Is stress b complex profitable to sell on Amazon United States?

The niche generates $247K/yr across 9 tracked products. 90-day search growth is +11.1%. Flapen's verdict: Skip it (46/100).

How competitive is the stress b complex niche?

6 brands and 610 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 97% of demand.

What do buyers complain about in stress b complex?

Top complaints mined from reviews: Smell, Dosage, Vitamin. The return rate is 0.0%.

When does demand for stress b complex peak?

Demand peaks in Jun–Jul; the busiest month runs 2.7× the quietest.

What does it cost to enter the stress b complex niche?

Listings span $8.76–$27.29; the average listing price is $16.54 (sweet spot $15–$100). The average incumbent carries 7,246 reviews — the moat a new listing must climb.

stress b complex

Skip it

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible14.7%

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

Avg price

Great$16.54

avg listing price — sweet spot $15–$100

Price range

Good$8.76–$27.29

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

Market size

Okay$247K

$247K/yr · 101K searches

Growth

Okay+11.1%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad7,246.44

avg incumbent reviews — the moat a new listing must climb

Competition

Bad85%

top-5 click share — a locked-up shelf

Brand share

Bad97%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, stress b complex is a $247K/yr Amazon United States market (101K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Jun–Jul. Verdict: Skip it — 46/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

stress b complex market data

Units sold / yr: 15K–20K; avg 2,500–3,000/product
Revenue / yr: $248K–$331K; units × avg price
Conversion rate: 14.7%
Avg BSR: #444
Page quality: 0%
Prime: 89%
Sponsored: 56%
Out of stock: 0.0%
Avg brand age: 94 months
Avg seller age: 156 days

Competition & brand share

The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 rising

Sellers

610

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

85%

Top 20: 100%

Open market

THORNE61%
Nature Made18%
365 by Whole Foods Market9%
BlueBonnet5%
MASON NATURAL3%
Carlyle3%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.1% search growth over the last 90 days.

Peak months: Jun, Jul · busiest ÷ quietest = 2.7×

Open Trend

Top stress b complex search terms

stress b complex31K/yr +13.4%8.1% conv.
thorne stress b-complex24K/yr +2.4%24.4% conv.
stress b complex with vitamin c and zinc7K/yr +43.3%2.6% conv.
b complex stress5K/yr +12.2%5.3% conv.
vitamin stress b complex4K/yr +123.6%0.5% conv.
b complex with zinc5K/yr -4.0%3.1% conv.
vitamin b stress complex4K/yr -6.2%6.8% conv.
b stress complex vitamins5K/yr -5.8%7.6% conv.
stress b complex vitamins4K/yr -6.5%7.7% conv.
stress b3K/yr -12.3%11.8% conv.

All search terms

Top stress b complex products on Amazon

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

Top sellers

by 90-day click share

THORNE - Stress B-Complex - Vitamins B2 B6 B12 & Folate in Highly-Absorbable and Active Forms - Extra Vitamin B5 for Adrenal Support Stress Management & Immune Function* - 60 Servings

THORNE$25.344.6★4,120 rev

Nature Made Super B Complex with Vitamin C & Folic Acid 140 Tablets

Nature Made$9.634.7★43,424 rev

Nature Made Stress B Complex with Vitamin C and Zinc B Complex Vitamins for Women and Men Immune Support 75 Tablets 75 Day Supply

Nature Made$10.684.7★10,555 rev

THORNE - Basic B-Complex - Tissue-Ready Vitamin B Complex Supplement with Choline - Supports Cellular Energy Production Brain Health & Red Blood Cell Formation* - Gluten-Free - 60 Servings

THORNE$26.404.7★4,620 rev

365 by Whole Foods Market Vitamin B Stress Complex with Vitamin C 90 Veg Capsules

365 by Whole Foods Market$12.124.6★73 rev

Newest

by launch date

Carlyle Stress B Complex with Vitamin C | 180 Caplets

Carlyle$8.76226 rev

3y ago

MASON NATURAL Stress B Complex with Antioxidants + Zinc 6 Month Supply Dual Action Formula Supports Energy Metabolism & Immune Health 3 Pack

MASON NATURAL$18.42101 rev

3y ago

365 by Whole Foods Market Vitamin B Stress Complex with Vitamin C 90 Veg Capsules

365 by Whole Foods Market$12.1273 rev

7y ago

365 by Whole Foods Market Stress B-Complex with Vitamin C Energy & Nervous System Support Vegan 60 Capsules

365 by Whole Foods Market$10.20865 rev

8y ago

Nature Made Super B Complex with Vitamin C & Folic Acid 140 Tablets

Nature Made$9.6343,424 rev

15y ago

What buyers say about stress b complex

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

What buyers love

Quality-Overall20%

“The brand is straightforward”

Vitamin20%

“Great Daily Vitamin Boost”

Energy Level7%

“Helps me with energy a bit”

Value For Money7%

“Good value”

Advertised Vs Actual Product6%

“As described”

Ease Of Chewing/Swallowing5%

“Not hard to swallow”

Stress/Anxiety3%

“It does help with stress”

Joint Pain2%

“Really helped with toe neuropathy”

Acid Regulator/Stomach Ache Relief2%

“Works wonderfully and does not upset my belly”

Nutritional Content2%

“Healthy Choice”

What buyers complain about

Smell11%

“There is a slight smell”

Dosage7%

“Any dose above 1.4mg / day is toxic to your body”

Vitamin7%

“Smelly vitamins”

Energy Level6%

“I can't tell a difference in energy”

Side Effects5%

“Caused Strong Burping and Discomfort”

Taste-Overall5%

“they would make my other pills taste/smell horrible too”

Ingredients-Overall3%

“all of the nasty chemicals used during production are removed”

Advertised Vs Actual Product3%

“vitamins. B12 I wanted something that didnt have arsenic in it and this does not.”

Calcium3%

“Too much Niacin”

Sleep Quality3%

“If you do buy do not take it in the evening, will cause uneasiness and potentially insomnia”

Top return reasons

Vitamin67%

Acid Regulator/Stomach Ache Relief33%

Common questions

Is stress b complex profitable to sell on Amazon United States?: The niche generates $247K/yr across 9 tracked products. 90-day search growth is +11.1%. Flapen's verdict: Skip it (46/100).
How competitive is the stress b complex niche?: 6 brands and 610 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 97% of demand.
What do buyers complain about in stress b complex?: Top complaints mined from reviews: Smell, Dosage, Vitamin. The return rate is 0.0%.
When does demand for stress b complex peak?: Demand peaks in Jun–Jul; the busiest month runs 2.7× the quietest.
What does it cost to enter the stress b complex niche?: Listings span $8.76–$27.29; the average listing price is $16.54 (sweet spot $15–$100). The average incumbent carries 7,246 reviews — the moat a new listing must climb.