ive heard that going over 20-25g will increase likelihood of vomiting. but who knows how much you go over will increase likelihood of vomiting by how much. i think if u go over by a few grams its still okay. because remember the original recommended dose was 15g of SN, now its 20-25g. unless you do like 100g or something then its too much. i think 2 flat tablespoons will give you 24g to 30g which should be okay