Can you have vitamin c, coffee, collagen powder or whey protein isolate powder 2 weeks prior to rhinoplasty?

Hello. Great question. Every surgeon has their own pre operative protocols. I will suggest contacting your surgeon's office for further details. 

Some nutritional supplements can caused increased bleeding if taken prior to surgery.  It is best to speak directly to your surgeon about this topic to see what they recommend.

Hello and thank you for your question. Generally speaking, some of these nutritional supplements, herbal and non-herbal medicines can potentially increase the bleeding risk. I would suggest that you discuss these with your plastic surgeon. Best,Pejman Aflaki, M.D.

Johns Hopkins-trained double board-certified plastic surgeon

Hi and thank you for your question.
All of the above mentioned supplements except for coffee should be absolutely fine. Some may even help speed your healing / recovery.  However, you must speak directly to your surgeon with regards to his or her preferences. Many surgeons prefer patients avoid coffee immediately before and after surgery.  
Hope this helps and good luck.
John Frederick