A good brand of thiamine? I would go for the lipothiamine or allithiamine made by cardiovascular research ltd, or ecological formulas ltd. Unfortunately, it will need to come from ebay, or you will need to ship it from the US - which can drive import fees. I am looking into other alternatives to see if it will be possible to distrubute from the UK, though. So there may be a UK supplier in the future!
I think it is generally better to cook anything in the oven, rather than frying it. The high temperatures are pretty detrimental for nutrients in food, and the temperature in the oven is not likely to reach the heat that you would get from a hot pan. However, this does NOT mean that I recommend oven cooking steaks
- they should be barbecued or fried.
If you experience muscle wasting, you may do well to add in a third meal or properly track your calories through an online calorie calculator. It is easy to under eat on low carb/keto.
Are you sure Malate was recommended before sleep? Because Malate is a chelate with malic acid, which is a component of the Kreb's cycle in energy production, and is usually used to give someone energy.
The various forms of magnesium are basically elemental magnesium bound with a nutrient of some kind. Malate, as I said above is usually used to battle fatigue. Citrate provides citric acid, but can also be used as a laxative. Threonate is usually used to get magnesium into the central nervous system, whereas glycinate is calming and also has an inhibitory effect on the nervous system. The one to avoid is magnesium oxide, because of its poor bioavailability. Glycinate, threonate, or malate are generally the best absorbed.
Almond oil is likely not an issue since oxalic acid is very low in oils. In general, I would not be too concerned about eating beetroot in small quantities as long as its not at every meal, or excessive amounts. People who are sick should do their best to avoid excess oxalates, because they are practically universally detrimental for someone with leaky gut, autoimmunity, etc. This does not mean completely cutting all oxalate containing foods out 100%, but rather limiting them, and definitely NOT using things like almond flour or amaranth etc.