Should I take HCG drops while on my period?

Per Pounds & Inches, women are to stop taking HCG when their monthly cycle begins. In the past, it was thought that this only applied to women using prescription HCG injections. We now believe that women using HCG drops may also benefit from stopping their doses during their cycle, but it is not required.  However, if you would prefer to do so, we recommend that you stop for just the first 3 days of your period while continuing with VLCD. On the 4th day, resume taking your drops as normal ensuring that you complete a minimum of 21 days of HCG+VLCD.