He is referring to post cycle support, a product from Anabolic Innovations.
If you are not going to run a SERM, WHICH I DO NOT AND FOR GOOD REASON, you are going to want:
1. Anti-estrogen i.e. ATD, 6-oxo, BUT preferrably Formestane(4-oha), Trans-resveratrol
2. Natural Test boosters (multiple kinds simultaneously is best), i.e. 6-bromo, urtica dioica, avena sativa, etc.
3. Cortisol suppressor i.e. DS Lean Xtreme, IBE X-lean, AX Retain/Retain2
4. Liver products/detoxifiers i.e. Garden of Life Whole Body Cleanse, 2 week liver cleanse, etc.
Some good PCT products(in my opinion) include but are not limited to:
Myogenix Hardcore Test
Diesel Test Hardcore
Neogenix Regensen
Neogenix Supremacy
Neogenix Amplitude
AX Hyperdrol
AX PCT(controversial methyl ATD)- but has worked for many users
DS Activate/Activate Xtreme
AX Rebound XT(ATD)
6-oxo
Bulk formestane