---
title: "Potassium 99 Mg — $56K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/potassium-99-mg"
last_updated: "2026-08-09T22:09:50.844Z"
locale: en
meta:
description: "Niche score 36/100 · $56K/yr market · 20K searches/yr · $11.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · $56K/yr market · 20K searches/yr · $11.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Potassium 99 Mg — $56K/yr Amazon US Niche (2026) - Flapen"
---
# **potassium 99 mg**
**Skip it**
A concentrated shelf (top 5 take 88% of clicks) — this niche doesn't clear our bar today.
Market size 14Growth 29Conversion 100Competition 10Returns 100Price range 33Avg price 47Brand share 13Review moat 23Quality gap 17
**Conversion**
**Incredible****24.2%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Okay****$11.67**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****$5.33–$19.77**
cheapest 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**
**Bad****7,182.88**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$56K**
$56K/yr · 20K searches
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****88%**
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 ~~](https://flapen.com/research/methodology)
## **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.
600400Spike '25Spike '26 seasonAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Nov · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/health-household/potassium-99-mg/trend)
## **Top potassium 99 mg search terms**
- **potassium 99 mg**9K/yr+16.9%21.5% conv. - **potassium 99mg**4K/yr+9.5%17.2% conv. - **natures bounty potassium**4K/yr-27.7%23.9% conv. - **potassium supplement 99mg**3K/yr+5.2%16.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/potassium-99-mg/search-terms)
## **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.
0%15%$8K30%$17K45%$25K60%$33K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**$5.33**4.8★5,626 rev](https://www.amazon.com/dp/B0061GLE5W) [2**ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count**ikj**$17.63**4.7★486 rev](https://www.amazon.com/dp/B0C7MNJQH1) [3**Amazon Basics Potassium Heart Health Capsules 99 mg 250 Count**Amazon Basics**$10.53**4.8★247 rev](https://www.amazon.com/dp/B0FG7LS4QB) [4**Natures Bounty Potassium Gluconate 99mg 100 Caplets**Nature's Bounty**$7.35**4.7★10,152 rev](https://www.amazon.com/dp/B000GG86X6) [5**Nutricost Potassium Citrate 99mg 500 Capsules**Nutricost**$19.77**4.7★14,955 rev](https://www.amazon.com/dp/B01JN8WWQ4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Amazon Basics Potassium Heart Health Capsules 99 mg 250 Count**Amazon Basics**$10.53**247 rev7mo ago](https://www.amazon.com/dp/B0FG7LS4QB) [**ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count**ikj**$17.63**486 rev3y ago](https://www.amazon.com/dp/B0C7MNJQH1) [**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**$9.90**109 rev7y ago](https://www.amazon.com/dp/B07KV27MPN) [**Nutricost Potassium Citrate 99mg 500 Capsules**Nutricost**$19.77**14,955 rev9y ago](https://www.amazon.com/dp/B01JN8WWQ4) [**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**$5.33**5,626 rev16y ago](https://www.amazon.com/dp/B0061GLE5W)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$9.90**4.7★**▲ 84%**](https://www.amazon.com/dp/B07KV27MPN) [**Amazon Basics Potassium Heart Health Capsules 99 mg 250 Count**Amazon Basics**$10.53**4.8★**▲ 82%**](https://www.amazon.com/dp/B0FG7LS4QB) [**Natures Bounty Potassium Gluconate 99mg 100 Caplets**Nature's Bounty**$7.35**4.7★**▲ 33%**](https://www.amazon.com/dp/B000GG86X6) [**SOLARAY Potassium 99 mg 200 VegCaps**SOLARAY**$14.31**4.7★**— 9%**](https://www.amazon.com/dp/B0001VVDTU) [**ikj Potassium Caplets Dietary Supplement Value Size 99 Mg 500 Count**ikj**$17.63**4.7★**— 9%**](https://www.amazon.com/dp/B0C7MNJQH1)
**~~View all trending →~~**
## **What buyers say about potassium 99 mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“Ease of logistics and quality product”*
**Value For Money**17%
*“Good value for the money”*
**Calcium**9%
*“Helps to maintain potassium levels”*
**Advertised Vs Actual Product**9%
*“As described”*
**Vitamin**8%
*“Good purchase works as well as big label vitamins”*
**Efficiency**5%
*“it's more effective than tablets”*
**Ease Of Chewing/Swallowing**4%
*“can be swallowed with ease”*
**Nutritional Content**4%
*“Good basic supplement”*
**Dosage**3%
*“It's jus the right dosage”*
**Ease Of Use**3%
*“Good Ease for use”*
### **What buyers complain about **
**Dosage**16%
*“TOO LOW A DOSEAGE PER CAPSULE”*
**Calcium**7%
*“Potassium tablets which have less than 2 percent potassium of your daily minimum”*
**Heart Health**5%
*“My doctor freaked out that I was taking this because too much potassium can stop your heart”*
**Size-Overall**4%
*“The capsules are small”*
**Vitamin**4%
*“It seems like it's getting harder to find lower dose supplements for some reason”*
**Functionality-Overall**3%
*“Doesn't work for me”*
**Ease Of Chewing/Swallowing**3%
*“If you have trouble swallowing large pills this is not the tablet for you”*
**Ease Of Use**3%
*“Not useful”*
**Muscle Pain Relief**2%
*“Did not work for muscle cramps”*
**Allergies**2%
*“I have a corn allergy”*
### **Top return reasons **
**Calcium**25%
**Magnesium**25%
**Dosage**25%
**Certifications**25%
## **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.
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