Magnesium Glycinate 400mg
Launch itA $5.2M/yr market growing +10.3% this quarter with returns at 0.0% — clears our launch bar.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Market size
Incredible$5.2M$5.2M/yr · 2.3M searches
Conversion
Incredible12.2%search→purchase rate — share of searches ending in a sale
Avg price
Great$18.52avg listing price — sweet spot $15–$100
Price range
Great$9.79–$45.01cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good69%top-5 brand share — brands hold most of the demand
Competition
Okay61%top-5 click share — leaders hold, buyers still browse
Growth
Okay+10.3%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad15,020.44avg incumbent reviews — the moat a new listing must climb
Is magnesium glycinate 400mg profitable on Amazon?
According to Flapen's Amazon United States niche tracking, magnesium glycinate 400mg is a $5.2M/yr Amazon United States market (2.3M searches/yr). The top 5 brands hold 69% of demand. Demand peaks in May. Verdict: Launch it — 63/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
magnesium glycinate 400mg market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 250K–300K
- avg 15,000–20,000/product
- Revenue / yr
- $4.6M–$5.6M
- units × avg price
- Conversion rate
- 12.2%
- Avg BSR
- #95
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 0.0%
- Avg brand age
- 47 months
- Avg seller age
- 151 days
Competition: brands, sellers & click share
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.Brands
15 rising
Sellers
87
Top-5 brand share
69%
Top 20: 100%
Top-5 click share
61%
Top 20: 100%
Open market
26%
- Double Wood Supplements33%
- Pure Encapsulations17%
- Nature Made8%
- Simpli Supplements6%
- I LOVE HEALTH5%
- Nobi Nutrition5%
magnesium glycinate 400mg demand & seasonality
Weekly Amazon search volume, last 104 weeks — +10.3% search growth over the last 90 days.Peak months: May · busiest ÷ quietest = 2.5×
Top magnesium glycinate 400mg search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- magnesium glycinate 400mg1.9M/yr
- magnesium glycinate 400 mg87K/yr
- magnesium bisglycinate 400mg33K/yr
- magnesium glycinate tablets48K/yr
- magnesium glycinate 40036K/yr
- glicinato de magnesio 400mg45K/yr
- double wood magnesium glycinate36K/yr
- 400 mg magnesium glycinate29K/yr
- magnesium glycinate small pills29K/yr
- bisglicinato de magnesio 400mg20K/yr
Top magnesium glycinate 400mg products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Magnesium Glycinate 400mg | 180 Capsules | Sleep Muscle & Heart Support | Vegan Third Party Tested Gluten Free Non-GMO by Double Wood Supplements
Double Wood Supplements$15.834.7★24,182 rev
Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 90 Capsules
Pure Encapsulations$26.104.7★49,969 rev
Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 180 Capsules
Pure Encapsulations$45.014.7★49,969 rev
Magnesium Glycinate 400mg per Serving High Absorption Gentle on Stomach Supports Sleep Relaxation Muscle Bone & Immune Health Non-GMO Vegan 180 Capsules
Simpli Supplements$10.114.7★1,213 rev
Magnesium Glycinate 400mg per Capsule 240 Capsules High Absorption Magnesium Supplement for Relaxation Calmness & Muscle Support Gentle on Stomach - for Men and Women Made in USA
I LOVE HEALTH$19.404.5★158 rev
Newest
by launch dateMagnesium Glycinate 400mg per Capsule 240 Capsules High Absorption Magnesium Supplement for Relaxation Calmness & Muscle Support Gentle on Stomach - for Men and Women Made in USA
I LOVE HEALTH$19.40158 rev
Magnesium Glycinate Gummies 400mg High Absorption Magnesium Supplement for Women Men and Kids Muscle Support and Relaxation Sugar Free Vegan 60 Days Supply
PURA WEX NUTRITION$18.011,357 rev
THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings
THORNE$25.392,847 rev
Natures Bounty High Absorption Magnesium Glycinate 240 mg for Supporting Muscle Relaxation and Bone Heart & Nerve Health Non-GMO Gluten-Free Vegetarian 120 Count/60 Servings
Nature's Bounty$15.655,675 rev
Magnesium Glycinate 400mg High Absorption Capsules with Quercetin | Quality Sleep Relaxation & Muscle Health Supplement for Women and Men | Chelated Magnesium 120 Count (Pack of 1) | Easy to Swallow
Sandhu's$22.092,848 rev
Trending
90-day click momentumMagnesium Glycinate 400mg per Capsule 240 Capsules High Absorption Magnesium Supplement for Relaxation Calmness & Muscle Support Gentle on Stomach - for Men and Women Made in USA
I LOVE HEALTH$19.404.5★
Nature Made Magnesium Oxide Extra Strength 400 mg 60 Softgels
Nature Made$10.074.7★
Nutricost Magnesium Glycinate Capsules 180 Capsules 210mg
Nutricost$15.434.7★
Qunol Magnesium 420mg Extra Strength High Absorption Vegetarian 180ct
Qunol$16.144.7★
Natures Bounty High Absorption Magnesium Glycinate 240 mg for Supporting Muscle Relaxation and Bone Heart & Nerve Health Non-GMO Gluten-Free Vegetarian 120 Count/60 Servings
Nature's Bounty$15.654.7★
What reviews say buyers love and hate about magnesium glycinate 400mg
What buyers praise and complain about, mined from review topics.What buyers love
“Great for sleeping”
“the quality has been very consistent”
“Great Magnesium Gummies”
“They are affordable”
“arrived as described”
“Best Vitamins”
“muscle recovery”
“Effective”
“Love chewables”
“Taste is very pleasing”
What buyers complain about
“Low dose of actual magnesium”
“Did not help with sleep”
“Dosage too high”
“No results”
“They are HUGE”
“False advertisement”
“Poor quality control”
“Made me sick”
“Stomach pain”
“A little pricey”
Top return reasons
Common magnesium glycinate 400mg questions
- Is magnesium glycinate 400mg profitable to sell on Amazon United States?
- The niche generates $5.2M/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +10.3%. Flapen's verdict: Launch it (63/100).
- How competitive is the magnesium glycinate 400mg niche?
- 15 brands and 87 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 69% of demand.
- What do buyers complain about in magnesium glycinate 400mg?
- Top complaints mined from reviews: Magnesium, Sleep Quality, Dosage. The return rate is 0.0%.
- When does demand for magnesium glycinate 400mg peak?
- Demand peaks in May; the busiest month runs 2.5× the quietest.
- What does it cost to enter the magnesium glycinate 400mg niche?
- Listings span $9.79–$45.01; the average listing price is $18.52 (sweet spot $15–$100). The average incumbent carries 15,020 reviews — the moat a new listing must climb.