The Evolutionary Link: What Is the Relationship Between Vitamin D and Folate?
                                
                                
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                                    4 min read                                
                            
                                According to a long-standing theory, the “vitamin D–folate hypothesis,” ultraviolet radiation (UVR) has opposing effects on these two essential nutrients, synthesizing vitamin D while degrading folate. This dynamic interplay has led to the evolution of different skin tones as a balancing act to maintain optimal levels of both vitamin D and folate, depending on geographical latitude and sun exposure.