Is D-alpha tocopheryl synthetic? A Guide to Natural Vitamin E
                                
                                
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                                    3 min read                                
                            
                                Vitamin E is not a single compound but a family of eight different fat-soluble compounds, with alpha-tocopherol being the most biologically active form in humans. The key to understanding your vitamin E supplement lies in a single letter prefix: the 'd' vs. 'dl' that distinguishes between natural and synthetic origins.