Magnesium Glycinate 300mg
Worth a lookShows low returns (0.0%), but soft demand (-9.5% this quarter) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Incredible$25.84avg listing price — sweet spot $15–$100
Price range
Great$9.82–$83.43cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great9.5%search→purchase rate — share of searches ending in a sale
Market size
Good$628K$628K/yr · 256K searches
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Growth
Bad-9.5%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad13,020.35avg incumbent reviews — the moat a new listing must climb
Is magnesium glycinate 300mg profitable on Amazon?
According to Flapen's Amazon United States niche tracking, magnesium glycinate 300mg is a $628K/yr Amazon United States market (256K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Jul. Verdict: Worth a look — 52/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
magnesium glycinate 300mg market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 25K–30K
- avg 1,250–1,500/product
- Revenue / yr
- $646K–$775K
- units × avg price
- Conversion rate
- 9.5%
- Avg BSR
- #146
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 5.3%
- Avg brand age
- 51 months
- Avg seller age
- 155 days
Competition: brands, sellers & click share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
574
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
17%
- tnvitamins22%
- Pure Encapsulations19%
- Qunol17%
- Nature Made15%
- Nature's Bounty6%
- THORNE4%
- Open — no brand owns it (8 brands, 17%)
magnesium glycinate 300mg demand & seasonality
Weekly Amazon search volume, last 104 weeks — -9.5% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 1.9×
Top magnesium glycinate 300mg search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- magnesium glycinate 300mg174K/yr
- magnesium glycinate 300 mg32K/yr
- magnesium glycinate 30012K/yr
- magnesium glycinate 300 mg for women10K/yr
- magnesium glycinate 320 mg for women13K/yr
- magnesium glycinate 320 mg15K/yr
Top magnesium glycinate 300mg 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 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
tnvitamins Magnesium Glycinate 300mg 90 Capsules | High Absorption Chelated Magnesium for Sleep Calm & Muscle Support* | Non-GMO Gentle Non-Laxative | TNVitamins
tnvitamins$9.824.7★3,749 rev
Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules
Nature Made$21.134.7★2,683 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
Qunol Magnesium Glycinate Tablets 300mg 100% Chelated Gluten-Free 90ct
Qunol$18.064.6★6,509 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$15.654.7★5,675 rev
Newest
by launch date
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
Micro Ingredients Magnesium Glycinate 350mg Per Serving 240 Veggie Capsules | Potent Elemental Form 100% Chelated Highly Bioavailable | Healthy Muscle Bones & Mood Support Supplement | Non-GMO
Micro Ingredients$17.98332 rev
Qunol Magnesium Glycinate Tablets 300mg 100% Chelated Gluten-Free 150ct
Qunol$28.246,509 rev
Life Extension Magnesium Glycinate Heart Health Bone Health Nerve and Muscle Support Highly absorbable Gluten-Free Non-GMO Vegetarian 90 Capsules
Life Extension$16.642,110 rev
Trending
90-day click momentum
Designs for Health Magnesium Glycinate Complex - High Absorption Patented Magnesium Complex - Promotes Calm Sleep Energy Bone & Heart Health and Immune Support - Vegan Gluten Free (120 Capsules)
Designs for Health$33.964.6★
Pure Encapsulations Magnesium (Glycinate) - Supplement to Support Stress Relief Sleep Heart Health Nerves Muscles and Metabolism* - with Magnesium Glycinate - 360 Capsules
Pure Encapsulations$83.434.7★
Now Foods Magnesium Glycinate 240 Tablets - Supports Healthy Muscle and Nerve Functions - Non-GMO
NOW Foods$28.864.8★
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★
Nature Made Magnesium Glycinate 300 mg per 3 Capsules 90 Capsules
Nature Made$21.134.7★
What reviews say buyers love and hate about magnesium glycinate 300mg
What buyers praise and complain about, mined from review topics.What buyers love
“Deep sleep”
“Amazing quality”
“Best magnesium supplement”
“They are affordable”
“arrived as described”
“Very happy with the vitamins”
“Eases muscle cramping”
“Works ok”
“Helps with anxiety and stress”
“Easier to swallow”
What buyers complain about
“Cant sleep”
“Too much magnesium”
“Dosage too high”
“Very large pills”
“NO quality control”
“noticed no results”
“Bad Side effects”
“Stomach pain”
“A little pricey”
“VERY DIFFICULT TO SWALLOW”
Top return reasons
Common magnesium glycinate 300mg questions
- Is magnesium glycinate 300mg profitable to sell on Amazon United States?
- The niche generates $628K/yr across 17 tracked products. 90-day search growth is -9.5%. Flapen's verdict: Worth a look (52/100).
- How competitive is the magnesium glycinate 300mg niche?
- 14 brands and 574 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 79% of demand.
- What do buyers complain about in magnesium glycinate 300mg?
- Top complaints mined from reviews: Sleep Quality, Magnesium, Dosage. The return rate is 0.0%.
- When does demand for magnesium glycinate 300mg peak?
- Demand peaks in Jul; the busiest month runs 1.9× the quietest.
- What does it cost to enter the magnesium glycinate 300mg niche?
- Listings span $9.82–$83.43; the average listing price is $25.84 (sweet spot $15–$100). The average incumbent carries 13,020 reviews — the moat a new listing must climb.