Supplements are useful or necessary in some circumstances, including diagnosed deficiencies, pregnancy and conditions where a clinician recommends them. They are not automatically harmful, and food is not always a substitute for prescribed supplementation.
SPRU is a food. It can contribute nutrients to the diet, but it should not be used as a reason to stop medicines or supplements recommended by a healthcare professional.
Check with a qualified professional before changing treatment or supplementation, especially during pregnancy, breastfeeding or when taking medication.