The art of tattooing has been around for centuries, if it wasn't safe then the trend would have died off years ago.
The pigments that are used (regardless of manufacturer) are sterilised and purified and approved for cosmetic use. In the US, the FDA overseas the regulation of the pigments used and in th EU, there is also a register that companies need to register their products with to ensure that they are safe for the use that was intended.
It is always advisable to avoid counterfeit products (obviously), as they do not undergo the same rigorous testing and often do not meet the necessary safety requirements.
It is the technicians responsibility to ensure proper sanitation to help prevent infection or cross contamination; all reputable technicians will have registered for a licence to practice from their local authority, who will have checked that they meet all of the requirements for their area.
Clients should advise technicians if they plan to undergo laser treatments, Botox, dermabrasion, peels etc as there may be issues with these treatments, but trained technicians will be able to outline all the hazards to you during the consultation procedure. Sometimes laser treatments turn pigment to a dark or black color. Collagen and pigments do not mix well either, so make sure clients ask a dermatologist or doctor to explain the possibility of reactions to Botox or collagen. The client may have to undergo those types of procedures before getting any permanent makeup done.
MRI's do not present a risk with Biotouch pigments