Boiled coffee in a pot contains high levels of the worst of cholesterol-elevating substances. Coffee from most coffee machines in workplaces also contains high levels of cholesterol-elevating substances. However, regular paper filter coffee makers filter out most of these substances, finds study.

[u/mvea]

https://www.uu.se/en/press/press-releases/2025/2025-03-21-cholesterol-elevating-substances-in-coffee-from-machines-at-work

[u/dftba-ftw]

From what I could tell from the literature, if it is unfiltered, yes it can have a significant impact on LDL even at low doses around 2-3 cups. Which can be anywhere from 8oz to 24oz depending on if the research was using 8oz to a cup or the historical 4-6oz in a "cup of coffee"

[u/AbareSaruMk2 → u/dftba-ftw]

Definitely only in the 2-3 cups range. But will try filtering it or at least pouring through a filter in that case.

[u/florinandrei → u/dftba-ftw]

The amount of water is irrelevant, what matters is the amount of coffee that goes in it. Normally that's about 10 grams per serving.

[u/dftba-ftw → u/florinandrei]

Preparing coffee is dosed by mass of both grounds and water, like 2g/fl.oz of water (for example - what I do when making an aeropress or a pourover) which means the coffee all has the same concentration of these LDL raising compounds per oz, so a 4oz "cup of coffee" has less of these compounds than an 8oz cup.

If the report concludes that participants drinking 1 cup of coffee a day saw no risk but those drinking 2 or more did then it very much matters on if the researchers are defining a "cup or coffee" as 8oz or 4oz.

[u/windowpuncher → u/florinandrei]

Wrong - the amount of water effects the extraction rate of the coffee. If you try to brew 10g of coffee with 500ml of water it's going to be thin but also super sour and really disgusting, because more of the volatiles in the coffee have been extracted versus using less water.