So far no problems...
I am taking this for anemia and will update after blood test in a month. For now, however, let me say... I have a very sensitive stomach and am not fond of weird flavors and have taken 10mg twice a day on an empty stomach (for 8 days now) and have had no negative effects (no stomach or intestinal discomfort or nausea from a nasty flavor - I love the taste)!  I do try to avoid contact with teeth as precaution against staining so take it in a &#34;shot&#34; manner. A dose contains over 5 grams of sugar, so factor that in if you are restricting sugar, but the B vitamin and iron content  far outweighs the disadvantage of the sugar (I normally eat no sugar). Good stuff!
Rating: 5 stars