Deciding PRP or PRF starts in the wrong place almost every time. The clinician has a kit, a supplier, a protocol they were taught, or a marketing claim they half-believe, and the product arrives at the consultation before the indication does. Then the indication is bent to fit.
The principle Tatiana Sarmiento teaches in Empire Medical Training's curriculum inverts that, and it is the spine of everything below: the product should follow the indication, not the other way around.
This piece is prescriptive. It assumes you already understand what the two materials are and why they behave differently; if you do not, that is a separate document. Here we start from the clinical job and work backwards to the material.
The three questions that decide it
Every PRP-or-PRF decision reduces to three questions asked in this order. Answer them in order and the product usually selects itself.
1. What release curve does this tissue need? Do you need a large signal delivered quickly across a broad field, or a smaller signal sustained in one place over days? PRP front-loads: it releases significantly more growth factor in the first hour. PRF plateaus: it releases less initially but continues measurably for days, and releases more in total across a ten-day window (Kobayashi et al., Clinical Oral Investigations, 2016).
2. What delivery constraint does this anatomy impose? Does the material need to spread across a wide surface, or be deposited precisely into a discrete pocket? Does it need to stay liquid long enough for a device pass, or can it gel in place? PRP is liquid, spreadable and forgiving. PRF is viscous, time-limited and tends to stay where you put it.
3. What can your room actually deliver? PRF commits the room, the centrifuge and two staff for one uninterrupted block, and the preparation belongs to one patient. If your schedule cannot hold that, the decision has already been made for you — and choosing PRF anyway is how preparations get discarded.
Notice what is not on this list: which product is "stronger," which is newer, and which the kit rep is promoting. None of those are clinical questions.
These figures reflect Tatiana Sarmiento's clinical practice as taught in Empire Medical Training's hands-on curriculum. Technique is learned under supervision; this article is educational and is not a substitute for training.
Job 1: Broad skin-quality signal across a whole field
The clinical job: you want texture, tone and luminosity change across an entire cosmetic unit or an entire face. The patient's complaint is dullness, roughness, enlarged-appearing pores or a generally tired-looking complexion. There is no single defect to target.
The material: PRP.
Why: this job needs coverage, not concentration. You are distributing a signal across a large surface area, and a liquid does that; a material that gels within minutes does not. The release curve matters less here than the distribution, because the tissue response you are after is diffuse collagen and matrix remodelling rather than localised repair.
Tatiana Sarmiento teaches PRP as the choice when you want broad stimulation, when you want versatility across skin and body, and when the patient's goal is a glow rather than a correction. In her framing it is also the product that lets you treat two different areas in one visit, precisely because the handling window is forgiving enough to allow it.
The honest caveat: the evidence for PRP in general facial skin rejuvenation is mixed, and a clinician should know that before promising an outcome. A randomised trial in 18 women comparing PRP injections plus microneedling against saline injections plus microneedling found no macroscopic improvement in skin laxity, rhytides or roughness attributable to PRP over saline at 16 and 24 weeks (Pincelli et al., Plastic and Reconstructive Surgery Global Open, 2024). That is one small study with participants over 45 and relatively insensitive outcome measures, and other work is more favourable — but the signal here is not strong enough to support confident promises.
Job 2: Sustained regeneration in one discrete site
The clinical job: one localised area where you want repair signalling to continue for days rather than hours. The tissue is a defined pocket or defect, not a field, and the biological ask is healing and remodelling rather than surface quality.
The material: PRF.
Why: this is the job the fibrin matrix exists for. The scaffold physically holds platelets and leukocytes in the site instead of allowing them to disperse, and releases their cargo as it degrades. A 2025 systematic review across all fields of medicine found injectable PRF delivered higher platelet concentrations and more sustained long-term growth factor release than PRP, with 72% of included studies favouring i-PRF on outcome and 24% finding no difference (Farshidfar et al., Periodontology 2000, 2025).
This is also the job Tatiana Sarmiento names as her own reason for choosing PRF: she selects it specifically when she wants a longer release of growth factor into that tissue. Not because it contains more, but because it keeps giving.
The price: everything in the workflow. The clock starts at the venipuncture, the room is committed, and the preparation cannot be held. Choose PRF for this job knowingly, not by default.
Job 3: Topical partner for a device pass
The clinical job: you are running microneedling or an energy device and you want a biological adjunct applied to the treated surface.
The material: PRP, and only PRP.
Why: a topical adjunct has to remain liquid for the duration of a pass, wet a large field evenly, and provide glide under a moving handpiece. PRP does all three. PRF's defining behaviour — polymerising into a mesh within minutes — makes it unsuitable for exactly this job, because a gelling material on the skin surface stops spreading, stops gliding and cannot be re-distributed.
Tatiana Sarmiento teaches PRP as the microneedling partner for precisely these material reasons: it remains liquid, it spreads evenly, and it helps you glide during the pass. She also uses it topically after laser.
This material-selection question is substantial enough to deserve its own treatment, and the evidence for the combination is genuinely mixed. What is not mixed is the physics: whatever you conclude about efficacy, PRF is not a candidate for this job.
Job 4: Structural-looking soft tissue support in a small, defined area
The clinical job: a localised depression where the patient wants a visible contour change and you are working with an autologous option rather than a filler.
The material: PRF.
Why: viscosity and clot behaviour. A material that gels in place resists dispersion and stays where it was deposited in a way liquid plasma does not. Tatiana Sarmiento teaches that PRF is the more viscous of the two, that this viscosity is what allows it to be used for targeted support, and that the increased viscosity is also why a cannula rather than a needle becomes the sensible delivery instrument.
The caution that must travel with this job: the areas where clinicians most want this effect are frequently high-risk anatomy, and the periorbital region in particular is not a place to learn on. Product selection is only one input; anatomy, instrument and supervised training are the others, and none of them are substitutable.
The evidence caution: durability here is genuinely uncertain. A systematic review of 14 studies on PRP and PRF in periorbital rejuvenation found PRF associated with improvement in texture, wrinkles and crepiness but noted that improvements often diminished by six months, and concluded the current evidence does not establish either modality as superior (Sollitto et al., Journal of Cosmetic Dermatology, 2025).
And the hard line, which applies regardless of product: neither PRP nor PRF is a filler. Whatever a fibrin scaffold occupies in the first days is a resorbing autologous matrix. If the clinical job is genuinely replacing lost structural volume, the honest answer is a different category of product — and it is worth being clear with yourself about where facial volume is actually lost and about the real difference between biostimulators and fillers before you let a platelet concentrate take on that job.
Job 5: Pigmentation and vascular-appearing discolouration
The clinical job: the complaint is colour, not contour.
The material: PRP has the better evidence.
Why: the same systematic review that found PRF favourable for texture found PRP showed stronger evidence for treating hyperpigmentation, with outcomes sustained at six months where PRF's textural gains often were not (Sollitto et al., 2025). Tatiana Sarmiento's chairside teaching runs the same way: for under-eye darkness she reaches for PRP, reserving PRF for the hollowing.
That is a genuinely useful split, and it is the clearest case in this whole framework where the two products divide by what the patient is actually complaining about rather than by where the complaint is located. Two patients pointing at the same square centimetre of skin can need different materials.
The caveat: platelet concentrates are not a pigment treatment in the sense that a targeted laser or a topical agent is. Periorbital darkness is multifactorial — pigment, vascularity, shadow from hollowing and skin thinning all contribute in varying proportions, and the treatment that works is the one matched to the dominant contributor. Establish which one you are treating before choosing any material at all.
Job 6: Scalp
The clinical job: hair density in pattern hair loss.
The material: either, with a real trade to weigh.
Tatiana Sarmiento teaches that both PRP and PRF can be used on the scalp, with one protocol change: if you intend to inject PRF into the scalp, the injection has to be fast. That handling constraint is not trivial when the treatment field is the whole scalp rather than a single site, and it is the main practical argument for PRP in this indication.
The efficacy data have recently begun to point the other way, which makes this a genuine decision rather than a default. That deserves its own discussion rather than a paragraph here.
Job 7: Combination and sequencing within one plan
The clinical job: the patient needs more than one thing, and you are designing a course rather than a single treatment.
The principle: apply the framework per job, not per patient. There is no rule that one patient gets one platelet concentrate. A treatment plan can reasonably use PRP for a device-assisted field treatment and PRF for a discrete site, in different sittings.
The constraint is operational, not biological. The two require different tubes, different handling and different room workflows, and PRF commits the room in a way PRP does not. Interleaving them within a single visit is where plans fail. Separate them into different appointments and the plan holds.
Tatiana Sarmiento's framing of the whole exercise is worth quoting as a planning discipline: define the goal of the patient, then pick the behaviour. Not the product. The behaviour.
The framework in one table
| Clinical job | Material | The deciding property |
|---|---|---|
| Broad skin-quality signal, whole field | PRP | Liquid spreads; coverage beats concentration |
| Sustained regeneration, one discrete site | PRF | Fibrin scaffold holds cells and releases over days |
| Topical partner for a device pass | PRP only | Must stay liquid, spread and glide |
| Structural-looking support, small defined area | PRF | Viscosity and clot behaviour resist dispersion |
| Pigmentation and discolouration | PRP | Better evidence for hyperpigmentation |
| Scalp | Either | Efficacy favours PRF; handling favours PRP |
| Multi-part treatment plan | Both, separately | Apply per job; separate the appointments |
What this framework refuses to do
It will not tell you that one product is better. It will not tell you PRF is the upgrade. And it will not pretend the evidence is stronger than it is.
Three limits are worth carrying into every consultation. Protocols are not standardised, so two products both called PRP may not be the same material and published series may not describe what is in your tube. Facial durability is uncertain, with PRF's textural gains frequently diminishing by six months. And neither product replaces volume, repositions tissue or corrects laxity — those are the jobs of other categories entirely, and the point of a framework organised by job is that it makes the mismatch obvious before you have promised anything.
The discipline is simple and it is the whole of the method. Name the job. Name the release curve it needs. Name the delivery constraint. Then pick.
Empire Medical Training's Platelet Rich Plasma Training covers preparation and application of autologous platelet concentrates under supervision, and Medical Hair Loss, PDO Threads and PRP Hair Restoration covers the scalp indication. Where platelet concentrates sit alongside other regenerative agents is covered in our comparison of exosomes, PDRN and PRP; device-combination work is covered in Complete Cosmetic Laser Training.
Related guides in this cluster
Part of Regenerative Injectables: PRP and PRF.
Clinical GuideSingle Spin vs Double Spin PRP: What Actually Changes in the TubeSingle spin vs double spin PRP compared for clinicians — what the second spin concentrates, why volume compensates, and how processing
Clinical GuideLeukocyte-Rich vs Leukocyte-Poor PRP: Matching Cell Content to the IndicationLeukocyte-rich vs leukocyte-poor PRP explained for clinicians — the cytokine data, the PAW, DEPA and Dohan Ehrenfest frameworks, and wh
Clinical GuideDiagnose Before You Treat: The Hair Loss Workup That Must Precede PRPThe hair loss workup before PRP, step by step — onset history, pattern recognition, trichoscopy, category-level labs, and the diagnoses
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This article reflects the clinical opinions and experience of Tatiana Sarmiento, faculty, Empire Medical Training, an independent faculty member contributing to Empire Medical Training's curriculum. The views expressed are the author's own and do not necessarily represent those of Empire Medical Training.
It is professional education, not medical advice, and is no substitute for hands-on training or independent clinical judgment. Licensed clinicians remain responsible for their own patient selection, technique and outcomes, for verifying current product labelling, and for practising within their scope and applicable law. Empire Medical Training accepts no liability for reliance on this content.