If you are weighing Rejuran, the number of visits matters as much as the price of one. Here is what a source says about a typical course.
The usual number of visits
northbiomedical.com says Rejuran is administered as a series of microinjections across the face, typically three or more sessions, by a trained provider. It adds that the treatment comes with the usual transient bruising and swelling, real cost, and results that fade as the stimulated tissue turns over.
Free reading on the treatment
Reading is the cheap step. Dermatology Times has a piece titled polynucleotide therapy shows promise in scar and burn management. One paper offers a real-life assessment of injectable polynucleotides high purification technology for skin rejuvenation.
Plan for a series, not a single visit
Because the source describes a series, ask about the full course before you start and not just the first visit. The injections themselves are not a do-it-yourself matter and belong with a trained provider.
Ask a clinician about the whole course
Put the question plainly to a licensed clinician: how many sessions would apply to you, and what would the whole course cost? A clear answer beats a guess.