Yet this isn't even the crazy part of it.
The authors returned and assessed their cholesterol five days later, and then 30 days later. Now, keep in mind that they haven't eaten Brazil nuts all this time. I had only one helping of Brazil nuts a month ago, and their cholesterol was still down 30 days later. It went down and stayed down, having eaten just four nuts, that's nuts!
And no, the research was not financed by the Brazil nut industry.
Ironically, in fact, four nuts seemed to work faster than eight nuts to lower bad cholesterol and raise good cholesterol. Such results suggest that eating just four nuts could be enough to raise the levels of LDL and HDL for up to 30 days, and maybe longer— no more than 30 days.
Now, usually, when a study is published in the medical literature showing some a too-good-to-be-true result like this, you want to wait to see the results repeated before you change your clinical practice before you prescribe something to your patients, particularly when the study is done on only ten people, and especially when the findings are simply just too amazing to believe. But if action is inexpensive, simple, harmless, and healthy— eating four Brazil nuts a month— then, in my view, the burden of proof is kind of reversed. I believe the rational default position is to do so until it has been proved otherwise.
According to the American Heart Association (AHA), the use of monounsaturated fats or polyunsaturated fats instead of saturated or trans fats help improve cholesterol levels, which reduces the risk of heart disease and stroke.
Brazil nuts also contain dietary fiber. AHA states that consuming fiber-rich foods increase blood cholesterol levels and decrease the risk of heart disease, stroke, obesity, and type 2 diabetes.
The results of the 2019 study showed that higher consumption of tree nuts decreased the risk of cardiovascular disease and heart attack among people living with diabetes.