There is no such thing as zero body fat. A certain amount of fats is healthy and necessary. The brain is made mostly of fats.
No. Fat is the form in which fat is stored.
Steroids
You cannot weigh 275 pounds at 6 percent body fat without them. No human ever has had his proportions and size without them. So its a fair bet to say he does or has done them...
Yes, it is possible to simultaneously lose fat and gain muscle while using steroids, as steroids can help increase muscle mass and reduce body fat. However, it is important to note that the use of steroids can have serious health risks and side effects, and should only be used under the supervision of a medical professional.
No, the testosterone however can be steroids
Online Body Fat calcuator or fat calipers.
My body fat is zero
No. Body fat without any calorie surplus is not possible.
Actually, steroids can cause weight gain.
It depends what kind of steroid you are using. Highly androgenic steroids that convert readily into oestragen will cause you to retain water and gain body fat, Steroids that do not convert to oestragen Can and most likely will help whoever is using them to lean up quite a bit e.g Stanazolol and Anavar.. But they are not miricle workers and you still need to diet and exersice correctly if you would like to see good results. Be safe!!
no
If the body doesn't take in enough fat then the vitamins in the body will not work properly. Without fat the body would have no padding and insulation for organs.