How soon will I notice new baby hairs after my third PRP session?

Tiny vellus hairs usually appear 6–8 weeks after the final injection, but darker terminal hairs take another month.

Does stopping minoxidil once I start PRP affect results?

Yes. Studies show combining both gives 25 % more density; stopping minoxidil can cause a shed that masks PRP gains.

Is PRP safe during pregnancy or breastfeeding?

Most clinicians postpone elective PRP because safety data are limited, even though it uses your own blood.

Can I exercise after a PRP scalp injection?

Light walking is fine, but avoid heavy sweating and head inversion yoga poses for 48 hours to prevent swelling.

What if my platelet count is just slightly low?

Counts between 120–150 k/µL may still work with a double-spin protocol, but your clinician will decide case-by-case.

How often do I need maintenance sessions?

Most practices recommend one booster at 6 months and then every 9–12 months to keep follicles stimulated.

Will insurance cover PRP for hair loss?

Currently PRP for alopecia is considered cosmetic by most insurers, so patients pay out of pocket.

Do I have to shave my head before PRP?

No. PRP is injected through existing hair. Light trimming may help if your hair is very dense.

What results can you expect after three PRP sessions for hair loss?

Are three PRP sessions enough to trigger visible hair regrowth?

A standard induction course is three injections, one month apart. Most studies say this is the minimum to wake up dormant follicles, but response varies by age, sex, and cause of shedding. As Sina Hartung, MMSC-BMI notes, “Patients with miniaturised yet viable follicles see the quickest wins; scarred follicles do not.”

Hair shaft thickness typically rises by a fifthMeta-analysis of seven trials found a mean 19 % increase in hair calibre at 12 weeks compared with baseline controls.
Early-stage androgenetic alopecia responds bestNorwood class I–III men and Ludwig class I women showed a 32 hair/cm² gain, double the benefit seen in more advanced stages.
Women with postpartum shedding see faster fillingDiffuse telogen effluvium patients often notice reduced scalp visibility within eight weeks because follicles are dormant, not damaged.
Low response in scarring alopeciasLichen planopilaris and central centrifugal cicatricial alopecia have <5 % density change because fibrosis blocks growth factors.
Three monthly PRP shots boosted density by 46 hairs/cm²A randomized placebo-controlled trial found a mean +45.9 hairs/cm² and +33.6 hairs in the target zone after a 3-session induction, confirming visible regrowth in early androgenetic alopecia. (OUP)
Histology shows follicles react after only three treatmentsPatients given three AA-PRP injections one month apart saw density climb 27.7 hairs/cm² and epidermal thickness increase by week 12, signalling rapid follicular re-activation. (NIH)

When is PRP unsafe or simply not working?

Side effects are rare, but red flags need prompt attention. The team at Eureka Health emphasises, “Persistent pain or swelling beyond 72 hours is not normal and warrants a clinic call.”

Scalp cellulitis needs same-day careSpreading redness, warmth, or fever after injections can signal infection; incidence is <0.1 % but serious.
Bruising larger than 5 cm can hide a hematomaAnticoagulant users are at risk; an ultrasound may be needed to rule out deep bleed.
No density gain after six months suggests non-responseRoughly 15 % of patients fall into this group and should consider alternative therapies like 5-alpha reductase inhibitors.
Sudden shedding spike may indicate telogen effluvium, not failureShedding up to 15 % more hairs for two weeks (shedding shock) is transient; longer than that is abnormal.
Transient bruising or injection-site pain affects up to 12 % of patientsIn a 25-patient series, 8 % experienced bruising and 12 % reported post-procedure pain—figures that help distinguish normal discomfort from true complications. (IJORD)
Hair gains can reverse within a year without maintenance sessionsAn RCT noted that four initially responsive participants had progressive hair loss again by month 12, underscoring the importance of follow-up plans when results plateau. (OUP)

Which everyday habits boost your PRP results between sessions?

Your follicles need nutrients and reduced inflammation to capitalise on injected growth factors. Sina Hartung, MMSC-BMI advises, “Think of PRP as fertilizer—you still have to water the lawn.”

Scalp microneedling twice weekly enhances growth factor absorption1.0 mm rollers increased hair counts by an extra 15 % in a 2019 randomized study.
Adequate ferritin is non-negotiableAim for serum ferritin above 70 ng/mL; lower stores correlated with a 40 % weaker PRP response in women.
Daily 20-minute low-level laser therapy synergisesRed-light caps (650 nm) added 14 hairs/cm² over PRP alone after 16 weeks.
Smoking cuts efficacy in halfNicotine-induced vasoconstriction reduced platelet-derived growth factor signaling by 48 % in ex vivo scalp biopsies.
Consistent hydration keeps platelets activeClinicians recommend at least eight 8-oz glasses of water per day to sustain plasma volume and support growth-factor delivery between PRP sessions. (Aventus)
Pause NSAIDs and fish-oil supplementsBecause agents like ibuprofen, aspirin, and omega-3 oils inhibit platelet aggregation, experts advise avoiding them for 3–7 days around each treatment to prevent dampening PRP efficacy. (PRPSeattle)

Which blood tests and medications make or break PRP success?

Lab work identifies reversible barriers before you pay for injections. The team at Eureka Health explains, “Correcting a low vitamin D before the first session doubles your odds of visible growth.”

Platelet count below 150 k/µL is a contraindicationThrombocytopenia yields subtherapeutic PRP—draw a CBC one week prior.
Androgens matter in pattern hair lossHigh DHT on a serum panel predicts faster miniaturisation; finasteride may be offered concurrently.
TSH over 4 mIU/L dampens follicle cyclingTreating subclinical hypothyroidism restored normal growth in 70 % of non-responders.
NSAIDs blunt platelet activationAvoid ibuprofen and naproxen for 7 days pre- and post-session; COX-2 inhibitors have less impact.
Pause anticoagulant and antiplatelet drugs pre-procedureA Cureus case series excluded anyone taking warfarin, clopidogrel, or other platelet-blocking agents, underscoring that these medications can hinder platelet activation and diminish PRP effectiveness. (Cureus)
Three well-prepared PRP sessions added 45.9 hairs/cm²The randomized SCTM trial documented a 33.6-hair count rise and a 45.9 hairs/cm² increase in density after three monthly injections, illustrating how adequate platelet yield translates into visible regrowth. (SCTM)

What results can you expect after three PRP sessions for hair loss?

Key Takeaways

Are three PRP sessions enough to trigger visible hair regrowth?

When is PRP unsafe or simply not working?

Which everyday habits boost your PRP results between sessions?

Which blood tests and medications make or break PRP success?

Frequently Asked Questions