magnesium glycinate powder
Skip itPrices mostly outside the sweet spot ($3.44–$15.37) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great10.4%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Good72%top-5 brand share — brands hold most of the demand
Market size
Okay£152K£152K/yr · 176K searches
Review moat
Bad4,634.79avg incumbent reviews — the moat a new listing must climb
Competition
Bad71%top-5 click share — a locked-up shelf
Avg price
Bad£8.31avg listing price — sweet spot $15–$100
Growth
Bad-41.5%90-day search growth — must beat 0% to launch
Price range
Bad£3.44–£15.37cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, magnesium glycinate powder is a £152K/yr Amazon United Kingdom market (176K searches/yr). The top 5 brands hold 72% of demand. Demand peaks in Jul–Oct. Verdict: Skip it — 42/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
magnesium glycinate powder market data
- Units sold / yr
- 15K–20K
- avg 1,000–1,250/product
- Revenue / yr
- £125K–£166K
- units × avg price
- Conversion rate
- 10.4%
- Avg BSR
- #60
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 86%
- Out of stock
- 0.0%
- Avg brand age
- 33 months
- Avg seller age
- 163 days
Competition & brand share
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.Brands
13 rising
Sellers
65
Top-5 brand share
72%
Top 20: 100%
Top-5 click share
71%
Top 20: 100%
Open market
22%
- Nutrition Geeks33%
- Wish Fusion14%
- PharmaZen10%
- Sleep Oracles8%
- BetterYou7%
- Natral6%
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — -41.5% search growth over the last 90 days.Peak months: Jul, Oct · busiest ÷ quietest = 5.7×
Top magnesium glycinate powder search terms
- magnesium for sleep58K/yr
- magnesium sleep48K/yr
- magnesium for sleep for adults22K/yr
- magnesium supplements for sleep19K/yr
- magnesium tablets for sleep9K/yr
- sleep magnesium8K/yr
- magnesium night time5K/yr
- magnesium sleep supplements5K/yr
- best magnesium for sleeping3K/yr
Top magnesium glycinate powder 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
Magnesium Glycinate 7 in 1-2400mg Magnesium Supplements to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Citrate Malate Taurate - 120 Capsules
Wish Fusion£6.564.6★1,134 rev
Magnesium Glycinate High Strength 1500mg - High Absorption Easy to Digest - UK Made Supplement for Sleep & Energy - Mag Bisglycinate with Vitamin B6 Tablets - 300mg Elemental Magnesium - 60 Capsules
PharmaZen£6.314.5★1,739 rev
Sleep Oracles Sleep Aid | 600mg Magnesium Glycinate with L-Theanine Passionflower & Valerian Root Relaxation & Sleep Support Blend | Vegan & Gluten Free Night-Time Supplement for Adults | 60 Capsules
Sleep Oracles£9.894.5★376 rev
Magnesium Glycinate 4-in-1 Complex High Absorption Magnesium for Sleep Muscle Function & Relaxation 60 Vegan Caspules with Malate Citrate & Oxide
Natral£5.204.6★208 rev
Newest
by launch dateSleep Oracles Sleep Aid | 600mg Magnesium Glycinate with L-Theanine Passionflower & Valerian Root Relaxation & Sleep Support Blend | Vegan & Gluten Free Night-Time Supplement for Adults | 60 Capsules
Sleep Oracles£9.89376 rev
Nootro Essentials Magnesium Glycinate Capsules with Vitamin B Complex for Sleep Calm & Muscle Support Vegan (60 Servings - 2 Capsules Daily 2 Month Supply)
Nootro Labs£10.60182 rev
Magnesium Glycinate High Strength 1500mg - High Absorption Easy to Digest - UK Made Supplement for Sleep & Energy - Mag Bisglycinate with Vitamin B6 Tablets - 300mg Elemental Magnesium - 60 Capsules
PharmaZen£6.311,739 rev
Healthspan Magnesium Glycinate 1500mg | Unwind at Bedtime | Reduces Tiredness & Fatigue | Maintains Normal Muscle & Psychological Function | Gentle on Your Stomach | Vegan (120 Tablets)
Healthspan£9.18201 rev
Magnesium Glycinate 7 in 1-2400mg Magnesium Supplements to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Citrate Malate Taurate - 120 Capsules
Wish Fusion£6.561,134 rev
Trending
90-day click momentumSleep Oracles Sleep Aid | 600mg Magnesium Glycinate with L-Theanine Passionflower & Valerian Root Relaxation & Sleep Support Blend | Vegan & Gluten Free Night-Time Supplement for Adults | 60 Capsules
Sleep Oracles£9.894.5★
Magnesium Glycinate 4-in-1 Complex High Absorption Magnesium for Sleep Muscle Function & Relaxation 60 Vegan Caspules with Malate Citrate & Oxide
Natral£5.204.6★
Healthspan Magnesium Glycinate 1500mg | Unwind at Bedtime | Reduces Tiredness & Fatigue | Maintains Normal Muscle & Psychological Function | Gentle on Your Stomach | Vegan (120 Tablets)
Healthspan£9.184.5★
Magnesium Supplements Tablets
Vitabiotics Ultra£3.444.6★
Nootro Essentials Magnesium Glycinate Capsules with Vitamin B Complex for Sleep Calm & Muscle Support Vegan (60 Servings - 2 Capsules Daily 2 Month Supply)
Nootro Labs£10.604.4★
What buyers say about magnesium glycinate powder
What buyers praise and complain about, mined from review topics.What buyers love
“HELPS WITH SLEEP”
“the quality is always consistent”
“Excellent value for money”
“Best Magnesium Supplement”
“As Advertised”
“Improved my muscle spasms greatly”
“Effective: They do exactly what I bought them for”
“Vitamins, easy to swallow good amount of supply”
“i've found no problem in swallowing them”
“Easy to use”
What buyers complain about
“No sleep”
“Did not work”
“It is not your ordinary magnesium”
“The dosage is far too high”
“Gives you stomach cramps”
“Big size”
“However, I have had some uncomfortable side effects:”
“Allergic reaction”
“not as good as expected”
“Expensive”
Top return reasons
Common questions
- Is magnesium glycinate powder profitable to sell on Amazon United Kingdom?
- The niche generates £152K/yr across 14 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -41.5%. Flapen's verdict: Skip it (42/100).
- How competitive is the magnesium glycinate powder niche?
- 13 brands and 65 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 72% of demand.
- What do buyers complain about in magnesium glycinate powder?
- Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Magnesium. The return rate is 0.1%.
- When does demand for magnesium glycinate powder peak?
- Demand peaks in Jul–Oct; the busiest month runs 5.7× the quietest.
- What does it cost to enter the magnesium glycinate powder niche?
- Listings span £3.44–£15.37; the average listing price is £8.31 (sweet spot $15–$100). The average incumbent carries 4,635 reviews — the moat a new listing must climb.