What Percent of Your Blood is Salt? Understanding the Salinity of Blood
                                
                                
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                                    4 min read                                
                            
                                The human body is remarkably good at maintaining a stable internal environment, a process known as homeostasis. When it comes to blood, the salt concentration is maintained in a very narrow, tightly controlled range, with the plasma being approximately 0.9% salt by weight. This critical balance is essential for proper cellular function and overall health.