Hi! As I've heard, B vitamins are not helpful for all types of stuttering, only for those linked to neurological conditions or developmental issues, so optimizing B-vitamin intake could really support overall brain health. But in any case you need some time to let your supplements work, especially if you have deficiencies in specific B vitamins. So I wish you a good luck in fighting your stuttering! You just need some patience and good-quality supplements, I may recommend you also [vitamin b complex](https://www.amazon.com/NUTRAHARMONY-Vitamin-Complex-11-Supplements/dp/B0BTT3JCTF) that I take myself, it has a well-balanced dosage of all B vitamins.