Stacking
No combination of steroids is safe. Fewer compounds at moderate doses is always preferable. The safest cycle is testosterone only.
Always include a testosterone base. All other steroids suppress natural production. Without exogenous testosterone you will experience fatigue, depression, loss of libido, and muscle loss. Minimum TRT dose (100-200mg/week).
Avoid
Testosterone + Trenbolone. Extreme side effects, mental health impact.
Any stack with two oral steroids. Compounded liver toxicity.
Trenbolone + Nandrolone. Combined 19-nor suppression, very difficult recovery.
Hard rules
Always include a testosterone base
Never stack two oral steroids
Limit orals to 4-8 weeks maximum
Get blood work before, during, and after
First cycle = testosterone only
Have PCT planned before you start