Causes of Weakness in Legs. Weakness in the legs can be caused by many conditions and diseases. Weakness means there is less strength in the muscles than there should be. Some people mistake fatigue as weakness, but technically in the medical world, they aren't the same. People with the flu or cancer, for example, may say they feel weak when they're referring to sluggishness.
1 (Outside of the body, Lactobacillus acidophilus is the probiotic that is found in some yogurts.). 2  Foods that contain probiotics include: some juices and soy drinks, fermented and unfermented milk, buttermilk, some soft cheeses, miso, tempeh, kefir, kim chi, sauerkraut, and many pickles.
Probiotics help move food through your gut. Researchers are still trying to figure out which are best for certain health problems. Some common conditions they treat are: 1  Irritable bowel syndrome. 2  Inflammatory bowel disease (IBD). 3  Infectious diarrhea (caused by viruses, bacteria, or parasites). 4  Antibiotic-related diarrhea.actobacillus. This may be the most common probiotic. Itâs the one youâll find in yogurt and other fermented foods. Different strains can help with diarrhea and may help with people who canât digest lactose, the sugar in milk. Bifidobacterium. You can also find it in some dairy products.