Doctor’s Best vs Now Foods:Which is more popular?
In September 2026, Now Foods had more branded searches than Doctor’s Best among magnesium supplement brands worldwide. Now Foods had about 6,700 branded searches, while Doctor’s Best had 4,400. Now Foods made up 6.1% of all magnesium supplement brand searches we track, and Doctor’s Best accounted for 4%. When we asked ChatGPT and Google AI Overviews about magnesium supplement brands, Doctor’s Best and Now Foods each appeared in one of the four answers. Doctor’s Best and Now Foods were each mentioned first in one of the two answers that named either.
Who do people search for more?
Now Foods, about 52% more searches than Doctor’s Best
Who does AI mention more?
Both were mentioned in 1 of 4 answers.
Who does AI recommend more?
Each is named first in 1 of 2 answers.
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Top magnesium supplement brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and one Google AI Overview, Doctor’s Best and Now Foods were each mentioned in one out of four: in one of the three ChatGPT answers, but not in the Google AI Overview. Doctor’s Best and Now Foods were each listed first in one of the two answers that named either.
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.
Thorne4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
Pure Encapsulations3 of 4Named in 2 of 3 ChatGPT answersNamed in 1 of 1 Google answers
Nature Made2 of 4Named in 2 of 3 ChatGPT answersNamed in 0 of 1 Google answers- Now Foods1 of 4Named in 1 of 3 ChatGPT answersNamed in 0 of 1 Google answers
Doctor’s Best1 of 4Named in 1 of 3 ChatGPT answersNamed in 0 of 1 Google answers
Life Extension1 of 4Named in 0 of 3 ChatGPT answersNamed in 1 of 1 Google answers
Natural Calm0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
BiOptimizers0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
Nature's Bounty0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
Moon Juice0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
See every answer about magnesium supplement brands
4 answers
Asked ChatGPT
“Which magnesium supplement brand should I buy?”
Asked ChatGPT
“What are the best magnesium supplement brands?”
Asked ChatGPT
“What's the best magnesium supplement brand for sleep?”
Searched Google, AI Overview
“magnesium supplement”
Google showed no AI Overview for this search.
Searched Google, AI Overview
“best magnesium supplement”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 22, 2026.
Is Doctor’s Best or Now Foods more popular in search?
This chart shows how often people search Google for Doctor’s Best and Now Foods by name. Each line represents a brand's share of searches for all 12 magnesium supplement brands we track, month by month, from English-language searches worldwide.
Share of searches by month for Now Foods, Doctor’s Best. The figures are in the table below the chart.
View monthly share of searches table
| Month | Natural Calm | Nature Made | BiOptimizers | Thorne | Now Foods | Pure Encapsulations | Nature's Bounty | Doctor’s Best | Life Extension | Moon Juice | Ancient Minerals | Jigsaw Health |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 38.5% | 13.1% | 12.7% | 7.2% | 5.9% | 3.9% | 5.9% | 4.8% | 3.2% | 2.1% | 2.1% | 0.52% |
| Nov 2025 | 36.2% | 12.2% | 13.6% | 8.1% | 6.7% | 4.4% | 5.4% | 5.4% | 2.9% | 2.4% | 1.9% | 0.59% |
| Dec 2025 | 38.5% | 12.9% | 11.8% | 7.1% | 5.8% | 4.7% | 5.8% | 5.8% | 3.1% | 2% | 2% | 0.63% |
| Jan 2026 | 37.5% | 15.1% | 11.3% | 6.8% | 5.6% | 5.5% | 5.5% | 5.5% | 3% | 2% | 1.6% | 0.49% |
| Feb 2026 | 39.3% | 16.1% | 9.8% | 7.2% | 6% | 4.8% | 4.8% | 4.8% | 3.2% | 1.7% | 1.7% | 0.43% |
| Mar 2026 | 35.6% | 17.9% | 10.9% | 8% | 5.7% | 4.4% | 5.3% | 5.3% | 2.9% | 1.9% | 1.5% | 0.48% |
| Apr 2026 | 35.2% | 18% | 10.9% | 9.8% | 5.7% | 4.4% | 4.4% | 5.4% | 2.9% | 1.3% | 1.5% | 0.48% |
| May 2026 | 32.7% | 20.1% | 10% | 9% | 6.4% | 4.9% | 4.9% | 4.9% | 3.3% | 1.7% | 1.7% | 0.44% |
| Jun 2026 | 33.2% | 20.7% | 10.3% | 9.2% | 6.3% | 5% | 5% | 4.1% | 2.7% | 1.5% | 1.5% | 0.45% |
| Jul 2026 | 32.8% | 20.2% | 10% | 9% | 6.1% | 6% | 4.9% | 4% | 3.3% | 1.7% | 1.5% | 0.44% |
| Aug 2026 | 32.5% | 20.3% | 10.1% | 9.1% | 6.1% | 6% | 4.9% | 4% | 3.3% | 1.7% | 1.5% | 0.44% |
| Sep 2026 | 33% | 20.4% | 10.1% | 9.1% | 6.1% | 6.1% | 5% | 4% | 2.7% | 1.7% | 1.5% | 0.44% |
How has the Doctor’s Best and Now Foods comparison changed over the last 12 months?
3 findings
- Now Foods was ahead of Doctor’s Best in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Doctor’s Best’s share of searches among magnesium supplement brands worldwide moved from 4.8% to 4%, and its estimated monthly branded searches moved from 5.4K to 4.4K.
- Across the 12 months ending September 2026, Now Foods’ share of searches among magnesium supplement brands worldwide moved from 5.9% to 6.1%, and its estimated monthly branded searches held steady at 6.7K.
How did search popularity change for magnesium supplement brands worldwide in September 2026?
1 change
Estimated monthly branded searches for Doctor’s Best worldwide fell 18.5% over 12 measured months, from 5.4K to 4.4K in September 2026.
How are branded searches counted?
3 search terms
Brandwave collects information about searches that people make online using Doctor’s Best’s and Now Foods’ 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.
Doctor’s Best
1 branded search term
- doctors best magnesium
Now Foods
2 branded search terms
- now foods magnesium
- now magnesium
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