Even after taking your diet properly , you don't feel energised you may
have  to take the support of medicines . there are certain diseases
which weakens the body  , only diet cannot restore strength . Medicines
are required as a supplement .
Like kidney problems , my farher suffered from this problem . It had
made him very weak . The doctor's prescribed Alitraq to him . after
taking the medicine he has regained strength .It is really a good
medicine and it is available online also :
http://www.drugdelivery.ca/s332-s-ALITRAQ.aspx