Hi @Lollocorra,
there was a recent thread about acne here: https://bioenergetic.forum/topic/3987/peating-vs-acne?_=1743678467834
I would recommend red light, foods with Vitamin A (liver) and zinc (oysters), for topical help maybe some niacinamide serum.
Has she checked her thyroid function (temperature, pulse, blood levels)? Problem with digestion, small intestine etc. can indicate low thyroid function.
You said she already tries to avoid starches. I think it would be best to have only well-digested carbs for a while. What people digest well is somewhat individual, but ripe fruit, fruit juice and honey are digested well by most people. That should also help with the acne. The acne and her digestive problems could very well be related. For many people their acne clears up (or at least improves significantly) with a carnivore/low carb diet. I think you can mimic the same benefits with easily digested sugars like that as your carb sources, while avoiding to bad medium to long term effects of low carb.
The carrot salad Georgi mentioned should be a good remedy for all her problems.