magnesium glycinate 200mg
Skip itSoft demand (-41.6% this quarter) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great10.0%search→purchase rate — share of searches ending in a sale
Brand share
Good75%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Okay£9.84avg listing price — sweet spot $15–$100
Competition
Okay66%top-5 click share — leaders hold, buyers still browse
Review moat
Okay3,628.7avg incumbent reviews — the moat a new listing must climb
Market size
Bad£63K£63K/yr · 65K searches
Price range
Bad£3.44–£16.79cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Bad-41.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, magnesium glycinate 200mg is a £63K/yr Amazon United Kingdom market (65K searches/yr). The top 5 brands hold 75% of demand. Verdict: Skip it — 39/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
magnesium glycinate 200mg market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- £59K–£79K
- units × avg price
- Conversion rate
- 10.0%
- Avg BSR
- #106
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 96%
- Out of stock
- 4.3%
- Avg brand age
- 39 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.Brands
18 falling
Sellers
52
Top-5 brand share
75%
Top 20: 100%
Top-5 click share
66%
Top 20: 97%
Open market
22%
- Nutravita30%
- iperk20%
- Health Thru Nutrition13%
- Nutrition Geeks8%
- My Supplement Farm3%
- WeightWorld3%
Demand
Weekly Amazon search volume, last 46 weeks — -41.6% search growth over the last 90 days.Top magnesium glycinate 200mg search terms
- magnesium glycinate 200mg31K/yr
- magnesium glycinate 300mg15K/yr
- nutravita magnesium glycinate5K/yr
- magnesium glycinate 250mg4K/yr
- magnesium 300mg6K/yr
- nutravita magnesium5K/yr
Top magnesium glycinate 200mg 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 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nutravita Magnesium Glycinate - 120 Vegan Capsules - 200mg Elemental Mag 90mg Bisglycinate & 110mg Oxide - High Strength Magnesium Complex for Men & Women - Tablets & Powder Supplements Alternative
Nutravita£6.434.2★39 rev
Magnesium Glycinate Capsules Provide 300 mg of Pure Elemental Magnesium Per Serving 120 Vegan Caps | Magnesium Supplement Non GMO Dairy & Gluten Free
iperk£8.414.4★1,505 rev
Magnesium Glycinate 200mg from 1 540mg Fully Reacted Chelated Magnesium Bisglycinate | High Absorption | Relaxation & Nerve Function Supplement | Non-GMO 120 Coated Tablets | by Health Thru Nutrition
Health Thru Nutrition£8.314.5★648 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
Nutravita Magnesium Supplements 5-in-1 Complex 1146mg - Which? Best Buy 2025-240 Magnesium Complex Capsules - 400mg Elemental - Bisglycinate Citrate Malate Oxide - Muscles & Sleep Supplement
Nutravita£14.764.6★1,125 rev
Newest
by launch dateNutravita Magnesium Glycinate - 120 Vegan Capsules - 200mg Elemental Mag 90mg Bisglycinate & 110mg Oxide - High Strength Magnesium Complex for Men & Women - Tablets & Powder Supplements Alternative
Nutravita£6.4339 rev
Magnesium Glycinate | Vitamin B6 | 200mg - 120 Capsules & 2 Month Supply | Chelated Absorption | Support Energy Metabolism | Made in UK | Non GMO | Vegan | Gluten Free
My Supplement Farm£10.8718 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
Magnesium Glycinate 200mg from 1 540mg Fully Reacted Chelated Magnesium Bisglycinate | High Absorption | Relaxation & Nerve Function Supplement | Non-GMO 120 Coated Tablets | by Health Thru Nutrition
Health Thru Nutrition£8.31648 rev
Trending
90-day click momentumNutravita Magnesium Glycinate - 120 Vegan Capsules - 200mg Elemental Mag 90mg Bisglycinate & 110mg Oxide - High Strength Magnesium Complex for Men & Women - Tablets & Powder Supplements Alternative
Nutravita£6.434.2★
INNOPURE Magnesium Glycinate (Bisglycinate) 200mg Elemental per Serving Gentle & Bioavailable 90 Vegan Capsules Made in the UK
INNOPURE£10.404.4★
Magnesium Glycinate Supplements - Pure Active Ingredient - 120 High Strength Vegan Capsules Providing 208mg Elemental Per Serving - UK Manufactured By New Leaf Products 1040mg of Magnesium
NEW LEAF PRODUCTS£7.864.6★
Magnesium Supplements Tablets
Vitabiotics Ultra£3.444.6★
Daily Magnesium Glycinate 1500mg | Provides 300mg of Pure Elemental Magnesium | Fatigue Mood and Muscle Recovery | 60 Vegan Capsules | Two-A-Day
dr vegan£10.694.6★
What buyers say about magnesium glycinate 200mg
What buyers praise and complain about, mined from review topics.What buyers love
“Does help sleep”
“the quality is always consistent”
“Best magnesium supplement around”
“Good value for money”
“accurate description”
“Improved my muscle spasms greatly”
“Important vitamins”
“Effective”
“I have had no issues swallowing them”
“Easy to use”
What buyers complain about
“unable to sleep”
“This magnesium does not work”
“It does absolutely nothing”
“Too big”
“Caused severe stomach cramps”
“The dose is misleading”
“No side effects didn't work”
“There is no reason for this sort of quality control failure unless I am misunderstanding the process”
“Quite big to swallow”
“Misleading information about the product”
Top return reasons
Common questions
- Is magnesium glycinate 200mg profitable to sell on Amazon United Kingdom?
- The niche generates £63K/yr across 23 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -41.6%. Flapen's verdict: Skip it (39/100).
- How competitive is the magnesium glycinate 200mg niche?
- 18 brands and 52 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 75% of demand.
- What do buyers complain about in magnesium glycinate 200mg?
- Top complaints mined from reviews: Sleep Quality, Magnesium, Functionality-Overall. The return rate is 0.1%.
- What does it cost to enter the magnesium glycinate 200mg niche?
- Listings span £3.44–£16.79; the average listing price is £9.84 (sweet spot $15–$100). The average incumbent carries 3,629 reviews — the moat a new listing must climb.