@Lillibby just a quick update for you regarding Type II diabetes and carbs - it is not the starches/carbs that cause Type II diabetes it is the oils and the high fat content on our diets that does so - you can check out the research out there on various websites including the Physician's Committee and Dr Neal Barnard etc - fat in our cells in our bodies block the ability of insulin to do the work of changing sugars into glucose for our body to use and therefore the sugars stay in the blood which leads to high blood sugar levels.... so it isn't the starches that you should cut out it is the oils and the high fat content foods - good starches like potatoes, and whole grains, brown rice, etc are a good source of energy - it is processed foods like donuts which are a combo of starch/sugar/oil that are called "carbs" that are the issue and it isn't the flour in the donut that is the issue, nor is it really the sugar, it is the oil/sugar combo
our bodies need fats and you can get that from whole foods like avocado, nut butters, tahini, nuts and seeds (in moderation) and it is possible to recover from Type II diabetes by cutting back on the oils/fats, maybe you can pass this info to your FIL and see if it is helpful to him - he should inform his doctor as he may need to gradually cut back on any medications that he may be taking for his diabetes
here is a link to Dr Barnard's webpage on the topic
Diabetes
Emma JC