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52

phentermine weight loss pills

Worth a look

Shows low returns (0.0%), but a small market ($54K/yr) keeps it on the watch list.

Market size 14Growth 22Conversion 26Competition 50Returns 100Price range 93Avg price 95Brand share 63Review moat 24Quality gap 96

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Quality gap

Incredible3.9★

avg incumbent rating — lower means beatable quality

Avg price

Incredible$34.30

avg listing price — sweet spot $15–$100

Price range

Great$13.58–$64.44

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

Brand share

Good67%

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

Competition

Okay55%

top-5 click share — leaders hold, buyers still browse

Conversion

Okay2.1%

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

Review moat

Bad6,075.83

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-6.4%

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

Market size

Bad$54K

$54K/yr · 76K searches

According to Flapen's Amazon United States niche tracking, phentermine weight loss pills is a $54K/yr Amazon United States market (76K searches/yr). The top 5 brands hold 67% of demand. Verdict: Worth a look — 52/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

phentermine weight loss pills market data

Units sold / yr
1K–2K
avg 0–100/product
Revenue / yr
$43K–$51K
units × avg price
Conversion rate
2.1%
Avg BSR
#837
Page quality
0%
Prime
87%
Sponsored
91%
Out of stock
9.9%
Avg brand age
59 months
Avg seller age
157 days

Competition & brand share

The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 rising

Sellers

42

Top-5 brand share

67%

Top 20: 100%

Top-5 click share

55%

Top 20: 97%

Open market

28%

  • Generic18%
  • PhenAprin17%
  • Phenelite11%
  • Vitamart11%
  • KAKA DR10%
  • stripfast50005%

Demand

Weekly Amazon search volume, last 33 weeks — -6.4% search growth over the last 90 days.
3K2KSpike '26Nov '25Dec '25Feb '26Mar '26Apr '26May '26Jun '26

Top phentermine weight loss pills 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.

0%4%$2K8%$4K12%$7K16%$9K1101001K10K100K Reviews — right = deep review moat Market 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.

What buyers say about phentermine weight loss pills

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

What buyers love

Weight Loss20%

“help with weight loss”

Energy Level9%

“Energy boost”

Quality-Overall9%

“Excellent Product”

Ease Of Use5%

“Easy to Take”

Nutritional Content5%

“Good supplement”

Regulates Digestion4%

“Digestive support”

Advertised Vs Actual Product4%

“As advertised”

Sleep Quality3%

“Helps with sleep”

Efficiency3%

“They were very effective”

Value For Money3%

“Great for the money”

What buyers complain about

Functionality-Overall20%

“Did not work”

Weight Loss15%

“No weight loss”

Side Effects8%

“I have been experiencing terrible headaches”

Value For Money5%

“Not Worth it”

Acid Regulator/Stomach Ache Relief5%

“it also makes me feel bloated”

Nutritional Content4%

“When I take these consistently I can barely eat”

Dosage3%

“I cant take this”

Energy Level3%

“Did nothing for energy”

Sleep Quality2%

“I cant sleep”

Regulates Digestion2%

“Perhaps its just taking a little bit longer for me to digest than others”

Top return reasons

Functionality-Overall26%
Side Effects13%
Acid Regulator/Stomach Ache Relief11%
Sleep Quality9%
Comfort-Overall7%
Advertised Vs Actual Product7%
Dosage4%
Regulates Digestion4%
Certifications4%
Age Suitability4%

Common questions

Is phentermine weight loss pills profitable to sell on Amazon United States?
The niche generates $54K/yr across 23 tracked products. 5 of 8 products launched in the last 360 days are still selling. 90-day search growth is -6.4%. Flapen's verdict: Worth a look (52/100).
How competitive is the phentermine weight loss pills niche?
17 brands and 42 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 67% of demand.
What do buyers complain about in phentermine weight loss pills?
Top complaints mined from reviews: Functionality-Overall, Weight Loss, Side Effects. The return rate is 0.0%.
What does it cost to enter the phentermine weight loss pills niche?
Listings span $13.58–$64.44; the average listing price is $34.30 (sweet spot $15–$100). The average incumbent carries 6,076 reviews — the moat a new listing must climb.