I've noticed that some people posting here are concerned with blood sugar and or type two diabetes. Whilst cholesterol is the main consideration here I think the following will have resonance with the two interests.
Prior to the mid seventies early eighties when the emphasis on dietary reform - cut fat increase carbohydrate - the following book (first published in 1917) was the standard treatment a dietician would recommend for someone with type two diabetes.
The difference in today’s diet sheets could not be more different. The link below is to pages 12 and 13 to illustrate this:
The whole book is available for free and is easiest to read on line or can be downloaded as a PDF etc. via the top left of the above page.
This diet was successful in controlling type 2 diabetes before well before Metformin came on the scene, so where on earth, one might ask, is the evidence for such a sudden volte-face?
(Incidentally Metformin was discovered in 1920, but was forgotten for the next 20 years and only was first used in the US in 1995. It’s reasonable to suppose that it wasn’t needed in those lost 20 years as a diet that cut carbohydrate to a minimum was considered sufficient by the mainstream medical establishment.)
A low carbohydrate, hight fat diet can help with those concerned with high blood pressure, lowing triglycerides and increasing HDL as well (see paragraph 'Health as a bonus'):