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.
Symptoms of a cold can be felt about 1-4 days after catching a cold virus. They start with a burning feeling in the nose or throat, followed by sneezing, a runny nose, and a feeling of being tired and unwell.This is the period when you are most contagious -- you can pass the cold to others -- so it's best to stay home and rest.sually there is no fever; in fact, fever and more severe symptoms may indicate that you have the flu rather than a cold. Cold symptoms typically last for about 3 days. At that point the worst is over, but you may feel congested for a week or more.