Jason Fung examines cancer screening beyond tumor size
His three-upload week pairs a liquid-biopsy analysis with questions about fasting glucose and insulin.
Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.
New Cancer Screening advances
Next story: Jason Fung takes calorie counting back to the hunger question
Things we can learn from the video
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- 1:50False alarms can lead to invasive biopsies, while routine screening covers only certain cancers.
- 6:20Fung argues that early spread matters more than tumor size when evaluating screening approaches.
- 7:20Galleri looks for cancer signals in circulating DNA through a blood test.
- 9:23Fung reports unchanged combined stage 3 and 4 diagnoses, but fewer stage 4 diagnoses in the NHS-Galleri trial.
- 14:20Fung says he has no financial ties to GRAIL, the company behind Galleri.
Jason Fung's biggest new audience gathered around cancer screening, rather than the fasting questions that fill much of his archive. "New Cancer Screening advances" has drawn about 47,000 views, the most of his three uploads this week.
The analysis turns on a distinction Fung considers crucial: finding a tumor is not the same as identifying cancer before it spreads. He examines false alarms and unnecessary biopsies, then introduces the Galleri blood test, which looks for cancer signals in circulating DNA.
His account of the NHS-Galleri trial includes an important qualification: combined stage 3 and stage 4 diagnoses showed no change, while stage 4 diagnoses alone fell by 14%. Fung treats that shift as encouraging, rather than a clean sweep for the technology. He also says he has no financial ties to GRAIL, the company behind the test.
Viewers are asking about the treatment behind the survival differences he discusses, while others focus on liquid biopsies and cancers without routine screening options.
The other uploads return to familiar metabolic territory. "Why Blood Sugar Rises while Fasting (Don't Panic!)" explains Fung's account of stored glucose entering the bloodstream. His newest video, "They ate 300 fewer calories and gained 20 pounds. Here's why.", uses a study involving increased insulin doses to make his argument about hormones and weight gain. It currently has the strongest daily viewing momentum of the three, though it has only just arrived.
Across the channel, daily views are approaching twice their usual level. The subscriber count held steady over the week, leaving this a busier viewing stretch without a corresponding rise in subscribers.
Published on Trari
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What viewers say
Please discuss the treatment plan involved for Stage 3 cancers that lead to the improved survival rates.
@TIGER300RTSee it on YouTubeLiquid biopsy technology could be a major step forward in detecting cancers earlier, especially those that have traditionally been difficult to screen for.
@QvfrrWilliamsSee it on YouTube
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The videos drawing views on Jason Fung right now
- Channel
- Jason Fung
- Subscribers
- 1,460,000
- Channel views, last 7 days
- 264,891
- Videos published this week
- 3
- Video published
- November 9, 2026
- Video views so far
- 47,269
- Views on its first day
- 18,014
The numbers
Here is how Jason Fung's uploads and audience moved over the week.




