It's safe if done safely. How's that for an answer? If your nutrition is sound and you are exercising then it is safe, though a bit on the high side. If you are doing nothing beyond ordinary then I'd go in for a general check-up and let your doctor know. In fact, go ahead and do it just to be safe, chances are you are due. Be mindful that most general practice doctors aren't nutritionists but they are good at hearing what is going on and having an informed opinion.