I studied many different sites, including this one, before starting my current cycle. After I decided to run Epistane (basically same as HAVOC), I also looked into pulsing to see if the results were the same as a straight cycle, and if the pulsing protocol was really safer. I can see where shutdown is possibly not going to occur while pulsing, but I also read that, if you take the majority of your dose in the morning when test levels are highest, you will again reduce shutdown. In the end, I made the decision to run a straight cycle, but I stayed at a relatively low dose. I used 10 mg ED for week 1, 20 mg ED for week 2, and 30 mg ED for weeks 3 and 4. I am currently in week 4, and I am just starting to really see gains in size and strength. Because of the gains this week, I will run either 30 mg or 40 mg ED next week to see if the gains continue. IMO, I would not use a PH on a straight cycle for more than 6 weeks. This is my first cycle in 24 years, and I used old school AAS when I was 21, so I had some experience long ago. If you make the decision to pulse, and don't feel comfortable with higher doses, follow your plan and your gut and see how it goes. You may find that this is all you need to get the results you are looking for. Research is great, but ultimately you have to find out what works for you. Good luck with it - we'll be anxious to see how it goes.