calcium magnesium
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great8.4%search→purchase rate — share of searches ending in a sale
Price range
Good£4.17–£42.01cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£13.42avg listing price — sweet spot $15–$100
Competition
Good53%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Okay£118K£118K/yr · 105K searches
Review moat
Bad4,888.96avg incumbent reviews — the moat a new listing must climb
Growth
Bad-18.9%90-day search growth — must beat 0% to launch
Brand share
Bad95%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, calcium magnesium is a £118K/yr Amazon United Kingdom market (105K searches/yr). The top 5 brands hold 95% of demand. Verdict: Skip it — 45/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
calcium magnesium market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £81K–£107K
- units × avg price
- Conversion rate
- 8.4%
- Avg BSR
- #140
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 75%
- Out of stock
- 1.9%
- Avg brand age
- 53 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.Brands
7 falling
Sellers
66
Top-5 brand share
95%
Top 20: 98%
Top-5 click share
53%
Top 20: 94%
Open market
3%
- Solgar76%
- Sanofi9%
- Vitamin Store4%
- Nutrition Geeks3%
- SS Sport Supplies2%
- --2%
- Open — no brand owns it (1 brand, 3%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -18.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top calcium magnesium search terms
- solgar64K/yr
- magnesium b612K/yr
- magnesium and vitamin b68K/yr
- magne b67K/yr
- solgar vitamins3K/yr
- magnesium and b64K/yr
- magnesium with vitamin b63K/yr
- magne b6 forte3K/yr
Top calcium 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Solgar Magnesium with Vitamin B6 - Supports Energy Levels - Reduce Tiredness and Fatigue - Muscle Function - Vegan - 100 Tablets
Solgar£5.254.5★3,811 rev
Magne B6 N50 Tab - Relief for Nervousness Irritability Mild Anxiety Hypomagnesemia & Cramps
Sanofi£11.504.8★62 rev
Solgar Skin Nails and Hair Improved MSM Formula To Help Build Collagen With Vitamin C Vegan Light Brown Pack of 120 310 g
Solgar£14.454.4★8,116 rev
Solgar Male Multiple Tablets - Pack of 60 - Supports Metabolism and Reduces Fatigue - Immunity Health and Bone Heart - Vegan
Solgar£15.264.6★616 rev
Solgar Formula VM-2000 - Multivitamin - Rich in Antioxidants - For when under Stress or Lack of Energy - 60 Tablets
Solgar£14.344.6★2,581 rev
Newest
by launch date
Zinc Magnesium and Vitamin B6 Tablets Supplements for Men & Women Pack of 180 Tablets (6 Months Supply) High Strength Sleep Aid Muscle Recovery Better Sleep UK
Red Label Health£4.17419 rev
Zipvit Magnesium Glycinate 2000mg with 400mg Elemental Plus Vitamin B6 120 Vegan Tablets High Strength Magnesium Supplements
Zipvit£7.912,240 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£8.1135,795 rev
Magnesium Glycinate Supplements 1500mg & Vitamin B6-120 High Strength Capsules - 1500mg of Magnesium Providing 315mg Elemental Magnesium (Bisglycinate) - Pure Active Ingredient
SS Sport Supplies£8.126,499 rev
Magne B6 N50 Tab - Relief for Nervousness Irritability Mild Anxiety Hypomagnesemia & Cramps
Sanofi£11.5062 rev
Trending
90-day click momentumSolgar Formula VM-2000 - Multivitamin - Rich in Antioxidants - For when under Stress or Lack of Energy - 60 Tablets
Solgar£14.344.6★
Solgar Male Multiple Tablets - Pack of 60 - Supports Metabolism and Reduces Fatigue - Immunity Health and Bone Heart - Vegan
Solgar£15.264.6★
Solgar Extra Strength Glucosamine Chondroitin MSM Tablets - Pack of 120 - Bone Joint and Cartilage Care - Shellfish Free - Gluten-Free
Solgar£42.014.3★
Solgar Collagen Hyaluronic Acid Complex - Reduces Fine Lines & Wrinkles - Skin Hydration - Vitamin C - 30 Tablets
Solgar£16.594.5★
Zipvit Magnesium Glycinate 2000mg with 400mg Elemental Plus Vitamin B6 120 Vegan Tablets High Strength Magnesium Supplements
Zipvit£7.914.6★
What buyers say about calcium magnesium
What buyers praise and complain about, mined from review topics.What buyers love
“Does help sleep”
“Excellent product”
“Fair price”
“Best magnesium out there”
“As Advertised”
“Really good vitamins”
“helps muscle cramps”
“Does the job”
“i've found no problem in swallowing them”
“Easy to use”
What buyers complain about
“unable to sleep”
“This magnesium does not work”
“Unfortunately doesnt work on me”
“Tablets are so large”
“Gives you stomach cramps”
“The dosage is far too high”
“Will make you ill”
“I usually struggle with swallowing tablets”
“It's not as described”
“Waste of money”
Top return reasons
Common questions
- Is calcium magnesium profitable to sell on Amazon United Kingdom?
- The niche generates £118K/yr across 24 tracked products. 90-day search growth is -18.9%. Flapen's verdict: Skip it (45/100).
- How competitive is the calcium magnesium niche?
- 7 brands and 66 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 95% of demand.
- What do buyers complain about in calcium magnesium?
- Top complaints mined from reviews: Sleep Quality, Magnesium, Functionality-Overall. The return rate is 0.1%.
- When does demand for calcium magnesium peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the calcium magnesium niche?
- Listings span £4.17–£42.01; the average listing price is £13.42 (sweet spot $15–$100). The average incumbent carries 4,889 reviews — the moat a new listing must climb.