Regarding the main objectives of the studies, the most common were improving insulin/glucose metabolism (13 studies) [30,33,34,40,44,46,50,52,58,64,69,70,72]; preventing eczema, allergic disease, or atopic sensitization (10 studies) [29,37,41,49,53,54,55,65,68,73]; improving oxidative stress status and inflammatory profile (8 studies) [14,36,46,47,48,51,64]; modifying the mother’s or infant’s microbiota (5 studies) [14,61,63,65,75]; and preventing GBS occurrence (4 studies) [45,67,71,74]. Here, INS is linked to allergic disease.