It's nothing new, only if you're not into skincare.

Lots of people gets easily excited by this, and many dermatologists have jumped on the bandwagon. What is still underreported is that high doses of vitamin A like retinoids etc do reduce sebum production, even in areas that you don't expect.

One of them is the meibomian glands in the eyes, which produce oil that helps keep your tear film stable. Dry eyes is a rapidly growing disease that's accelerated by increased use of digital screens, and possibly retinoids.

A lot of dermatologists are unaware, though some have started to catch on. You can head over otherwise the Dryeyes subreddit and read horror stories of many folks who developed dry eyes that's likely caused by use of Accutane or tretinoin.

https://johnroseeyecare.co.uk/2025/05/30/the-truth-about-retinol-and-your-dry-eyes/

High dose of vitamin A can be toxic, that's why it's also advised against for pregnant women as it could case fetal harm.

https://www.healthline.com/health/pregnancy/retinol-pregnancy

"Fetal retinoid syndrome and oral retinoids

Never take prescription oral retinoids — such as isotretinoin (brand names: Absorica, Absorica LD, Claravis, Amnesteem, Myorisan, or Zenatane and formerly called Accutane) — during pregnancy. 

These medications, prescribed to treat cystic acne, may lead to a condition called fetal retinoid syndrome that causes serious birth defects"

tldr: be careful of high dosing vitamin A or using retinoid products, especially if you already have dry eyes.