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the magnesium citrate niche?: Listings span £4.01–£17.01; the average listing price is £9.52 (sweet spot $15–$100). The average incumbent carries 4,974 reviews — the moat a new listing must climb.