The recommended dosage of LGD for both men and women is 10mg/day. Taking just 5mg/day won't hurt you but to get the most out of the glycerol - I would bump it up to 10mg/day.
SARMS such as LGD are only minimally suppressive of natural testosterone production so all that is needed as a mini PCT afterwards is a good natural testosterone booster like HCGenerate ES from n2bm.com