There is also a lot of evidence that probiotics and probiotic foods can help with all sorts of digestive problems (5) This includes irritable bowel syndrome (IBS), ulcers caused by H. pylori infection, and various others (21, 22, 23, 24). For this reason, kefir may be useful if you have problems with digestion.
Bone marrow is the flexible tissue in the interior of bones. In humans, red blood cells are produced by cores of bone marrow in the heads of long bones in a process known as hematopoiesis. On average, bone marrow constitutes 4% of the total body mass of humans; in an adult weighing 65 kilograms (143 lb), bone marrow typically accounts for approximately 2.6 kilograms (5.7 lb).
Healthy adults are able to donate blood and the procedure is safe and relatively painless. During a regular donation, you will give around 470 ml of whole blood. This is about eight per cent of the average adultâs blood volume. The body replaces this volume within 24 to 48 hours, and replenishes red blood cells in 10 to 12 weeks.