Is liquid fiber profitable to sell on Amazon United States?

The niche generates $354K/yr across 17 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -21.0%. Flapen's verdict: Worth a look (52/100).

How competitive is the liquid fiber niche?

11 brands and 88 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in liquid fiber?

Top complaints mined from reviews: Taste-Overall, Flavor, Value For Money. The return rate is 0.0%.

When does demand for liquid fiber peak?

Demand peaks in Apr–May–Jun; the busiest month runs 3.2× the quietest.

What does it cost to enter the liquid fiber niche?

Listings span $12.73–$83.85; the average listing price is $28.89 (sweet spot $15–$100). The average incumbent carries 3,169 reviews — the moat a new listing must climb.

Liquid Fiber

Worth a look

Shows low returns (0.0%), but soft demand (-21.0% this quarter) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible12.9%

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

Avg price

Incredible$28.89

avg listing price — sweet spot $15–$100

Price range

Great$12.73–$83.85

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

Market size

Good$354K

$354K/yr · 95K searches

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Okay3,169.29

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay89%

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

Competition

Bad74%

top-5 click share — a locked-up shelf

Growth

Bad-21.0%

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

Is liquid fiber profitable on Amazon?

According to Flapen's Amazon United States niche tracking, liquid fiber is a $354K/yr Amazon United States market (95K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Apr–May–Jun. Verdict: Worth a look — 52/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

liquid fiber market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 10K–13K; avg 500–750/product
Revenue / yr: $289K–$361K; units × avg price
Conversion rate: 12.9%
Avg BSR: #267
Page quality: 0%
Prime: 100%
Sponsored: 71%
Out of stock: 0.0%
Avg brand age: 66 months
Avg seller age: 156 days

Competition: brands, sellers & click share

The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

74%

Top 20: 100%

Open market

Medtrition57%
Zarbee's19%
Benefiber5%
Culturelle4%
HEALTH DIRECT3%
Trace Minerals2%
Open — no brand owns it (5 brands, 8%)

liquid fiber demand & seasonality

Weekly Amazon search volume, last 104 weeks — -21.0% search growth over the last 90 days.

Peak months: Apr, May, Jun · busiest ÷ quietest = 3.2×

Open Trend

Top liquid fiber search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

liquid fiber23K/yr -44.2%4.1% conv.
hyfiber13K/yr +1.1%12.9% conv.
hyfiber liquid fiber for kids9K/yr +2.0%17.0% conv.
liquid fiber for adults5K/yr +45.0%4.7% conv.
fiber powder for kids6K/yr -16.9%8.1% conv.
benefiber for kids5K/yr -5.0%5.4% conv.
zarbees regularity support kids4K/yr -32.5%25.2% conv.
liquid fiber supplement4K/yr -36.6%2.4% conv.
zarbees fiber powder kids3K/yr -7.3%24.5% conv.
hy fiber3K/yr -2.5%9.1% conv.

All search terms

Top liquid fiber 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Medtrition HyFiber Liquid Fiber for Kids in Only One Tablespoon Supports Regularity and Softer Stools FOS Prebiotics for Gut Health 6 Grams of Fiber 32 Servings per Bottle

Medtrition$25.024.6★1,315 rev

Medtrition HyFiber Daily Liquid Fiber for Regularity and Soft Stools 12 Grams Soluble Fiber 32 fl oz 1 Bottle

Medtrition$27.164.6★620 rev

Zarbees Childrens Regularity Support Prebiotic Fiber Powder Flavorless Sugar Free Gluten-Free Daily Fiber Supplement for Kids & Toddlers 1 to 12 Years 5.82 oz

Zarbee's$18.344.6★533 rev

Medtrition HyFiber Liquid Fiber for Kids in Only One Tablespoon Supports Regularity and Softer Stools FOS Prebiotics for Gut Health 6 Grams of Fiber 32 Servings per Bottle 16 Fl Oz (Pack of 2)

Medtrition$39.764.6★1,315 rev

Culturelle Kids Probiotic + Fiber Packets (Ages 3+) - 24 Count - Digestive Health & Immune Support - Helps Restore Regularity (Packaging may vary)

Culturelle$18.644.7★13,363 rev

Newest

by launch date

MARYRUTH'S$25.0524 rev

6mo ago

Liquid Salad Sweetened with Stevia High Fiber Superfood Pouches by Liquid Plus Convenient Greens Smoothie Drink with Prebiotic Fiber Veggies and Fruits Healthy Vegan Snack Gut Health Support 14-Pack

Liquid+$39.48266 rev

10mo ago

GADAVYT Fiber 20 - High Fiber Supplement for Women & Men 20g Liquid Soluble Fiber/Serving Prebiotic & Postbiotic Complex + Vitamins A D3 E & Magnesium Gut Health Digestive Health 16 fl oz

GADAVYT$26.0047 rev

10mo ago

Zarbees Childrens Regularity Support Prebiotic Fiber Powder Flavorless Sugar Free Gluten-Free Daily Fiber Supplement for Kids & Toddlers 1 to 12 Years 5.82 oz

Zarbee's$18.34533 rev

1y ago

Zarbees Childrens Digestive Care Support* Prebiotic Fiber Syrup Grape Flavor with Other Natural Flavors Liquid Fiber for Kids Daily Digestive Support Gluten Free Agave 8 fl oz

Zarbee's$17.19118 rev

1y ago

What reviews say buyers love and hate about liquid fiber

What buyers praise and complain about, mined from review topics.

What buyers love

Taste-Overall12%

“Great taste”

Nutritional Content9%

“Good Source Of Fiber”

Efficiency8%

“Works Well”

Solubility7%

“Mixes easily”

Quality-Overall7%

“I can tell they use high-quality ingredients”

Ease Of Use7%

“Easy to take”

Regulates Digestion6%

“Easy on your stomach”

Flavor4%

“Great flavor and easy to take”

Value For Money3%

“Great value”

Advertised Vs Actual Product3%

“Works great as advertised”

What buyers complain about

Taste-Overall22%

“Awful aftertaste”

Flavor6%

“The flavor/ taste was off-putting for me”

Value For Money5%

“over priced”

Functionality-Overall5%

“Doesnt work”

Nutritional Content3%

“Gross fiber”

Texture/Consistency-Overall3%

“it makes me gag because of the texture”

Regulates Digestion2%

“sometimes it seems to make my digestion worse”

Artificial Sweeteners2%

“this was like an artificially sweetened juice of sorts”

Side Effects2%

“This gave me heartburn”

Sweetness2%

“this was like an artificially sweetened juice of sorts”

Top return reasons

Functionality-Overall22%

Taste-Overall22%

Solubility11%

Ingredients-Overall11%

Quality-Overall11%

Value For Money11%

Leak-Proof11%

Common liquid fiber questions

Is liquid fiber profitable to sell on Amazon United States?: The niche generates $354K/yr across 17 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -21.0%. Flapen's verdict: Worth a look (52/100).
How competitive is the liquid fiber niche?: 11 brands and 88 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in liquid fiber?: Top complaints mined from reviews: Taste-Overall, Flavor, Value For Money. The return rate is 0.0%.
When does demand for liquid fiber peak?: Demand peaks in Apr–May–Jun; the busiest month runs 3.2× the quietest.
What does it cost to enter the liquid fiber niche?: Listings span $12.73–$83.85; the average listing price is $28.89 (sweet spot $15–$100). The average incumbent carries 3,169 reviews — the moat a new listing must climb.