According to multiple articles vegan diet may have serious detrimental impact on mental abilities - what’s your view?

Quotes and sources:

“veganism has been associated with adverse health outcomes, namely, nervous, skeletal, and immune system impairments, hematological disorders, as well as mental health problems”

https://pmc.ncbi.nlm.nih.gov/articles/PMC10027313/

“Without question, veganism can cause B12 and iron deficiencies, and without question they affect your intelligence”

https://www.bbc.co.uk/future/article/20200127-how-a-vegan-diet-could-affect-your-intelligence