[ekelsen]

The parent said nothing about purity of vitamins. That this is the first sentence of your response only seems to confirm his fears about marketing hype. I'm disappointed to see a legitimate PhD used for pseudo scientific snake oil sales.

It's also totally unclear what harm is caused by "fillers" such that their presence is a concern. Or what research backs up the improvement of personalizing vitamin dosages over taking a multi-vitamin - would love to see that study.

The first google search about the condition related to folate methylation took me to some pseudo-scientific naturopathic website that amongst other claims, made this one "it turns out that many of us (estimated at 45%) have at least one [mutation in this gene]". That this source / website is the first thing I find when searching for what you mention does not look good. Let's further break down this claim: it's unclear that having a mutation means that there is any actual loss in function. The statement implies it. But I can't find any evidence, anywhere, that this is true. I also can't find any evidence on the NIH website (https://ghr.nlm.nih.gov/gene/MTHFR#conditions) about the condition you mention or what it's prevalence might actually be - everything listed there is a pretty serious disease and you would know it if you had one of those conditions.

I'm honestly somewhat disgusted that YC chose to accept such a morally and scientifically terrible product to peddle. Even if selling bogus supplements to uninformed consumers is a good business.