It can be found in some animal-based foods in its pre-made form, or found in plants in the form of beta-carotene -- a compound your body digests to form two vitamin A molecules. Yellow and dark green vegetables and fruits are good sources of the carotenes, including beta-carotene.
With the flu, you may feel very weak and fatigued for up to two or three weeks. You'll have muscle aches and periods of chills and sweats as fever comes and goes. You may also have a stuffy or runny nose, headache, and sore throat.
Rebuild your body after the flu. The road back to health after flu can be a particularly long one. Here we explain what you should be doing to build up your immune system and fight off any lingering effects. Have a Turkish bath: The flu virus can linger in the body for five to six weeks after the symptoms have cleared. According to Professor Ron Eccles, a specialist in cold and flu research, the heat of a Turkish bath can steam out the virus, which thrives in a cold nose, from the body.