 [ Symptoms ] i blowjob her and insert my toung in any chance she get infected from bacteria of mouthbreath  we both are healthy and without any std should i only lick on her lipsover vagina and clitoris rather inserting tounge to avoid spreading any kind of infection to her  also is there any harm if swallow the juice from her or if she swallow from me [ Disease ] when the amounts of niacin taken exceed 3 grams 3000 mg one of the potential side effects is high blood sugar do not take such high levels without a doctor is supervision for more on uses dosage and side effects see this webmd page good luck