Is magnesium complex profitable to sell on Amazon United Kingdom?

The niche generates £514K/yr across 18 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -7.3%. Flapen's verdict: Worth a look (54/100).

How competitive is the magnesium complex niche?

15 brands and 18 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 68% of demand.

What do buyers complain about in magnesium complex?

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

When does demand for magnesium complex peak?

Demand peaks in Aug–Sep; the busiest month runs 8.0× the quietest.

What does it cost to enter the magnesium complex niche?

Listings span £6.78–£28.86; the average listing price is £11.55 (sweet spot $15–$100). The average incumbent carries 3,629 reviews — the moat a new listing must climb.

magnesium complex

Worth a look

Shows low returns (0.1%), but soft demand (-7.3% this quarter) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great9.7%

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

Price range

Good£6.78–£28.86

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

Brand share

Good68%

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

Market size

Good£514K

£514K/yr · 459K searches

Avg price

Okay£11.55

avg listing price — sweet spot $15–$100

Competition

Okay58%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Okay3,629.22

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-7.3%

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

Signals No Dominant Brand

According to Flapen's Amazon United Kingdom niche tracking, magnesium complex is a £514K/yr Amazon United Kingdom market (459K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Aug–Sep. Verdict: Worth a look — 54/100.

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

magnesium complex market data

Units sold / yr: 40K–50K; avg 3,000–4,000/product
Revenue / yr: £462K–£578K; units × avg price
Conversion rate: 9.7%
Avg BSR: #154
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 3.1%
Avg brand age: 38 months
Avg seller age: 172 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

58%

Top 20: 100%

Open market

24%

NEW LEAF PRODUCTS19%
HealthEssent18%
PH PROWISE Healthcare12%
Nutrition Geeks10%
Free Soul9%
WeightWorld9%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -7.3% search growth over the last 90 days.

Peak months: Aug, Sep · busiest ÷ quietest = 8.0×

Open Trend

Top magnesium complex search terms

magnesium complex275K/yr -0.9%7.7% conv.
magnesium complex 12 in 123K/yr +55.4%4.0% conv.
magnesium 4 in 118K/yr -2.0%14.4% conv.
new leaf magnesium glycinate15K/yr -18.6%15.9% conv.
new leaf products18K/yr -15.8%1.0% conv.
free soul magnesium 4-in-119K/yr -32.5%18.7% conv.
new leaf10K/yr -28.2%0.8% conv.
magnesium orotate9K/yr +7.9%0.7% conv.
prowise advanced 4 in 1 magnesium complex2K/yr +72.1%18.9% conv.
magnesium complex 4 in 111K/yr -27.2%9.5% conv.

All search terms

Top magnesium complex 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 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Magnesium 6-in-1 Complex 2325mg with Magnesium Glycinate Citrate Malate Oxide Taurate and Orotate - Muscle Nerve & Energy Support - High Absorption 390mg Elemental - 120 Capsules by HealthEssent

HealthEssent£8.284.6★1,067 rev

Magnesium Glycinate Complex 4 in 1-1866mg per Serving | Precise 404mg Elemental Magnesium dose | Added Magnesium Glycinate Citrate Malate & Taurate | 90 Vegan Capsules - by Prowise

PH PROWISE Healthcare£7.684.3★2,606 rev

Magnesium Glycinate 4-in-1 Complex 1836mg 381mg Elemental Per Serving High-Strength Magnesium with Bisglycinate Citrate Malate Oxide 120 Vegan Capsules UK Manufactured by New Leaf

NEW LEAF PRODUCTS£10.944.6★4,528 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

Free Soul£7.244.4★3,230 rev

Newest

by launch date

Magnesium Complex 12-in-1 700mg per Serving with Glycinate Citrate Malate Oxide Taurate Aspartate Orotate - High Absorption - Sleep Muscle Support Energy Nerve & Heart Health - 90 Capsules

Bound Nutrition£15.1718 rev

4mo ago

OMNIA High Strength Magnesium Complex 8-in-1 Magnesium Glycinate Citrate Malate & Oxide with L-Theanine Vitamin D3 B6 & Black Pepper -120 Vegan Capsules

OMNIA£7.6694 rev

7mo ago

PH PROWISE Healthcare£7.97147 rev

9mo ago

Magnesium Complex 400mg - 5 Forms of Magnesium (Bisglycinate Citrate Oxide Carbonate Liposomal) + Vitamin B6 - High Absorption - Energy Muscles Fatigue Nervous System - 180 Capsules vitavea

Vitavea£10.3966 rev

10mo ago

Magnesium Glycinate Supplements Magnesium glycinate 25-in-1 Supplement with Glycinate Citrate Malate Oxide Taurate Aspartate Orotate Magnesium Relaxation Muscle Heart Support 120 Capsules

AuranC-H£20.0033 rev

10mo ago

What buyers say about magnesium complex

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

What buyers love

Sleep Quality25%

“sleep more deeply”

Quality-Overall16%

“Good quality tablets”

Magnesium11%

“best magnesium”

Value For Money10%

“EXCELLENT VALUE FOR MONEY”

Advertised Vs Actual Product5%

“accurate description”

Muscle Pain Relief4%

“whilst this helps with stiff muscles”

Vitamin3%

“Fantastic vitamins”

Efficiency3%

“Keeps on working”

Ease Of Chewing/Swallowing3%

“Easy to chew and tasty”

Ease Of Use2%

“Ease of Use”

What buyers complain about

Sleep Quality13%

“Not helping with sleep at all”

Magnesium9%

“This magnesium does not work”

Functionality-Overall6%

“It does absolutely nothing”

Size-Overall6%

“they are rather large tablets”

Dosage6%

“The dosage is far too high”

Ease Of Chewing/Swallowing5%

“painful to swallow”

Acid Regulator/Stomach Ache Relief5%

“Gives you stomach cramps”

Side Effects4%

“only negative effects”

Value For Money3%

“Too expensive”

Taste-Overall2%

“Strange taste”

Top return reasons

Joint Pain50%

Magnesium50%

Common questions

Is magnesium complex profitable to sell on Amazon United Kingdom?: The niche generates £514K/yr across 18 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -7.3%. Flapen's verdict: Worth a look (54/100).
How competitive is the magnesium complex niche?: 15 brands and 18 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 68% of demand.
What do buyers complain about in magnesium complex?: Top complaints mined from reviews: Sleep Quality, Magnesium, Functionality-Overall. The return rate is 0.1%.
When does demand for magnesium complex peak?: Demand peaks in Aug–Sep; the busiest month runs 8.0× the quietest.
What does it cost to enter the magnesium complex niche?: Listings span £6.78–£28.86; the average listing price is £11.55 (sweet spot $15–$100). The average incumbent carries 3,629 reviews — the moat a new listing must climb.