Diet / keeping fit
A dream about dieting may be referring to some kind of restriction upon you in waking life. In your dream, you may be carefully measuring out food and drink portions, or longing for forbidden fruit. In waking life, have you been measuring out your time or restricting how much emotion you show? Are you holding back your feelings in some way? Similarly, if you overindulged or broke your diet in some way in your dream, are your emotions out of control? Vitamin pills and dietary supplements in your dream may be referring to your health. Does your health need a boost in some way? Are you lacking variety? If you can’t decide which vitamin pill to take in your dream, then perhaps this represents the variety of possible ways in which you can reinvent yourself in real life.
If you were exercising or lifting weights in a gym in your dream, this may be referring to your body image. How easy or difficult you found the exercise may be commenting on your psychological and physical ability to complete a project in waking life.