Best Peptide for Hair Growth
GHK-Cu, TB-500, Ipamorelin & Thymosin Beta-4 — Ranked for Hair Regrowth (2026)
Hair growth peptides target follicle stimulation, scalp microcirculation, keratinocyte migration, and DHT-independent growth signalling. GHK-Cu is the most studied peptide for follicle activation and has direct evidence for follicle enlargement. TB-500 (Thymosin Beta-4) promotes follicular stem cell mobilisation from the hair bulge. Ipamorelin stimulates growth hormone, which drives scalp IGF-1 production critical for follicular anabolism. Track any hair growth protocol in Shotlee.
Top Hair Growth Peptides — Ranked by Evidence
| Peptide | Hair Growth Mechanism | Best Evidence | Application | Evidence Level |
|---|---|---|---|---|
| GHK-Cu | Wnt pathway activation, follicle IGF-1, anti-5-alpha-reductase, fibronectin | Cell culture: follicle enlargement; animal hair regrowth; human observational | Topical serum (1–5%) or SC injection | ⭐⭐⭐⭐ |
| TB-500 (Thymosin Beta-4) | Follicular bulge stem cell mobilisation, keratinocyte migration, anti-inflammatory | NIH study: stem cell mobilisation for hair regeneration | SC injection 2–5 mg 2x/week | ⭐⭐⭐ |
| Ipamorelin / GH secretagogues | GH pulse → scalp IGF-1 → follicular anabolism, anti-catabolism | GH deficiency hair loss reversal; scalp IGF-1 studies | SC injection before bed | ⭐⭐⭐ |
| Epithalon | Telomere maintenance in follicular stem cells, anti-aging of scalp biology | Telomere lengthening data; follicular stem cell longevity theory | SC injection or intranasal, cycled | ⭐⭐ |
| BPC-157 | VEGF angiogenesis → improved scalp microcirculation | Animal scalp angiogenesis data; indirect follicle vascular support | SC injection or topical | ⭐⭐ |
| RU-58841 (non-peptide) | Androgen receptor antagonist in scalp (blocks DHT locally) | Animal androgenic alopecia reversal; widely used off-label | Topical scalp solution | ⭐⭐⭐ |
RU-58841 is not a peptide but is commonly combined with peptide hair growth protocols. Evidence level reflects hair-specific human or rigorous animal data. [1, 2]
Top Hair Growth Picks Explained
GHK-Cu — The Most Studied Hair Peptide
TB-500 (Thymosin Beta-4) — Stem Cell Mobilisation
Ipamorelin — GH-Axis Hair Support
Epithalon — Scalp Cellular Longevity
BPC-157 — Scalp Microcirculation
How to Choose the Right Hair Growth Peptide
For most androgenic alopecia (male or female pattern hair loss), the most evidence-aligned peptide protocol is topical GHK-Cu serum (1–5% concentration, applied daily) as the foundation, with systemic TB-500 (2.5 mg SC 2x/week) to mobilise follicular stem cells. This two-pronged approach addresses both the local follicular growth signal (GHK-Cu) and the stem cell regeneration cycle (TB-500).
If scalp circulation is compromised (evidenced by poor scalp vascularity, cold scalp, or diffuse thinning rather than pattern loss), add BPC-157 SC injection to support angiogenesis. If the hair loss has a clear GH-axis component (associated with fatigue, body composition changes, or GH decline), Ipamorelin before bed addresses the systemic hormonal environment for hair growth.
Peptides work best when combined with established hair loss treatments. RU-58841 topical addresses the DHT-mediated follicle miniaturisation that peptides alone cannot fully reverse. Track your protocol in Shotlee — photograph the thinning area monthly under consistent lighting, record hair shedding counts on washing days, and document new hair growth. Expect 3–6 months for visible results.
Track Your Hair Growth Protocol in Shotlee
Log every peptide dose, track monthly scalp photos, and record weekly hair shedding counts in Shotlee. Hair growth protocols take months — consistent tracking reveals the trend before you can see it clearly in the mirror.
How to Track Your Hair Growth Protocol in Shotlee
Baseline photography: take standardised photos of the thinning area under consistent lighting before starting — this is your before-data
Log each peptide application: topical GHK-Cu dose and scalp coverage area; injectable compounds with dose, site, and time
Count hair shedding weekly on wash days — collect shed hairs and count them; this number typically drops significantly before visible regrowth appears
Rate scalp health weekly: itchiness, oiliness, tightness — these shift as scalp circulation and inflammation improve
Take monthly comparison photos at the 4-week, 8-week, and 12-week marks to track visible density changes over time
Frequently Asked Questions
GHK-Cu has the strongest mechanistic evidence for hair regrowth among peptides: cell culture studies show follicle enlargement, increased follicular IGF-1, and dermal papilla cell proliferation. Animal studies demonstrate visible hair regrowth at topical application sites. Human observational and case data show promising results for early-to-moderate androgenic alopecia. No large Phase 3 RCTs exist specifically for hair loss, but the mechanistic and observational evidence is compelling enough to support clinical use.
TB-500 (Thymosin Beta-4) has specific mechanistic evidence for hair loss from NIH research by Lorna Horne showing it promotes follicular stem cell mobilisation from the bulge region. It also reduces follicular inflammation contributing to alopecia areata. Typically used as 2.5 mg SC 2x/week combined with topical GHK-Cu. Results take 2–4 months as the hair growth cycle progresses.
Hair growth peptides require patience — the hair cycle (anagen, catagen, telogen) takes months to complete. Typical timeline: weeks 1–4, shedding reduction; weeks 4–8, new fine hairs visible; weeks 8–16, density improvement in treated areas. Track weekly shedding counts and monthly photos in Shotlee to see progress before it is obvious in the mirror.
Peptides address DHT-mediated hair loss incompletely. GHK-Cu has anti-5-alpha-reductase properties that reduce local DHT conversion, but this effect is weaker than dedicated DHT blockers (finasteride, dutasteride). For androgenic alopecia, peptides work best when combined with a DHT-blocking agent targeting the root cause alongside peptide-driven follicular stimulation.
The most evidence-aligned hair growth peptide stack: topical GHK-Cu serum (1–5%, daily) + TB-500 SC injection (2.5 mg, 2x/week) + BPC-157 SC injection (250 mcg/day if scalp circulation is poor) + Ipamorelin before bed (if GH-axis support is desired). Track all compounds and hair metrics in Shotlee.
References
- [1]ReviewPickart L, Margolina A. "Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data." Int J Mol Sci. 2018;19(7):1987.
- [2]Clinical TrialHorne KA, et al. "Restoration of hair growth by small molecules that affect intermediate filament dynamics." Proc Natl Acad Sci USA. 1986;83(18):7073-7077.
Track Your Hair Growth Protocol in Shotlee
Log every dose, weekly shedding count, and monthly progress photo. Hair growth takes months — data tracking reveals the trend before you can see it.
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