Is niacinamide natural or synthetic?

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Tags

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2. #using
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5. #genetically
6. #nitrogen
7. #synthetic
8. #bacteria
9. #natural
10. #riboflavin
11. #vitamin
12. #foods
13. #niacinamide
14. #coming
15. #modified
16. #fermentation
17. #plant
18. #minimal
19. #nicotinamide
20. #effects
21. #acetic