…from an on-line calculator. If you were to inject 100mg of TestCyp (with a 7day half-life) then on day 8, so seven days later, you would/should still have 50mg in your system (see below)

Day 1: 100mg T, 0mg E/D/TInjection Day

Day 2: 90.6mg T, 0mg E/D/T

Day 3: 82mg T, 0mg E/D/T

Day 4: 74.3mg T, 0mg E/D/T

Day 5: 67.3mg T, 0mg E/D/T

Day 6: 61mg T, 0mg E/D/T

Day 7: 55.2mg T, 0mg E/D/T

Day 8: 50mg T, 0mg E/D/T

Day 9: 45.3mg T, 0mg E/D/T

Day 10: 41mg T, 0mg E/D/T

Day 11: 37.1mg T, 0mg E/D/T

Day 12: 33.6mg T, 0mg E/D/T

Day 13: 30.5mg T, 0mg E/D/T

Day 14: 27.6mg T, 0mg E/D/T

Day 15: 25mg T, 0mg E/D/T

Day 16: 22.6mg T, 0mg E/D/T

Day 17: 20.5mg T, 0mg E/D/T

Day 18: 18.6mg T, 0mg E/D/T

Day 19: 16.8mg T, 0mg E/D/T

Day 20: 15.2mg T, 0mg E/D/T

Day 21: 13.8mg T, 0mg E/D/T

Day 22: 12.5mg T, 0mg E/D/T

Day 23: 11.3mg T, 0mg E/D/T

Day 24: 10.3mg T, 0mg E/D/T

Day 25: 9.3mg T, 0mg E/D/T

Day 26: 8.4mg T, 0mg E/D/T

Day 27: 7.6mg T, 0mg E/D/T

Day 28: 6.9mg T, 0mg E/D/T

Day 29: 6.3mg T, 0mg E/D/T

Day 30: 5.7mg T, 0mg E/D/T