I am told that applying Vitamin-E before donating blood prevents permanent scar formation. But won't it's effect be nullified when the Phlebotomist applies the disinfectant before drawing my blood? Is there any time prescription that it should be applied this many minutes before donating blood so that it may be fully effective?
Also, I hear that regular hair oils (such as almond hair oil) also have Vitamin E. Can they be used to prevent scar formation??