potassium 99 mg
Skip itA concentrated shelf (top 5 take 88% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible24.2%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Okay$11.67avg listing price — sweet spot $15–$100
Price range
Okay$5.33–$19.77cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+3.6%90-day search growth — must beat 0% to launch
Review moat
Bad7,182.88avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$56K$56K/yr · 20K searches
Brand share
Bad95%top-5 brand share — brand-locked demand
Competition
Bad88%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, potassium 99 mg is a $56K/yr Amazon United States market (20K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Nov. Verdict: Skip it — 36/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
potassium 99 mg market data
- Units sold / yr
- 5K–6K
- avg 500–750/product
- Revenue / yr
- $58K–$70K
- units × avg price
- Conversion rate
- 24.2%
- Avg BSR
- #61
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 0.0%
- Avg brand age
- 95 months
- Avg seller age
- 153 days
Competition & brand share
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 rising
Sellers
77
Top-5 brand share
95%
Top 20: 100%
Top-5 click share
88%
Top 20: 100%
Open market
3%
- Nature's Bounty59%
- ikj12%
- Amazon Basics11%
- Nutricost7%
- Vitamin World7%
- NOW Foods3%
- Open — no brand owns it (1 brand, 3%)
Demand & seasonality
Weekly Amazon search volume, last 54 weeks — +3.6% search growth over the last 90 days.Peak months: Nov · busiest ÷ quietest = 1.9×
Top potassium 99 mg search terms
- potassium 99 mg9K/yr
- potassium 99mg4K/yr
- natures bounty potassium4K/yr
- potassium supplement 99mg3K/yr
Top potassium 99 mg 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 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Natures Bounty Potassium 99mg Supports Fluid Balance and Muscle Activity Involved in Normal Heart Function Potassium Gluconate Dietary Supplement Gluten Free 1 Per Day 100 Vegetarian Caplets
Nature's Bounty$5.334.8★5,626 rev
ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count
ikj$17.634.7★486 rev
Amazon Basics Potassium Heart Health Capsules 99 mg 250 Count
Amazon Basics$10.534.8★247 rev
Natures Bounty Potassium Gluconate 99mg 100 Caplets
Nature's Bounty$7.354.7★10,152 rev
Nutricost Potassium Citrate 99mg 500 Capsules
Nutricost$19.774.7★14,955 rev
Newest
by launch dateAmazon Basics Potassium Heart Health Capsules 99 mg 250 Count
Amazon Basics$10.53247 rev
ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count
ikj$17.63486 rev
Vitamin World Potassium 99 mg - 250 Vegetarian Caplets Potassium Gluconate Supplement for Electrolyte & Muscle & Nerve & Heart Support Gluten-Free Once Daily 250 Days Supply
Vitamin World$9.90109 rev
Nutricost Potassium Citrate 99mg 500 Capsules
Nutricost$19.7714,955 rev
Natures Bounty Potassium 99mg Supports Fluid Balance and Muscle Activity Involved in Normal Heart Function Potassium Gluconate Dietary Supplement Gluten Free 1 Per Day 100 Vegetarian Caplets
Nature's Bounty$5.335,626 rev
Trending
90-day click momentumVitamin World Potassium 99 mg - 250 Vegetarian Caplets Potassium Gluconate Supplement for Electrolyte & Muscle & Nerve & Heart Support Gluten-Free Once Daily 250 Days Supply
Vitamin World$9.904.7★
Amazon Basics Potassium Heart Health Capsules 99 mg 250 Count
Amazon Basics$10.534.8★
Natures Bounty Potassium Gluconate 99mg 100 Caplets
Nature's Bounty$7.354.7★
SOLARAY Potassium 99 mg 200 VegCaps
SOLARAY$14.314.7★
ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count
ikj$17.634.7★
What buyers say about potassium 99 mg
What buyers praise and complain about, mined from review topics.What buyers love
“Ease of logistics and quality product”
“Good value for the money”
“Helps to maintain potassium levels”
“As described”
“Good purchase works as well as big label vitamins”
“it's more effective than tablets”
“can be swallowed with ease”
“Good basic supplement”
“It's jus the right dosage”
“Good Ease for use”
What buyers complain about
“TOO LOW A DOSEAGE PER CAPSULE”
“Potassium tablets which have less than 2 percent potassium of your daily minimum”
“My doctor freaked out that I was taking this because too much potassium can stop your heart”
“The capsules are small”
“It seems like it's getting harder to find lower dose supplements for some reason”
“Doesn't work for me”
“If you have trouble swallowing large pills this is not the tablet for you”
“Not useful”
“Did not work for muscle cramps”
“I have a corn allergy”
Top return reasons
Common questions
- Is potassium 99 mg profitable to sell on Amazon United States?
- The niche generates $56K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +3.6%. Flapen's verdict: Skip it (36/100).
- How competitive is the potassium 99 mg niche?
- 7 brands and 77 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 95% of demand.
- What do buyers complain about in potassium 99 mg?
- Top complaints mined from reviews: Dosage, Calcium, Heart Health. The return rate is 0.0%.
- When does demand for potassium 99 mg peak?
- Demand peaks in Nov; the busiest month runs 1.9× the quietest.
- What does it cost to enter the potassium 99 mg niche?
- Listings span $5.33–$19.77; the average listing price is $11.67 (sweet spot $15–$100). The average incumbent carries 7,183 reviews — the moat a new listing must climb.