---
title: "Trend — serotonin supplement - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/serotonin-supplement/trend"
last_updated: "2026-08-06T00:51:31.124Z"
locale: en
meta:
  description: "Niche score 57/100 · $217K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 57/100 · $217K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — serotonin supplement - Flapen"
---

# **serotonin supplement**

**Worth a look**

Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 42Growth 19Conversion 58Competition 46Returns 100Price range 88Avg price 95Brand share 73Review moat 40Quality gap 67

**Returns**

**Incredible****0.0%**

return rate — above 5% kills the launch gate

**Avg price**

**Incredible****$31.88**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.96–$67.15**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Brand share**

**Good****61%**

top-5 brand share — brands hold most of the demand

**Quality gap**

**Good****4.3★**

avg incumbent rating — lower means beatable quality

**Conversion**

**Good****4.9%**

search→purchase rate — share of searches ending in a sale

**Competition**

**Okay****57%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Okay****$217K**

$217K/yr · 139K searches

**Review moat**

**Okay****2,544**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-12.3%**

90-day search growth — must beat 0% to launch

## Trend