Surgical Anaesthesia side-effects largely exhibit side effect symptoms which are SHOCK-like. Nausea, vomiting, confusion, etc are all symptoms of mild shock. 
Also, some folk can die under anaesthesia with medical shock being the primary cause of death.

Anything which creates 'shock' -in any degree,  represents a serious threat to the life-force or Pranic energies of the body. Indeed shock succeeds in separating the aetheric body (or Body-double) from the physical body. This separation if complete represents a drastic withdrawal of the Aetheric body from the physical cells thereby with drawing the Life force from the cells. Our inference here suggests that the aetheric body is a prime access route from the subtle to the physical OR pranic forces to enter the pysical cells.

Further subtle body complications of shock are not well understood by many, however we suggest that the aetheric body not only penetrates the physical BUT that it is a 'grid-like' structure too, with a healthy aetheric body exhibiting a finely woven, closely bound grid-like structure. Shock then not only weakens its hold on the physical cells, it succeeds in separating the grid-like structure weakening the aetheric body density over a particular area of the body or the whole body- as the case may be.

So, how does this effect healthy weight loss?

If the aetheric body is weakened in cellular penetration capacity OR aetheric density this severely limits your body in forming a strong muscle to fat ratio whilst you're losing your weight when sticking to the Pranic diet as expounded here