Bio-Kult vs Radiance:Which is more popular?
In September 2026, Radiance had more branded searches than Bio-Kult among probiotic brands worldwide. Radiance had about 90,500 branded searches, while Bio-Kult had 22,200. Radiance made up 4.5% of all probiotic brand searches we track, and Bio-Kult accounted for 1.1%. When we asked ChatGPT and Google AI Overviews about probiotic brands, neither Bio-Kult nor Radiance appeared in any of the five answers.
Who do people search for more?
Radiance, about 4 searches for every 1 for Bio-Kult
Who does AI mention more?
Both were mentioned in 0 of 5 answers.
Follow Bio-Kult vs Radiance and get free monthly updates on what changed
By continuing you'll get index updates and occasional product news from Brandwave. Unsubscribe any time. Privacy
Top probiotic brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, neither Bio-Kult nor Radiance showed up in any of the five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Florastor3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Align3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Culturelle3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Garden of Life1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Yakult0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
BLIS0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
BioGaia0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Blackmores0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Seed0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Bio-Kult0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about probiotic brands
5 answers
Asked ChatGPT
“Which probiotic brand should I buy?”
Asked ChatGPT
“What are the best probiotic brands?”
Asked ChatGPT
“What's the best probiotic brand for gut health?”
Searched Google, AI Overview
“probiotic for gut health”
Searched Google, AI Overview
“probiotic supplements”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Bio-Kult or Radiance more popular in search?
This chart shows how often people search Google for Bio-Kult and Radiance by name. Each line represents a brand's share of searches for all 12 probiotic brands we track, month by month, from English-language searches worldwide.
Share of searches by month for Radiance, Bio-Kult. The figures are in the table below the chart.
View monthly share of searches table
| Month | Yakult | BLIS | BioGaia | Blackmores | Seed | Florastor | Radiance | Align | Culturelle | Garden of Life | Bio-Kult | Optibac |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 31% | 20.7% | 16.9% | 7.6% | 4.8% | 4.2% | 5.1% | 2.8% | 2.3% | 2.3% | 1.5% | 0.83% |
| Nov 2025 | 28.1% | 23% | 15.4% | 8.4% | 5.2% | 3.8% | 5.6% | 3.1% | 2.5% | 2.5% | 1.4% | 0.92% |
| Dec 2025 | 24.3% | 24.3% | 16.3% | 8.9% | 4.7% | 4.9% | 6% | 3.3% | 2.7% | 2.2% | 1.5% | 0.98% |
| Jan 2026 | 24.5% | 24.5% | 16.4% | 7.4% | 5.6% | 4% | 6% | 3.3% | 3.3% | 2.2% | 1.5% | 1.2% |
| Feb 2026 | 29.2% | 19.5% | 16% | 7.2% | 5.5% | 4.8% | 5.8% | 3.9% | 3.2% | 2.2% | 1.4% | 1.2% |
| Mar 2026 | 30.8% | 20.6% | 13.8% | 7.5% | 5.8% | 5% | 5% | 3.4% | 3.4% | 2.3% | 1.5% | 1% |
| Apr 2026 | 31.4% | 21% | 14% | 9.4% | 5% | 4.2% | 5.1% | 2.8% | 2.8% | 1.9% | 1.3% | 1% |
| May 2026 | 32% | 21.4% | 14.3% | 7.8% | 5.2% | 4.3% | 5.2% | 2.9% | 2.9% | 1.9% | 1.3% | 0.86% |
| Jun 2026 | 29.6% | 19.8% | 16.2% | 8.9% | 5.8% | 4.9% | 4.9% | 3.3% | 2.7% | 1.8% | 1.2% | 0.97% |
| Jul 2026 | 26.9% | 22% | 18% | 9.8% | 5.3% | 4.4% | 4.4% | 3% | 2.4% | 1.6% | 1.1% | 0.89% |
| Aug 2026 | 27.1% | 22.2% | 18.1% | 9.9% | 5.3% | 4.5% | 4.5% | 3% | 2% | 1.6% | 1.1% | 0.89% |
| Sep 2026 | 27.1% | 22.2% | 18.1% | 9.9% | 5.2% | 4.5% | 4.5% | 3% | 2% | 1.6% | 1.1% | 0.89% |
How has the Bio-Kult and Radiance comparison changed over the last 12 months?
3 findings
- Radiance was ahead of Bio-Kult in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Bio-Kult’s share of searches among probiotic brands worldwide moved from 1.5% to 1.1%, and its estimated monthly branded searches moved from 33.1K to 22.2K.
- Across the 12 months ending September 2026, Radiance’s share of searches among probiotic brands worldwide moved from 5.1% to 4.5%, and its estimated monthly branded searches moved from 110K to 90.5K.
How did search popularity change for probiotic brands worldwide in September 2026?
2 changes
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Bio-Kult’s and Radiance’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Other head-to-heads among probiotic brands
Put your own brand in this comparison
Brandwave tracks your branded demand next to the rival you actually watch, with your campaigns, spend and outcomes on the same timeline.