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Joe Rogan yells "Holy sh*t!" after Harvard professor of genetics David Sinclair says sudden blindness has DOUBLED because of GLP-1 drugs.

Then Rogan pulls up the data himself — and what he reads out loud is even worse.

SINCLAIR: "Glaucoma and also sudden blindness. It's called… pic.twitter.com/cFiTK6BKpE

— The Vigilant Fox 🦊 (@VigilantFox) August 7, 2026

Joe Rogan yells "Holy sh*t!" after Harvard professor of genetics David Sinclair says sudden blindness has DOUBLED because of GLP-1 drugs.

Then Rogan pulls up the data himself — and what he reads out loud is even worse.

SINCLAIR: "Glaucoma and also sudden blindness. It's called NAION, which is now twice as more prevalent because of the GLP-1 drugs."

ROGAN: "Really?!"

SINCLAIR: "It's not well known. Obviously companies don't want to talk about it. But yes, sudden blindness has doubled, seemingly because of these meds."

ROGAN: "Holy shit!"

SINCLAIR: "Careful."

ROGAN: "Sudden blindness has doubled because of GLP-1s?"

SINCLAIR: "Due to NAION, which is like a stroke in your eye, and then your other eye can go. Which is pretty scary. And there's nothing you can do about it. Hopefully our drug does work for those people."

ROGAN: "And, obviously correlation does not equal causation, but it seems to be."

SINCLAIR: "Yeah, there's a scientist at Harvard. You could look up his work. Joe Rizzo. It looks like it's repeatable across the planet."

ROGAN: "Wow, that's terrible. Terrible because there's so many people out there that are just telling everyone they should get on GLP-1s… Like online podcasters saying, 'Everyone should get on GLP-1s… It's going to transform society.' I'm like, 'We just started taking these! The f*ck are you saying?!'"

SINCLAIR: "Yeah, it's not risk free. Same with ED drugs."

ROGAN: "Here goes. Recent studies suggest that a potential risk — rare link between GLP-1 receptor agonist medications such as Ozempic, Wegovy, blah, blah, blah, and… an eye stroke [that] can cause sudden, painless loss of vision in one eye, while absolute risk remains very low."

ROGAN: "Well, very low is like… What does that mean?"

SINCLAIR: "One in 10,000 people."

ROGAN: "One in 10,000?"

SINCLAIR: "Oh no. Total of 10,000."

ROGAN: "Oh, total of 10,000 so far? How many people are taking this stuff?"

[Rogan continues reading]

"The drugs were 68.6 times more likely to develop this [eye stroke] and 8 times more likely to develop… diabetic retinopathy."

ROGAN: "Oh, my God. Then… Wow."

ROGAN: "Yeah, man. These things are just — they're just rolling out…"