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What Are Stem Cells and How Can They Make You Healthier?
You’ve probably heard of stem cells before. Most likely it’s been in the context of a debate over their use in research. But do you know just what they are and how they can improve your health? Time for a little stem cell 101.
Your Body’s Cells
Most cells in your body are specialized. For example, in the brain you have neurons, in the blood you have red blood cells, and other cells comprise your muscles and bones. All of these cells carry your unique DNA. The differentiating factor of the cells is that some of them have certain genes either turned on or off. The genes are encoded in the DNA. The genes are all the same. However, the gene expression differs. The genes expressed in a red blood cell are different to those expressed in a lung cell. The red blood cell will always stay a red blood cell. It is not able to change into a lung cell one day. But stem cells can. The cells within your body have to be replaced. Your taste buds, for instance, are replaced every ten days. Skin cells are replaced every two weeks, and your liver cells are turned over every 300-500 days. The cells that do the replacement are called adult stem cells.The Stem Cell Difference
Stem cells are unspecialized cells that give rise to specialized cells in a process called differentiation. When a stem cell divides, the new cells can either remain as stem cells or become other cells that have a specialized function. There are two main types of stem cells:- Adult stem cells
- Embryonic stem cells