hello j.evans, I believe that when farmers want to fatten pigs up for market, they increase the grains in their diet. Apologies for likening you to a pig, but it might work!

When I was weighed at my last health check I was 'borderline anorexic'. Like you I have always been slim, and lost more weight when I started the diet, and losing muscle mass through not being able to exercise as much doesn't help either.

It's a difficult balance, as if you fill yourself up with grains, you're not as hungry for the fruit and veg which are probably more important.