Is zinc sulfate profitable to sell on Amazon United States?

The niche generates $137K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +2.3%. Flapen's verdict: Skip it (41/100).

How competitive is the zinc sulfate niche?

10 brands and 38 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in zinc sulfate?

Top complaints mined from reviews: Dosage, Size-Overall, Side Effects. The return rate is 0.0%.

When does demand for zinc sulfate peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the zinc sulfate niche?

Listings span $7.24–$17.72; the average listing price is $11.70 (sweet spot $15–$100). The average incumbent carries 22,214 reviews — the moat a new listing must climb.

zinc sulfate

Skip it

A deep review moat (22,214 avg reviews) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Great10.7%

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

Avg price

Okay$11.70

avg listing price — sweet spot $15–$100

Brand share

Okay82%

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

Market size

Okay$137K

$137K/yr · 110K searches

Growth

Okay+2.3%

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

Price range

Okay$7.24–$17.72

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad78%

top-5 click share — a locked-up shelf

Review moat

Bad22,214.45

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, zinc sulfate is a $137K/yr Amazon United States market (110K searches/yr). The top 5 brands hold 82% of demand. Verdict: Skip it — 41/100.

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

zinc sulfate market data

Units sold / yr: 10K–13K; avg 1,000–1,250/product
Revenue / yr: $117K–$146K; units × avg price
Conversion rate: 10.7%
Avg BSR: #159
Page quality: 0%
Prime: 100%
Sponsored: 82%
Out of stock: 0.6%
Avg brand age: 103 months
Avg seller age: 171 days

Competition & brand share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 rising

Sellers

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

14%

P Puregen Labs51%
RUGBY LABORATORIES12%
Nutricost9%
Earth Harmony Naturals6%
Pure Encapsulations5%
Nature's Bounty4%
Open — no brand owns it (4 brands, 14%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +2.3% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top zinc sulfate search terms

zinc sulfate65K/yr -1.7%6.9% conv.
zinc sulfate 220 mg17K/yr +8.4%19.7% conv.
sulfato de zinc9K/yr +21.6%3.7% conv.
sulfato de zinc para adultos9K/yr +10.0%6.6% conv.
zinc 220mg4K/yr -13.7%18.6% conv.
zinc sulphate3K/yr -21.8%4.5% conv.
zincate2K/yr +92.3%3.4% conv.

All search terms

Top zinc sulfate 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 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Zinc 220mg [High Potency] Supplement Zinc Sulfate for Immune Support System 100 Tablets

P Puregen Labs$9.934.7★4,203 rev

Rugby Zinc Sulfate 220 mg Tablets - Made with Zinc Sulfate Heptahydrate - Dietary Supplement - 100 Count (1 Pack)

RUGBY LABORATORIES$7.244.7★2,041 rev

Nutricost Zinc Sulfate (50mg) 120 Tablets - Vegan GMO-Free Gluten-Free

Nutricost$9.394.5★28 rev

Organic Liquid Zinc Sulfate - Pure Zinc Supplements for Skin Health Immune System Function and Normal Cell Growth in Adult Men & Women - Non-GMO Vegan 7.5mg - 2 Fl Oz

Earth Harmony Naturals$16.054.7★300 rev

Pure Encapsulations Zinc 30 mg - Supplement for Immune System Support Growth and Development and Wound Healing* - with Zinc Picolinate 30 mg - 60 Capsules

Pure Encapsulations$15.594.8★14,901 rev

Newest

by launch date

Nutricost Zinc Sulfate (50mg) 120 Tablets - Vegan GMO-Free Gluten-Free

Nutricost$9.3928 rev

2mo ago

Best Naturals Zinc Sulfate 220 mg 120 Tablets - 3rd Party Lab Tested - Made in the USA - Gluten Free & Non-GMO

Best Naturals$12.8851 rev

1y ago

WELMATE Zinc Sulfate 220 mg (50 mg Elemental Zinc) High Potency Tablets 200 Count (200 Day Supply) - Immune Support Dietary Supplement for Men & Women - Skin & Hair Health - Vegetarian Gluten Free

WELMATE$13.942,137 rev

4y ago

Natures Bounty Zinc 50mg Immune Support & Antioxidant Supplement Promotes Skin Health 1 Caplet Per Day Gluten Free 250 Vegetarian Caplets

Nature's Bounty$8.54215,458 rev

5y ago

Zinc 220mg [High Potency] Supplement Zinc Sulfate for Immune Support System 100 Tablets

P Puregen Labs$9.934,203 rev

5y ago

What buyers say about zinc sulfate

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

What buyers love

Quality-Overall18%

“the quality has been consistent”

Value For Money15%

“Great value”

Vitamin9%

“good supplement”

Advertised Vs Actual Product7%

“Works as indicated”

Ease Of Chewing/Swallowing6%

“Easy-to-take tablets for consistent nutritional support”

Immunity Booster5%

“This has helped with boosting my immune system”

Dosage4%

“Dosage is clearly stated on the label”

Nutritional Content3%

“are known to be a good source for supplements”

Cold Relief3%

“Helps colds get better”

Ease Of Use3%

“Easy to use”

What buyers complain about

Dosage12%

“Beware: dosage is too high”

Size-Overall9%

“Tiny”

Side Effects8%

“Made me so nauseous”

Acid Regulator/Stomach Ache Relief6%

“Horrible stomach pain”

Quality-Overall5%

“Cheap”

Ease Of Use4%

“Cant use”

Sleep Quality4%

“Makes me drowsy throughout the day”

Vitamin4%

“Theres not many supplements 3rd party tested”

Nutritional Content3%

“I don't actually have any evidence that these supplements are having any substantial benefits to my health”

Ease Of Chewing/Swallowing3%

“Very hard to swallow”

Top return reasons

Dosage29%

Functionality-Overall25%

Strength8%

Contamination8%

Vitamin8%

Taste-Overall8%

Joint Pain8%

Ease Of Chewing/Swallowing4%

Common questions

Is zinc sulfate profitable to sell on Amazon United States?: The niche generates $137K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +2.3%. Flapen's verdict: Skip it (41/100).
How competitive is the zinc sulfate niche?: 10 brands and 38 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in zinc sulfate?: Top complaints mined from reviews: Dosage, Size-Overall, Side Effects. The return rate is 0.0%.
When does demand for zinc sulfate peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the zinc sulfate niche?: Listings span $7.24–$17.72; the average listing price is $11.70 (sweet spot $15–$100). The average incumbent carries 22,214 reviews — the moat a new listing must climb.