Is saccharomyces boulardii profitable to sell on Amazon United Kingdom?

The niche generates £241K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -10.1%. Flapen's verdict: Skip it (47/100).

How competitive is the saccharomyces boulardii niche?

8 brands and 52 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 93% of demand.

What do buyers complain about in saccharomyces boulardii?

Top complaints mined from reviews: Acid Regulator/Stomach Ache Relief, Value For Money, Side Effects. The return rate is 0.0%.

When does demand for saccharomyces boulardii peak?

Demand peaks in Jun; the busiest month runs 1.7× the quietest.

What does it cost to enter the saccharomyces boulardii niche?

Listings span £6.99–£27.55; the average listing price is £17.46 (sweet spot $15–$100). The average incumbent carries 407 reviews — the moat a new listing must climb.

saccharomyces boulardii

Skip it

A concentrated shelf (top 5 take 90% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible13.9%

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

Avg price

Great£17.46

avg listing price — sweet spot $15–$100

Review moat

Great407.11

avg incumbent reviews — the moat a new listing must climb

Price range

Good£6.99–£27.55

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

Market size

Okay£241K

£241K/yr · 99K searches

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Bad-10.1%

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

Brand share

Bad93%

top-5 brand share — brand-locked demand

Competition

Bad90%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United Kingdom niche tracking, saccharomyces boulardii is a £241K/yr Amazon United Kingdom market (99K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Jun. Verdict: Skip it — 47/100.

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

saccharomyces boulardii market data

Units sold / yr: 10K–13K; avg 1,250–1,500/product
Revenue / yr: £175K–£218K; units × avg price
Conversion rate: 13.9%
Avg BSR: #25
Page quality: 0%
Prime: 100%
Sponsored: 89%
Out of stock: 1.7%
Avg brand age: 69 months
Avg seller age: 161 days

Competition & brand share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

Optibac Probiotics52%
swiss bioenergetics18%
Bio-Kult12%
ALPHA018%
Time Health3%
Natures Zest3%
Open — no brand owns it (2 brands, 4%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.1% search growth over the last 90 days.

Peak months: Jun · busiest ÷ quietest = 1.7×

Open Trend

Top saccharomyces boulardii search terms

saccharomyces boulardii52K/yr -8.5%10.5% conv.
s boulardii11K/yr -9.7%11.8% conv.
saccharomyces boulardii probiotic11K/yr -28.4%10.4% conv.
optibac saccharomyces boulardii7K/yr +8.3%15.3% conv.
florastor6K/yr +5.0%4.3% conv.
s boulardii probiotic5K/yr -9.4%13.7% conv.
optibac s boulardii4K/yr -20.3%23.0% conv.
florastor probiotics3K/yr -26.7%1.4% conv.

All search terms

Top saccharomyces boulardii 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

Optibac Saccharomyces Boulardii - Vegan Digestive Supplement with 5 Billion Live Cultures - Most Trusted & Recommended Brand - 40 Capsules

Optibac Probiotics£16.314.6★1,110 rev

Saccharomyces Boulardii 5 Billion CFU 90 Capsules - No Refrigeration Required - High Strength Non-Colonising Yeast with synergistic Olive Leaf Biotin and Vitamin D3

swiss bioenergetics£12.814.6★813 rev

Optibac Saccharomyces Boulardii - Vegan Digestive Supplement with 5 Billion Live Cultures - Most Trusted & Recommended Brand - 80 Capsules

Optibac Probiotics£27.554.6★1,110 rev

Bio-Kult S. Boulardii + Vitamin D3 Saccharomyces Boulardii Yeast with Preplex Prebiotics for Gut & Immune Support Resilient Live Yeast Culture Suitable for Travel & Antibiotics 30 Capsules

Bio-Kult£6.994.4★292 rev

Saccharomyces Boulardii 5 Billion CFU 90 Vegan Capsules - No Refrigeration Required - High Strength Non-Colonising Yeast by Alpha01

ALPHA01£7.504.8★19 rev

Newest

by launch date

Invivo Bio.Me Saccharomyces Boulardii Probiotics Supplement Targeted Gut Microbiome Support Probiotic Clinically Informed Probiotics for Women and Men Digestive Health

invivo£23.328 rev

10mo ago

Saccharomyces Boulardii - 6 Billion CFU - Vegan - 120 Caps - UK Made

Time Health£17.90136 rev

2y ago

Natures Zest Saccharomyces Boulardii 20 Billion CFU 120 High Strength Vegan Capsules | 4 Month Supply Live Cultures with FOS Fibre Men & Women UK Made

Natures Zest£21.54142 rev

6y ago

Bio-Kult S. Boulardii + Vitamin D3 Saccharomyces Boulardii Yeast with Preplex Prebiotics for Gut & Immune Support Resilient Live Yeast Culture Suitable for Travel & Antibiotics 30 Capsules

Bio-Kult£6.99292 rev

6y ago

Saccharomyces Boulardii 5 Billion CFU 90 Capsules - No Refrigeration Required - High Strength Non-Colonising Yeast with synergistic Olive Leaf Biotin and Vitamin D3

swiss bioenergetics£12.81813 rev

7y ago

What buyers say about saccharomyces boulardii

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

What buyers love

Acid Regulator/Stomach Ache Relief13%

“Helped my stomach a lot”

Quality-Overall12%

“the quality appears consistent”

Value For Money12%

“it feels like fair value”

Efficiency9%

“Effective”

Regulates Digestion9%

“Helps keep digestion”

Nutritional Content6%

“Great quality probiotic”

Ease Of Use4%

“Easy to take”

Ease Of Chewing/Swallowing3%

“Really easy to swallow which is great”

Soft Feel2%

“Feel good”

Fever Relief2%

“didn't get sick so there you go”

What buyers complain about

Acid Regulator/Stomach Ache Relief11%

“My stomach has started to settle down now”

Value For Money9%

“They used to be cheaper to purchase on here”

Side Effects8%

“Probably my fault for not reading side effects”

Regulates Digestion8%

“Had to stop using these as they caused severe constipation”

Functionality-Overall7%

“Didnt work for me”

Size-Overall4%

“The capsules are slightly larger than other brands I have tried”

Dosage3%

“As a result shes on 10 tablets a day which cause havoc to her system”

Vitamin2%

“Not sure about the need of vitamin D”

Touch/Button Controls2%

“Unfortunately I hit the wrong button when I submitted the delivery feedback”

Allergies2%

“having suffered with bloating for many years now”

Common questions

Is saccharomyces boulardii profitable to sell on Amazon United Kingdom?: The niche generates £241K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -10.1%. Flapen's verdict: Skip it (47/100).
How competitive is the saccharomyces boulardii niche?: 8 brands and 52 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 93% of demand.
What do buyers complain about in saccharomyces boulardii?: Top complaints mined from reviews: Acid Regulator/Stomach Ache Relief, Value For Money, Side Effects. The return rate is 0.0%.
When does demand for saccharomyces boulardii peak?: Demand peaks in Jun; the busiest month runs 1.7× the quietest.
What does it cost to enter the saccharomyces boulardii niche?: Listings span £6.99–£27.55; the average listing price is £17.46 (sweet spot $15–$100). The average incumbent carries 407 reviews — the moat a new listing must climb.