We aren't "allowed" to comment on the "medical aspects" of this but there is no way to address this topic rationally without at least coming close to that part of the discussion.coffee.me wrote:We already have one coffee+Cholesterol thread here, and I REALLY wish this thread will ONLY cover the espresso part, not the health part.
Why on earth would anyone use a paper filter in a portafilter, if it were not with the intention of filtering out something that is supposedly undesirable, in the hopes of leaving those more desirable parts of the extraction?
The obvious answer is that the experimenter is trying to filter out the oils in coffee or some part of the oils, leaving the rest of the extraction in place. And what possibly can this accomplish, one might ask?
Human lipid chemistry is a very complex subject, and what we humans consume and how it affects our measured serum lipid levels is not one of those 2+2=4 types of topics. In general, the consumption of cholesterol does not raise serum cholesterol levels much in most people, even though the consumption of other fats, especially saturated fats, will do this in some people. My emphasis is on "some" in that sentence, because we are all genetically very different, one from another.
There are people who can eat a 1lb steak every night for dinner and have almost no impact on their measured serum lipids. There are others whose measured blood lipids do respond considerably to what they ingest, and then there are many people who are intermediate in that regard. Add in the fact that many people are already taking statins or other medications to "improve" their lipid chemistries, and the subject becomes even more complicated. This is not one size fits all.
Even assuming that one could filter out the "bad stuff" from espresso with a paper filter, the questions then become what percentage of people would have any benefit from this filtering, as measured in a blood test, and what does the filtering do to the resulting beverage? If the beverage (espresso) becomes plonk, then few would want to drink it even if some peoples' blood test improves. And then of course there is the question about how does the change in the measured blood chemistry results translate into benefits to the humans who experience it (e.g. do they live longer, do they have fewer heart attacks or strokes, etc.)
Here are my guesses on these answers; few people will benefit much even in their blood tests even if the filter "works," even fewer will see any actual health benefit, and the beverage will not be positively impacted by adding a paper filter to the extraction. If one is concerned about one's risk of cardiovascular disease, methinks there are other interventions much more likely to be of benefit, than this one.
Moderator note: At original poster's request, split follow-on discussion from How to Make Decent Paper-Filtered Espresso to this thread.