---
title: "Reviews — vitamin d and magnesium - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-d-and-magnesium/reviews"
last_updated: "2026-08-09T22:00:18.990Z"
locale: en
meta:
  description: "Niche score 47/100 · $335K/yr market · 286K searches/yr · $17.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 47/100 · $335K/yr market · 286K searches/yr · $17.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — vitamin d and magnesium - Flapen"
---

# **vitamin d and magnesium**

**Skip it**

A concentrated shelf (top 5 take 74% of clicks) — this niche doesn't clear our bar today.

Market size 53Growth 31Conversion 72Competition 22Returns 99Price range 81Avg price 82Brand share 30Review moat 24Quality gap 22

**Returns**

**Incredible****0.3%**

return rate — above 5% kills the launch gate

**Avg price**

**Great****$17.76**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$8.97–$42.94**

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

**Conversion**

**Good****6.6%**

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

**Market size**

**Good****$335K**

$335K/yr · 286K searches

**Growth**

**Okay****+5.0%**

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

**Brand share**

**Okay****87%**

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

**Review moat**

**Bad****5,101.93**

avg incumbent reviews — the moat a new listing must climb

**Competition**

**Bad****74%**

top-5 click share — a locked-up shelf

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

## Reviews