---
title: "Cold Sore Prevention Supplements — $355K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/cold-sore-prevention-supplements"
last_updated: "2026-08-06T01:14:50.811Z"
locale: en
meta:
description: "Niche score 43/100 · $355K/yr market · 125K searches/yr · $16.38 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $355K/yr market · 125K searches/yr · $16.38 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Cold Sore Prevention Supplements — $355K/yr Amazon US Niche (2026) - Flapen"
---
# **cold sore prevention supplements**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 53Growth 22Conversion 98Competition 13Returns 100Price range 60Avg price 78Brand share 0Review moat 22Quality gap 22
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****17.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$16.38**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$7.76–$25.91**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$355K**
$355K/yr · 125K searches
**Growth**
**Bad****-6.2%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****9,898.7**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****84%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, cold sore prevention supplements is a $355K/yr Amazon United States market (125K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 43/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **cold sore prevention supplements market data**
- **Units sold / yr**
- **20K–25K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **$328K–$410K**
- units × avg price
- **Conversion rate**
- **17.3%**
- **Avg BSR**
- **#207**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **87 months**
- **Avg seller age**
- **148 days**
## **Competition & brand share**
The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**2 **—flat
**Sellers**
**596**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**84%**
Top 20: 100%
**Open market**
**0%**
- Quantum76% - NOW Foods24%
## **Demand**
Weekly Amazon search volume, last 47 weeks — -6.2% search growth over the last 90 days.
5K4KSpike '25Holiday '25Spike '26Aug '25Oct '25Dec '25Jan '26Mar '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/health-household/cold-sore-prevention-supplements/trend)
## **Top cold sore prevention supplements search terms**
- **super lysine**39K/yr-6.3%14.6% conv. - **super lysine immune support**18K/yr+4.8%11.1% conv. - **quantum health super lysine**11K/yr-11.3%11.7% conv. - **now lysine**8K/yr-8.1%14.2% conv. - **super lysine plus**6K/yr-16.8%10.6% conv. - **superlysine**5K/yr-25.9%11.2% conv. - **cold sore pills**4K/yr+1.2%2.4% conv. - **superlysine+**4K/yr+27.0%17.3% conv. - **now lysine 1000mg capsules**3K/yr+23.0%21.8% conv. - **now l-lysine**3K/yr+23.6%10.7% conv. [**All search terms **](https://flapen.com/research/us/health-household/cold-sore-prevention-supplements/search-terms)
## **Top cold sore prevention supplements 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%$53K30%$106K45%$160K60%$213K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Quantum Health SuperLysine+ 1500mg L-lysine Immune Support 180 Tablets**Quantum**$19.47**4.6★14,189 rev](https://www.amazon.com/dp/B001CMZB4U) [2**Quantum Health SuperLysine+ 1500mg L-lysine Immune Support 90 Tablets**Quantum**$11.96**4.7★2,612 rev](https://www.amazon.com/dp/B000IRLJ00) [3**NOW Foods Supplements (L-Lysine Hydrochloride) 1 000 mg Double Strength Amino Acid 100 Tablets**NOW Foods**$8.44**4.6★38,103 rev](https://www.amazon.com/dp/B000Z9361G) [4**Quantum SuperLysine+ Cold Sore Treatment Ointment|Relieves Pain Burning and Itching|Cuts Healing Time in Half|0.25 Ounce**Quantum**$8.70**4.6★2,324 rev](https://www.amazon.com/dp/B001CMZ8MA) [5**Now Foods L-Lysine 1000mg - Double Strength - 300 Tablets - Non-GMO Amino Acid Supplement (Llysine Hydrochloride)- 1000 mg Tabs - Vegan/Vegetarian**NOW Foods**$25.91**4.8★574 rev](https://www.amazon.com/dp/B0BTS1KGQG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Now L-Lysine 500 mg 360 Vegetarian Capsules**NOW Foods**$23.97**250 rev2y ago](https://www.amazon.com/dp/B0D6XT61N4) [**Now Foods L-Lysine 1000mg - Double Strength - 300 Tablets - Non-GMO Amino Acid Supplement (Llysine Hydrochloride)- 1000 mg Tabs - Vegan/Vegetarian**NOW Foods**$25.91**574 rev3y ago](https://www.amazon.com/dp/B0BTS1KGQG) [**NOW Foods Supplements L-Lysine (L-Lysine Hydrochloride) 1 000 mg Double Strength Amino Acid 250 Tablets**NOW Foods**$18.43**38,103 rev8y ago](https://www.amazon.com/dp/B0768HGMBY) [**Quantum Health SuperLysine+ Lip Sunscreen SPF 21 Clear Balm 0.17 oz**Quantum**$7.76**1,532 rev18y ago](https://www.amazon.com/dp/B001CMT8HQ) [**Quantum Health SuperLysine+ 1500mg L-lysine Immune Support 90 Tablets**Quantum**$11.96**2,612 rev19y ago](https://www.amazon.com/dp/B000IRLJ00)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Now Foods L-Lysine 1000mg - Double Strength - 300 Tablets - Non-GMO Amino Acid Supplement (Llysine Hydrochloride)- 1000 mg Tabs - Vegan/Vegetarian**NOW Foods**$25.91**4.8★**▲ 125%**](https://www.amazon.com/dp/B0BTS1KGQG) [**Quantum Super Lysine 180 Count**Quantum**$21.25**4.8★**▲ 89%**](https://www.amazon.com/dp/B012T9A8DS) [**NOW Foods Supplements L-Lysine (L-Lysine Hydrochloride) 1 000 mg Double Strength Amino Acid 250 Tablets**NOW Foods**$18.43**4.6★**▲ 88%**](https://www.amazon.com/dp/B0768HGMBY) [**Quantum Health SuperLysine+ 1500mg L-lysine Immune Support 90 Tablets**Quantum**$11.96**4.7★**▲ 58%**](https://www.amazon.com/dp/B000IRLJ00) [**Quantum SuperLysine+ Cold Sore Treatment Ointment|Relieves Pain Burning and Itching|Cuts Healing Time in Half|0.25 Ounce**Quantum**$8.70**4.6★**▲ 48%**](https://www.amazon.com/dp/B001CMZ8MA)
**~~View all trending →~~**
## **What buyers say about cold sore prevention supplements**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Cold Relief**14%
*“Helps me keep from getting cold sores”*
**Quality-Overall**13%
*“consistent in quality”*
**Vitamin**9%
*“Great vitamin supplement”*
**Value For Money**8%
*“Affordable”*
**Immunity Booster**7%
*“supportive supplement for immune health”*
**Efficiency**6%
*“Effective”*
**Skin Health**4%
*“GREAT FOR Eczema”*
**Advertised Vs Actual Product**4%
*“Great value if it works as advertised”*
**Ease Of Chewing/Swallowing**3%
*“Ive never had a problem with swallowing pills”*
**Dosage**2%
*“And so, if you're getting these to be easier to swallow than the larger dose, the only easier is that they are in gelcap form”*
### **What buyers complain about **
**Size-Overall**26%
*“The container is also very small”*
**Ease Of Chewing/Swallowing**13%
*“Hard to Swallow”*
**Dosage**7%
*“They don't do well in the bottle”*
**Advertised Vs Actual Product**6%
*“The picture provided was misleading”*
**Value For Money**3%
*“Cost too much for the effectiveness”*
**Side Effects**3%
*“after that I started to feel light headed”*
**Functionality-Overall**3%
*“It didnt help”*
**Smell**2%
*“have a garlic smell”*
**Ingredients-Overall**2%
*“This item has NO lysine in it”*
**Hard Feel**2%
*“they are so hard that I couldn't even break them into two”*
### **Top return reasons **
**Size-Overall**50%
**Advertised Vs Actual Product**33%
**Ease Of Chewing/Swallowing**17%
## **Common questions**
- **Is cold sore prevention supplements profitable to sell on Amazon United States?**
- The niche generates $355K/yr across 10 tracked products. 90-day search growth is -6.2%. Flapen's verdict: Skip it (43/100).
- **How competitive is the cold sore prevention supplements niche?**
- 2 brands and 596 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in cold sore prevention supplements?**
- Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Dosage. The return rate is 0.0%.
- **What does it cost to enter the cold sore prevention supplements niche?**
- Listings span $7.76–$25.91; the average listing price is $16.38 (sweet spot $15–$100). The average incumbent carries 9,899 reviews — the moat a new listing must climb.
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