The risks of SMP micropigmentation Ink on the body and its side effects on FUE transplanted hairs?

SMP, or scalp micropigmentation, is a painless procedure that uses highly specialized equipment and unique techniques to carefully and expertly inject all-natural, color-tailored pigments into the scalp creating a completely natural look of the patient’s hairline. A typical procedure involves an initial consultation and two pigmentation sessions to achieve the desired results. You can wash your head the fourth day after the treatment and, during that time, avoid any strenuous activity that will prompt undesired sweating. Once the procedure is complete, the results of a Scalp Micropigmentation treatment can last up to five years.
At the Foundation for Hair Restoration in NYC, I work with the world-renowned hair expert Dr.Jeffrey Epstein and his team to create beautiful, natural results for any hair type.
The depth of SMP needles is more superficial than the hair bulb and so no danger exists to natural or transplanted hairs. 
Consult with an experienced hair restoration surgeon for a complete range of options that are appropriate for your situation.

patient001,Thanks for the question. If you were to have the  smp first, I would recommend waiting until after 6 weeks because we normally do a one month post-smp procedure follow up with a touch up if needed. We used 100% organic ink, no harmful chemicals or metals. This avoids the changing to unusual colors or pose the risk that chemicals have on your health.Since the ink is organic, the body will eventually metabolize it so will fade in 1-3 yrs. 

Each doctor is different and have different requirements.  You can have SMP after your FUE area has healed.  This can be several weeks to months.  SMP will not damage hair follicles.The risk of SMP is same as the risk of any tattoo.  Any foreign substance deposited into your body can be a potential cause for infection or even cancer.  When the ink fades, your body's immune system is taking it away and and expelling it. 

Hello.It may be a better option to have your hair transplant first so that can see what your density will be prior to having the shading from the micropigmentation on teh scalp.  Just a thought. The ink is placed very superficial and over time your immune cells, specifically pac-man like cells called macrophages, will eat the pigment and break it down.  If you have older tattoos that are starting to fade out and become blurry, that gives an indication how your body will respond to the pigment.  The follicles of the hairs are anchored deep so the pigment won't affect the hairs' growth rate or thickness in the area.  There is no harm with this process unless there are chemicals or metals that you are allergic to.  Some people are allergic to a chemical that makes red ink.  Red may be a component of brown ink.  These are things to talk to your SMP specialist about.  I am a dermatologist and specialize in hair loss conditions-diagnosing and managing all hair conditions-whether they are reversible or not.Hope this helps.  Nikki D. Hill, MD

These are very interesting questions.  A pubmed NIH search doesnt show anthing that would directly answer this but in general scalp trauma should be avoided after an fue procedure for at least a month, or until the hairs start to grow.