---
title: "Lysine 500mg Capsules — $36K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/lysine-500mg-capsules"
last_updated: "2026-08-12T14:15:11.737Z"
locale: en
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description: "Amazon product research for lysine 500mg capsules: $36K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for lysine 500mg capsules: $36K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Lysine 500mg Capsules — $36K/mo Amazon US Product Research"
---
# **Lysine 500mg Capsules**
**Worth a look**
Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Market size 57Growth 35Conversion 99Competition 24Returns 100Price range 73Avg price 77Brand share 31Review moat 32Quality gap 21
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****18.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$15.62**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$5.75–$39.41**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$433K**
$433K/yr · 152K searches
**Growth**
**Okay****+7.6%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****3,339.8**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****86%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
## **Is lysine 500mg capsules profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, lysine 500mg capsules is a $433K/yr Amazon United States market (152K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in Jan–Dec. Verdict: Worth a look — 51/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **lysine 500mg capsules market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **25K–30K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$391K–$469K**
- units × avg price
- **Conversion rate**
- **18.3%**
- **Avg BSR**
- **#161**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **53%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **92 months**
- **Avg seller age**
- **173 days**
## **Competition: brands, sellers & click share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▲rising
**Sellers**
**574**
**Top-5 brand share**
**86%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**11%**
- NOW Foods41% - Pure Encapsulations33% - Swanson6% - Best Naturals3% - Nature Made3% - THORNE3% - Open — no brand owns it (5 brands, 11%)
## **lysine 500mg capsules demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +7.6% search growth over the last 90 days.
8K6KSpike '24Black Friday '24Holiday '24Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Jan, Dec · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/health-household/lysine-500mg-capsules/trend)
## **Top lysine 500mg capsules search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **lysine 500mg**42K/yr+9.5%15.0% conv. - **l lysine 500 mg capsules**41K/yr+4.9%13.0% conv. - **l-lysine 500mg capsules**31K/yr+7.4%13.8% conv. - **l-lysine 500mg**7K/yr+4.5%12.6% conv. - **pure lysine**6K/yr+22.2%19.8% conv. - **lysine 500mg capsules**6K/yr+2.3%14.2% conv. - **pure encapsulations lysine**4K/yr+17.4%27.5% conv. - **l lysine 500 mg**3K/yr-3.9%13.0% conv. - **lysine pure encapsulations**2K/yr+31.0%25.2% conv. - **lysine 500 mg**3K/yr-2.8%12.6% conv. [**All search terms **](https://flapen.com/research/us/health-household/lysine-500mg-capsules/search-terms)
## **Top lysine 500mg capsules 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.
0%10%$43K20%$87K30%$130K40%$173K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Pure Encapsulations L-Lysine - Essential Amino Acid Supplement for Immune Support & Gum Lip Health* - with L-Lysine HCl - 90 Capsules**Pure Encapsulations**$14.85**4.8★5,688 rev](https://www.amazon.com/dp/B000H85JYC) [2**NOW Supplements L-Lysine (L-Lysine Hydrochloride) 500 mg Amino Acid 250 Tablets**NOW Foods**$11.75**4.7★5,272 rev](https://www.amazon.com/dp/B0002IHF1M) [3**NOW Foods Supplements L-Lysine (L-Lysine Monohydrochloride) 500 mg Amino Acid 100 Veg Capsules**NOW Foods**$7.12**4.7★2,134 rev](https://www.amazon.com/dp/B0004ZXHK6) [4**Now L-Lysine 500 mg 360 Vegetarian Capsules**NOW Foods**$23.97**4.7★250 rev](https://www.amazon.com/dp/B0D6XT61N4) [5**Swanson L-Lysine Amino Acid Supplement for Stress-Prone Adults Seeking Nervous System and Immune Support - 500 mg Free Form (300 Capsules)**Swanson**$16.73**4.8★784 rev](https://www.amazon.com/dp/B00068GBAO)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**L Lysine 500mg Tablets Super Lysine Immune Support & Healthy Skin 250 Count (Pack of 1) Plus Sticker vsl**Generic**$17.78**2 rev1y ago](https://www.amazon.com/dp/B0FWB125CH) [**Now L-Lysine 500 mg 360 Vegetarian Capsules**NOW Foods**$23.97**250 rev2y ago](https://www.amazon.com/dp/B0D6XT61N4) [**365 by Whole Foods Market L-Lysine 500mg 100 Count**365 by Whole Foods Market**$9.06**313 rev8y ago](https://www.amazon.com/dp/B074H6G8D7) [**Nutricost L-Lysine 1000mg Per Serving 250 Servings 500 Capsules - Gluten Free Non-GMO 500mg Per Capsule**Nutricost**$21.66**7,057 rev10y ago](https://www.amazon.com/dp/B01CV1FFS2) [**Best Naturals L-Lysine 500 mg 250 Tablets**Best Naturals**$9.99**1,372 rev11y ago](https://www.amazon.com/dp/B00MW30XB4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**L Lysine 500mg Tablets Super Lysine Immune Support & Healthy Skin 250 Count (Pack of 1) Plus Sticker vsl**Generic**$17.78**4.0★**▲ 120%**](https://www.amazon.com/dp/B0FWB125CH) [**Swanson L-Lysine Amino Acid Supplement for Stress-Prone Adults Seeking Nervous System and Immune Support - 500 mg Free Form (300 Capsules)**Swanson**$16.73**4.8★**▲ 87%**](https://www.amazon.com/dp/B00068GBAO) [**365 by Whole Foods Market L-Lysine 500mg 100 Count**365 by Whole Foods Market**$9.06**4.6★**▲ 62%**](https://www.amazon.com/dp/B074H6G8D7) [**Pure Encapsulations L-Lysine - Essential Amino Acid Supplement for Immune Support & Gum Lip Health* - with L-Lysine HCl - 90 Capsules**Pure Encapsulations**$14.85**4.8★**▲ 40%**](https://www.amazon.com/dp/B000H85JYC) [**Solaray L-Lysine 500mg - Pure L Lysine 500 mg Capsules Essential Amino Acid Supplement for Women and Men Health Support Pills for Adults and Kids Free Form Lab Verified - 120 Vegan Capsules**SOLARAY**$12.97**4.7★**▲ 34%**](https://www.amazon.com/dp/B00014D9FS)
**~~View all trending →~~**
## **What reviews say buyers love and hate about lysine 500mg capsules**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**13%
*“consistent in quality”*
**Value For Money**11%
*“Good price”*
**Cold Relief**11%
*“Helps me keep from getting cold sores”*
**Efficiency**6%
*“Works fast and well”*
**Ease Of Chewing/Swallowing**6%
*“are not difficult to swallow”*
**Fever Relief**5%
*“which is effective for me to prevent fever blisters”*
**Advertised Vs Actual Product**5%
*“Works as intended”*
**Vitamin**4%
*“Great supplement”*
**Nutritional Content**3%
*“Good supplement”*
**Dosage**3%
*“My friends say they take them and it works”*
### **What buyers complain about **
**Size-Overall**23%
*“Too big”*
**Value For Money**9%
*“waste of money”*
**Side Effects**7%
*“Side effects”*
**Functionality-Overall**6%
*“Dont work”*
**Ease Of Chewing/Swallowing**6%
*“Not sure it will get into mouth”*
**Pain Relief-Overall**4%
*“so I don't think they are very effective in preventing could sores”*
**Dosage**3%
*“It doesn't work like it's even 500mg”*
**Color Fading/Discoloration**2%
*“Pills are turning yellow which is concerning”*
**Nutritional Content**2%
*“There are no soy or corn ingredients in this supplement”*
**Stress/Anxiety**2%
*“I have bad anxiety when I drive places I don't know well”*
### **Top return reasons **
**Functionality-Overall**33%
**Vegan/Organic**33%
**Dosage**33%
## **Common lysine 500mg capsules questions**
- **Is lysine 500mg capsules profitable to sell on Amazon United States?**
- The niche generates $433K/yr across 15 tracked products. 90-day search growth is +7.6%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the lysine 500mg capsules niche?**
- 11 brands and 574 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 86% of demand.
- **What do buyers complain about in lysine 500mg capsules?**
- Top complaints mined from reviews: Size-Overall, Value For Money, Side Effects. The return rate is 0.0%.
- **When does demand for lysine 500mg capsules peak?**
- Demand peaks in Jan–Dec; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the lysine 500mg capsules niche?**
- Listings span $5.75–$39.41; the average listing price is $15.62 (sweet spot $15–$100). The average incumbent carries 3,340 reviews — the moat a new listing must climb.
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