What’s the best way to prepare for a BBL? Any specific vitamins or medications to take before hand?

You will need to ask the board certified plastic surgeon who will be performing your procedures. In my practice, no specific vitamins are recommended. If your lab work indicates that your hemoglobin levels are low, you may need to take iron. I recommend that my patients stop taking Vitamin E the week prior to surgery to prevent bleeding problems. Before and after surgery I recommend a diet high in protein to assist in healing.

Dear Sanii27,
every plastic surgeon has his own preoperative protocol which he recommends to his patients. I would suggest you to discuss this with your plastic surgeon.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

You should avoid aspirin for 7 days before and 7 days after surgery. No NSAIDS (Advil, Motrin, Aleve) for 5 days before or after surgery. Take Arnica and Bromelain for a few days before surgery and continue for 5-7 days after-these will reduce bruising and swelling.
Avoid: Ginger, gingko biloba, Echinacea, garlic, licorice, fish oil, St. John's Wort, Vit E, Omega-3: All which have been associated with bleeding
Best wishes,
Dr. T