I believe most people are not notability adversely affected by sugar and a small subset of the population, like myself, are acutely affected. The former does not invalidate the latter. Sarah Wilson of “I quit sugar” fame started off with a zero sugar crusade then later ameliorated her advice in an apparent effort to generalize her advice for a wider audience. I think advice should be tailored by conditioning on what category a person fits into. I would go further and suggest that a zero sugar diet should also have zero fruit. As a ADHD sugar addict I would generally substitute sugar with fruit and that prevented me from finding out that even my ostensibly healthy diet had too much sugar in it.