A small case series found topical hemp extract promoted hair regrowth
In a case series of patients with various types of hair loss, topical application of a hemp extract containing CBD, THCV, and CBDV was associated with visible hair regrowth over 6 months.
Quick Facts
What This Study Found
Patients applying a topical hemp extract to areas of hair loss showed measurable increases in hair count and thickness. The extract targeted the endocannabinoid system at hair follicle receptors.
Key Numbers
Multiple patients showed visible hair regrowth documented by photography and trichoscopy over approximately 6 months of daily topical application.
How They Did This
Case series with before-and-after photography and trichoscopic measurement. Patients applied topical hemp extract containing CBD, THCV, and CBDV daily to affected scalp areas for approximately 6 months.
Why This Research Matters
Hair loss treatments are limited in number and effectiveness. If cannabinoids can stimulate hair follicles through the endocannabinoid system, it could open a new therapeutic avenue, though controlled trials are needed.
The Bigger Picture
The endocannabinoid system is present in hair follicles, and cannabinoid receptors like CB1 and TRPV1 play roles in hair growth cycling. This is an early signal that needs proper clinical trial validation before drawing conclusions.
What This Study Doesn't Tell Us
Case series with no control group, no blinding, and small sample size. Cannot rule out placebo effect, natural hair cycling, or other concurrent treatments. No standardized dosing protocol described.
Questions This Raises
- ?Would a randomized controlled trial confirm these findings?
- ?Which specific cannabinoid in the blend (CBD, THCV, or CBDV) is most responsible for the effect, if real?
Trust & Context
- Key Stat:
- Topical hemp extract with CBD, THCV, and CBDV applied for ~6 months
- Evidence Grade:
- Uncontrolled case series. Interesting signal but no ability to attribute results to the intervention without a controlled trial.
- Study Age:
- Published 2022.
- Original Title:
- Hair Regrowth with Novel Hemp Extract: A Case Series.
- Published In:
- International journal of trichology, 15(1), 18-24 (2023)
- Authors:
- Smith, Gregory Luke
- Database ID:
- RTHC-04950
Evidence Hierarchy
Describes what happened to one person or a small group.
What do these levels mean? →Frequently Asked Questions
Can CBD regrow hair?
This case series suggests topical hemp extract containing CBD and other cannabinoids may promote hair regrowth, but there is no controlled trial evidence yet. The endocannabinoid system is active in hair follicles, providing biological plausibility, but much more research is needed before drawing conclusions.
How would cannabinoids affect hair growth?
Hair follicles contain cannabinoid receptors (CB1) and TRPV1 channels. These receptors influence the hair growth cycle. CBD acts as a CB1 antagonist and TRPV1 agonist, which could theoretically shift follicles toward the growth phase, but this mechanism is still being investigated.
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Cite This Study
https://rethinkthc.com/research/RTHC-04950APA
Smith, Gregory Luke. (2023). Hair Regrowth with Novel Hemp Extract: A Case Series.. International journal of trichology, 15(1), 18-24. https://doi.org/10.4103/ijt.ijt_34_22
MLA
Smith, Gregory Luke. "Hair Regrowth with Novel Hemp Extract: A Case Series.." International journal of trichology, 2023. https://doi.org/10.4103/ijt.ijt_34_22
RethinkTHC
RethinkTHC Research Database. "Hair Regrowth with Novel Hemp Extract: A Case Series." RTHC-04950. Retrieved from https://rethinkthc.com/research/smith-2023-hair-regrowth-with-novel
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.