Dr. Clark Vitamin B1 Thiamine 500mg Supplement -Thiamine B1 Supplement for Healthy Nervous System & Energy Metabolism, Gluten-Free, Dairy Free - 100 Gelatin Capsules

Good product and value. Not too big.

Excellent vitamin supplement for a healthy body

Good product and on time

This is high quality thiamine. More expensive than others but worth it as I appreciate the lack of excipients and the use of gelatin caps - they go down and dissolve so much easier than veg caps. I wish these came in a smaller dose, however. I get plenty of effect from opening the capsule and taking 1/3 or 1/2 of this 500mg dose. Would rather take 100mg 3 times a day than a big hit of 500mg at once.

Had an upset stomach after taking this ..I had to make sure so I took it twice and the second time I had another upset stomach , not sure if this is third party tested but why is true Vitamin B1 harder to find ? The best brand was Dr Berg B1 until he combined it with other B vitamins

I’m not sure why it’s so hard to find B-1 in HCL form but I’m glad I found this, cause I think it’s the best. The capsules are a good size and easy to swallow. They always arrive on time and are great quality. Would highly recommend!

I used to love Dr. Clark's Vitamin B1 500 mg. I've been getting it on Autoship for over a year. My most recent bottle said it was 400 mg. This listing says it's 500 mg. This is the same place that I've been getting my Autoship from. Today I was going to put the rest of my prior bottle into the new bottle and I noticed that it was 400 mg too! Lately, I'd noticed that I wasn't falling asleep as quickly and now I know why! I can't believe they kept sending this to me without telling me that the formulation had changed from 500 mg to 400 mg. You need to change your listing here. I don't understand why they changed it.

Disappointed after taking this pill for months it had less to no affect, I was previously taking two B 250 mg pills, all I wanted was to take one tablet as I use a number of daily supplements. Found better elsewhere.