Members Mark high potency Vitamin B12 provides a 5000 mcg dose that dissolves quickly under the tongue, and as a bonus also has a pleasant taste, all at a decent price. I’m always satisfied with Members Mark!

Great supplement, I have trouble absorbing vitamins and many B vitamin supplements make me nauseous. But because this one is sublingual it gets easily absorbed and for whatever reason, it doesn't make me the least bit nauseous, even on an empty stomach. AND...it comes out to $1.90 per month. You can't beat that!

Regular B12

I carefully read product information listed on the website on all of my vitamins to determine the country of origin. You have erroneously listed USA as the country of origin for components and assembly. The listing on the bottle is China. I DO NOT appreciate the "bait and switch".

The sweetener is maltodextrin, not Sucralose. The Sucralose shown on the label is negligible. As a chemist of 28 years, I have been part of two Sucralose studies, both sanctioned by the FDA. It is 100% safe. The hype placed all over the internet by the Aspartame lobby is wrong. There is more chlorine in your drinking water than there is in Sucralose. Get the facts, Aspartame is harmful.

Vitamin B12 (cyancobalamin, Cbl) has two active co-enzyme forms, methylcobalamin (MeCbl) and adenosylcobalamin (AdCbl). This product contains methylcobalamin. Both MeCbl and AdCbl are essential and have distinct metabolic fates and functions. MeCbl is primarily involved along with folate in hematopiesis and development of the brain during childhood, whereas deficiency of AdCbl disturbs the carbohydrate, fat and amino-acid metabolism, and hence interferes with the formation of myelin. It is important to treat vitamin B12 deficiency with a combination of MeCbl and AdCbl or hydroxocobalamin or Cbl. European Journal of Clinical Nutrition. 69 (1): 1–2

Many people like myself are allergic to the chemical sweetener Sucralose, not to mention all the people getting bad reactions from it, so why in the world did Sams choose to put this chemical in a vitamin of all things? Bad choice..product was returned.

Excellent product at a low price.

My doctor wanted me to take B12. My blood work is okay, so I guess it's doing its job.

Melts quickly & enjoy the taste.