I am very satisfied with this product and may only each friend. Since I suffer from a chronic gastritis type C and the GP not have much idea, I had to look after my well-being itself. Constantly I was tired and listless even though I regularly operating what me but also extremely difficult lot. This I then took proton inhibitors regularly my Vitamin B12 deficiency was inevitable. I have the first 2 weeks every day taken an then only 3 a week and now only 2 times a week and you have helped me. I feel really good, I feel great and my ongoing fatigue is no longer left. Conclusion: At the doctor can check vitamin B12 costs about 40 euros me is it worth my health.