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.
How long does fatigue last after flu - How long fatigue in flu last? Weeks. Sometimes the infection itself can last for up to 5 weeks. Fatigue, after the infection has resolved, can take up to 1-2 additional weeks to go away. Keep up on your vitamin D3 supplement/sunshine and probiotics since they help to recover faster.