I’ve been taking Vit B complex for over a year. For me it is a miracle. After thousands of dollars on clinical processes to address numbness tingling and pain over a 6 month period, I still had pain sensations especially at night. After researching many over the counter options and ingredients, I saw Thiamin, Vit B as an ongoing ingredient. So I get Nature Made B Complex with 2,000% Thiamin. I’ve been out of pain for over a year as a result. I understand every human body is different though, so wishing all good luck. P. S. My lab work is very healthy, I’m 74 yrs old. .