They are all safe to be used. Silicon based or coconut oil is what has been recommended. And the answer to this and other questions about the AM can be found in the “Grow Your Own Blood Vessels” thread.
raybbaby

The big penis and mens' sexual health source, increasing penis size around the world.
February '16: 173 mm BPEL (6.81") 132 mm MEG (5.20")
November '18: 190 mm BPEL (7.48") 137 mm MEG (5.39")
Goal: A sustained 7.7" by 5.8" during intercourse
Current: BPEL: 7.5" BEG: 5.5" MEG 4.75" NBPFL: 5" FG: 4.25" BPFSL: 7.75"
Long term goal: BPEL: 8" BEG: 6" MEG 6" NBPFL: 5.5" FG: 5"
Current: BPEL: 7.5" BEG: 5.5" MEG 4.75" NBPFL: 5" FG: 4.25" BPFSL: 7.75"
Long term goal: BPEL: 8" BEG: 6" MEG 6" NBPFL: 5.5" FG: 5"