---
title: "Liquid Vitamin D — $55K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/liquid-vitamin-d"
last_updated: "2026-08-12T16:14:13.309Z"
locale: en
meta:
description: "Amazon product research for liquid vitamin d: $55K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for liquid vitamin d: $55K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Liquid Vitamin D — $55K/mo Amazon US Product Research (2026)"
---
# **Liquid Vitamin D**
**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 67Growth 21Conversion 76Competition 44Returns 100Price range 67Avg price 90Brand share 62Review moat 44Quality gap 24
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$21.19**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****7.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$662K**
$662K/yr · 428K searches
**Price range**
**Good****$6.29–$33.00**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****68%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****59%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,144.04**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-8.1%**
90-day search growth — must beat 0% to launch
## **Is liquid vitamin d profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, liquid vitamin d is a $662K/yr Amazon United States market (428K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Jan. Verdict: Worth a look — 56/100.
Data updated Aug 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **liquid vitamin d market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **30K–40K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **$636K–$848K**
- units × avg price
- **Conversion rate**
- **7.3%**
- **Avg BSR**
- **#265**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **87%**
- **Out of stock**
- **1.0%**
- **Avg brand age**
- **86 months**
- **Avg seller age**
- **160 days**
## **Competition: brands, sellers & click share**
The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**19 **▼falling
**Sellers**
**56**
**Top-5 brand share**
**68%**
Top 20: 100%
**Top-5 click share**
**59%**
Top 20: 96%
**Open market**
**28%**
- NOW Foods24% - NUSAVA15% - MARYRUTH'S14% - THORNE9% - NUTRAHARMONY5% - Carlyle4%
## **liquid vitamin d demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -8.1% search growth over the last 90 days.
15K10KSpike '24Spike '25Prime Day '25 seasonDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/health-household/liquid-vitamin-d/trend)
## **Top liquid vitamin d search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **liquid vitamin d**130K/yr-7.0%6.9% conv. - **vitamin d liquid**66K/yr-7.9%6.6% conv. - **vitamin d3 liquid**26K/yr+8.5%5.1% conv. - **vitamin d drops adult**30K/yr-28.4%8.3% conv. - **vitamin d liquid drops**20K/yr-24.2%7.1% conv. - **vitamin d3 drops**24K/yr-13.9%5.4% conv. - **liquid vitamin d3**23K/yr-15.9%6.0% conv. - **vitamin d oil**19K/yr-9.0%2.6% conv. - **liquid d3**14K/yr-1.0%5.3% conv. - **d3 drops**11K/yr-9.6%5.1% conv. [**All search terms **](https://flapen.com/research/us/health-household/liquid-vitamin-d/search-terms)
## **Top liquid vitamin d 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%$66K20%$132K30%$199K40%$265K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NOW Foods Supplements Liquid Vitamin D-3 Strong Bones* Structural Support* 2-Ounce**NOW Foods**$6.29**4.5★4,753 rev](https://www.amazon.com/dp/B001N4JYX6) [2**(2 Pack) Organic Vitamin D3 K2 Drops with MCT Oil & Omega 3 - Liquid Vitamin D3 5000 IU - K2 D3 Vitamin Supplement - Vitamin D Drops for Women & Men - No Fillers Non-GMO GMP Unflavored (2 Fl Oz)**NUSAVA**$26.39**4.5★13,741 rev](https://www.amazon.com/dp/B08CY92YHP) [3**MARYRUTHS Megadose Vitamin D3 Drops Vitamin D 4000 IU Vegan 30 Servings**MARYRUTH'S**$22.56**4.6★1,897 rev](https://www.amazon.com/dp/B09PFFZ9BN) [4**Vitamin D3 K2 USDA Organic Drops - Vitamin D3 10000 IU & K2 120mcg - 2 OZ**NUTRAHARMONY**$19.17**4.7★1,312 rev](https://www.amazon.com/dp/B0DNNFTK92) [5**THORNE Vitamin D3 Liquid 4 000 IU with Precision Dropper 30 Servings**THORNE**$23.53**4.6★84 rev](https://www.amazon.com/dp/B0G2YVCF5Q)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**THORNE Vitamin D3 Liquid 4 000 IU with Precision Dropper 30 Servings**THORNE**$23.53**84 rev6mo ago](https://www.amazon.com/dp/B0G2YVCF5Q) [**Dr. Berg Maximum Strength Vitamin D3 K2 Liquid Drops with MCT Oil 5 000 IU Liquid Vitamin D3 with K2 Supports Strong Bones Heart Energy Immunity and Overall Vitality* - Unflavored 1 Fl Oz**Dr. Berg Nutritionals**$21.97**592 rev11mo ago](https://www.amazon.com/dp/B0F3JSR8T7) [**Vitamin D3 K2 USDA Organic Drops - Vitamin D3 10000 IU & K2 120mcg - 2 OZ**NUTRAHARMONY**$19.17**1,312 rev1y ago](https://www.amazon.com/dp/B0DNNFTK92) [**5-in-1 Vitamin D3 K2 Drops Vitamin D3 10400 IU & K2(MK-7) 200mcg**Venture Pal**$15.84**514 rev1y ago](https://www.amazon.com/dp/B0DJRD5LCB) [**Liquid Vitamin D3 10000 IU - USDA Organic Vitamin D Drops for Adults & Kids**IQ BIOLOGY**$20.25**107 rev1y ago](https://www.amazon.com/dp/B0DHSMZLRM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Liquid Vitamin D3 10000 IU - USDA Organic Vitamin D Drops for Adults & Kids**IQ BIOLOGY**$20.25**4.5★**▲ 150%**](https://www.amazon.com/dp/B0DHSMZLRM) [**THORNE Vitamin D3 Liquid 4 000 IU with Precision Dropper 30 Servings**THORNE**$23.53**4.6★**▲ 117%**](https://www.amazon.com/dp/B0G2YVCF5Q) [**Natures Truth Vitamin D3 Liquid | 5000 IU | 2 fl oz | Non-GMO and Gluten Free Supplement**Nature's Truth**$7.33**4.6★**▲ 57%**](https://www.amazon.com/dp/B06X9HS91L) [**NOW Foods Supplements Liquid Vitamin D-3 Strong Bones* Structural Support* 2-Ounce**NOW Foods**$6.29**4.5★**▲ 52%**](https://www.amazon.com/dp/B001N4JYX6) [**Dr. Berg Maximum Strength Vitamin D3 K2 Liquid Drops with MCT Oil 5 000 IU Liquid Vitamin D3 with K2 Supports Strong Bones Heart Energy Immunity and Overall Vitality* - Unflavored 1 Fl Oz**Dr. Berg Nutritionals**$21.97**4.8★**▲ 43%**](https://www.amazon.com/dp/B0F3JSR8T7)
**~~View all trending →~~**
## **What reviews say buyers love and hate about liquid vitamin d**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**21%
*“Healthy vitamin”*
**Quality-Overall**16%
*“The vial is good quality”*
**Taste-Overall**9%
*“No weird taste”*
**Ease Of Use**8%
*“Easy to Take”*
**Value For Money**4%
*“Amazing price”*
**Efficiency**4%
*“It really does work”*
**Dosage**4%
*“convenient with the dropper for accurate dosing”*
**Energy Level**3%
*“More energy”*
**Absorbency**2%
*“Absorbs well”*
**Advertised Vs Actual Product**2%
*“Does the Job”*
### **What buyers complain about **
**Taste-Overall**21%
*“HORRIBLE TASTE”*
**Vitamin**9%
*“I should not have taken the vitamin”*
**Dosage**7%
*“exact dosing is difficult”*
**Dispensing Mechanism**5%
*“Hard to dispense”*
**Ease Of Use**5%
*“I cant bring myself to use it”*
**Value For Money**3%
*“A little pricey”*
**Functionality-Overall**3%
*“Didn't work”*
**Flavor**2%
*“not a huge fan of the orange flavor”*
**Regulates Digestion**1%
*“Stomach problems”*
**Durability**1%
*“it broke after the 2nd use”*
### **Top return reasons **
**Dosage**18%
**Leak-Proof**14%
**Value For Money**14%
**Flavor**9%
**Dilute/Watery**9%
**Taste-Overall**7%
**Ingredients-Overall**5%
**Functionality-Overall**5%
**Side Effects**5%
**Acid Regulator/Stomach Ache Relief**5%
## **Common liquid vitamin d questions**
- **Is liquid vitamin d profitable to sell on Amazon United States?**
- The niche generates $662K/yr across 23 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -8.1%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the liquid vitamin d niche?**
- 19 brands and 56 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 68% of demand.
- **What do buyers complain about in liquid vitamin d?**
- Top complaints mined from reviews: Taste-Overall, Vitamin, Dosage. The return rate is 0.0%.
- **When does demand for liquid vitamin d peak?**
- Demand peaks in Jan; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the liquid vitamin d niche?**
- Listings span $6.29–$33.00; the average listing price is $21.19 (sweet spot $15–$100). The average incumbent carries 2,144 reviews — the moat a new listing must climb.
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