There is certainly a lack of intellectual humility.
I would consider this kind of "biohacking" to be the fallacy of complexity-seeking.
If one is looking to be healthy, the effort is much better spent on getting good sleep, healthy well balanced diet, regular exercise, maintain social relationships, manage stress. No one wants to hear this because simplicity is boring, and useless for social-status signaling.
Vitamins and all the other biohacking stuff is nonsense that gets in the way of that, with minimal benefit, and opening oneself to harms (in a rumsfeldian known known, known unknown, and unknown unknown sense).
