Can Myo-Inositol Delay a Period?
Myo-inositol is not generally known for causing delayed periods as a standard side effect. In fact, in PCOS discussions it is more often used with the goal of supporting cycle regularity and ovulation. But that does not mean every person will see a perfectly predictable cycle after starting it. Hormonal patterns can shift, and if ovulation timing changes, the timing of a period can change too. (PubMed)
This is especially true in PCOS, where cycles may already be irregular before any supplement is added. If someone starts myo-inositol and then sees a later period, that does not prove the supplement directly caused a delay. The cycle may already have been unstable, or ovulation may have shifted later in the month. If pregnancy is possible, that also needs to be considered first. (PubMed)
So the honest answer is not “yes” or “no” in a simple way. Myo-inositol is not mainly associated with delaying periods, but cycle timing can change while the body adjusts, especially in women who already have irregular cycles. A late period should be interpreted in context, not blamed automatically on the supplement. (PubMed)
The short answer is this: myo-inositol is not known as a typical cause of delayed periods, but cycle timing can shift, especially in PCOS. If a period is very late, pregnancy or another hormonal issue should be checked. (PubMed)