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You should avoid eatig junk food which is the main cause of these symptoms. It reduces energy levels making you feel weak and fatigued. Eat more fresh fruits and green leafy vegetables. Drink plenty of water. Do brisk walking for 40 minutes a day. Get your blood glucose
level checked as this could also be a sign of Diabetes
. Avoid eating nutrition supplements and multivitamins unnecessarily as they will be waste for you. Instead if you take healthy diet you should be fine.