I've just been taking the EPO for the first time this cycle. I started it CD1 and since CD8 started getting amazing EWCM. I haven't had mucus like this since I was in my 20s and I'm 41, I can't believe it. I'm taking the Boots own brand, 3000mg daily, the maximum dose (recommended dose is 1000mg to 3000mg daily). I thought it might take a couple of months to build up but it's worked within only one week. Trying for a Christmas BFP. I can really recommend this supplement as up until now I've been so dry, only getting one day of EWCM, and not that much per cycle. Also I've been taking the fresh grapefruit juice for months now and it's not made any difference whatsoever. If you have a problem making fertile cervical mucus give it a go!