its really a very safe treatment because cells of blood are taken from the same patient body, so there is no chance of blood injecting issues.factors released from the activated platelets can theoretically stimulate cells in your hair follicles to grow, which is great for inactive or implanted hair follicles-Yes there are some important and basic precaution/preparation before PRP treatment-1.Hair + scalp precaution- use a quality shampoo and conditioner that helps to promote the health of your scalp and also your hairs.2.Diet and nutrition preparation- fruits, vegetables,1L of water per 30kg of body weight.3.Avoid-bread,pasta,rice,pastries,fried food,soft drink,alcohol,all smoking-related activities,fish oil etc.4.Look after yourself-have a good sleep and rest- 6 to 8 years in a day.have a good routine of diet