---
title: "Reviews — casein protein powder - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/casein-protein-powder/reviews"
last_updated: "2026-08-11T01:50:52.347Z"
locale: en
meta:
  description: "Niche score 63/100 · $2.8M/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 63/100 · $2.8M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — casein protein powder - Flapen"
---

# **casein protein powder**

**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 96Growth 24Conversion 60Competition 59Returns 100Price range 95Avg price 92Brand share 30Review moat 43Quality gap 60

**Returns**

**Incredible****0.0%**

return rate — above 5% kills the launch gate

**Market size**

**Incredible****$2.8M**

$2.8M/yr · 979K searches

**Price range**

**Incredible****$22.36–$99.33**

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

**Avg price**

**Great****$54.59**

avg listing price — sweet spot $15–$100

**Conversion**

**Good****5.1%**

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

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Competition**

**Good****49%**

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

**Review moat**

**Okay****2,154.93**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Okay****87%**

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

**Growth**

**Bad****-1.6%**

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

**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")

## Reviews