Studies in pregnant rats have shown embryofetal mortality, structural abnormalities, and alterations to growth when administered during organogenesis at maternal exposures below the maximum recommended human dose (MRHD)
The insulin resistance in PCOS might also occur independently of body weight, due to inherited post-receptor defects in insulin signalling that affects metabolism and mitotic pathways, not only in classic insulin target tissues, such as skeletal muscle, liver, and adipose tissue, but also in the non-classical target tissues, such as pituitary and ovary [12, 16]
That design is common in trials comparing agents with different administration requirements, but it can influence reported outcomes, particularly subjective ones such as appetite and gastrointestinal symptoms
Beyond the systemic regulation of NAD + homeostasis across various tissues, it has recently been described that bacteria contribute to mammalian host NAD + biosynthesis, especially following oral intake of the amidated precursors