Sustained Release Mega B-150Mg Balanced B-Complex, 60 Tablets - Dietary Supplement, Gluten-Free

These seem to have a long lasting sustained release. Good quality

Been using this for several years. Quality is consistently good.

Nature's Plus is the best that money can buy and works as intended.

Great value

Ok, no joke, these things are better than any other Vit B complex vit out there. I swear, i have tried others bc these are hard to find. I ran across these a long time ago in some vitamin shop in San Francisco and have never been able to find them any of the shops where i now live. Anyway, I am not sure if it is the dose or combo of the Bs with it but they give me real energy. I have tried 4 other brands and none of them do a thing for me. This is the only one that really works.