I may be wrong but it sounds like a load of rubbish to me!
There are loads of studies to suggest that high GI carbs can cause problems. Particularly processed white flour.
I went on to a low carb/low GI diet a while ago and I experienced loads of unexpected benefits, particularity no pain from old injuries that used to throb in cold weather.
I would recommend it. No problems with smell or other nonsense.
There is generally a lot of resistance to this sort of diet as it is almost a direct contradiction to the "standard" diet advice.
Give it a go, it certainly can't do any harm in the short term. Get some keto sticks, they will indicate when you are actually in ketosis and then you should be able to judge if it's helping or not.
This topic has been done to death on here and the high carb brigade will be along in a moment to churn out diet advice that has been developed by scientists sponsored by Nestle and Kellogs.