The aim is to make the stomach smaller and reduce the absorption of food.
Times, Sunday Times (2016)
Damage here could affect absorption of food.
Hanssen, Maurice & Marsden, Jill E For Additives (1987)
Many M. E. patients have problems with digestion and absorption of food.
MacIntyre, Anne M. E. Post-Viral Fatigue Syndrome - How To Live With It (1989)
If you or your doctor think you have poor absorption of food due to lack of digestive enzymes, then taking a preparation of these makes sense.
MacIntyre, Anne M. E. Post-Viral Fatigue Syndrome - How To Live With It (1989)