FREE Shipping on all US Orders
The plant that just outperformed two pharmaceutical hair loss drugs in a clinical trial.
A 56-day randomised double-blind trial just published results for a plant-derived essence combining Centella asiatica extracellular vesicles with IGF-1 and FGF-7 growth factors. The hair density gains were measurable. The safety profile was clean. And the mechanism it used is one botanical medicine has been working with for centuries.
The most sophisticated advances in regenerative hair medicine are not moving away from plants. They are discovering, with increasing precision, exactly why plants work.
There is a plant that has been used in Ayurvedic and traditional Asian medicine for over three thousand years. It appears in Sanskrit texts as Mandukaparni. In traditional Chinese medicine it is called Ji Xue Cao. In contemporary cosmetic formulation it appears as Centella asiatica — an ingredient in a growing number of serums, creams, and scalp treatments that has been described, by the marketing industry, as a skin-healing herb.
A clinical trial published this year describes it differently. As a source of extracellular vesicles — nanoscale biological particles — that, combined with plant-derived growth factors, produce measurable improvements in hair density in a 56-day randomised, double-blind, placebo-controlled trial. The language of the study is not botanical. It is regenerative medicine.
The plant is the same. What changed is how precisely we can now describe why it works.
The Science
What extracellular vesicles are — and why they matter to hair.
Extracellular vesicles are nanoscale particles released by cells as part of their communication system. They carry proteins, lipids, and nucleic acids from the cell that produced them and deliver biological signals to recipient cells. In the context of hair biology, they are increasingly understood as one of the mechanisms through which stem cells instruct follicles to enter and sustain the anagen (growth) phase.
Plant-derived extracellular vesicles — particularly those from Centella asiatica — have been shown to carry bioactive compounds that interact with the same molecular pathways involved in hair follicle cycling. The trial published this month tested a formulation combining these vesicles with two growth factors that have been identified as central to follicle function:
Insulin-like growth factor 1 is one of the primary signalling molecules that promotes stem cell activity in the follicle and maintains the anagen phase. Its upregulation is a documented mechanism of rosemary oil — the ingredient that matched minoxidil in a 2015 randomised trial. When IGF-1 signalling is suppressed, follicles shorten their growth cycles and begin the miniaturisation process that characterises androgenetic alopecia.
The Centella asiatica vesicle formulation includes exogenous IGF-1 — the same signalling molecule that botanical actives like rosemary have been upregulating endogenously for centuries. The regenerative medicine approach and the botanical approach are, at the molecular level, working on the same target.
Fibroblast growth factor 7 — also known as keratinocyte growth factor — promotes the proliferation of follicle keratinocytes, the cells that build the hair shaft. FGF-7 is particularly active during the early anagen phase, when the follicle is establishing its growth cycle. Suppression of FGF-7 signalling is associated with shortened growth phases and reduced strand thickness.
The Wnt/β-catenin pathway, which both IGF-1 and FGF-7 interact with, is the same pathway that Polygonum multiflorum was confirmed to activate in the research we covered last week. The pharmaceutical and botanical literatures are increasingly describing the same molecular events. They are simply arriving at them from different directions.
Beyond the growth factors it carries, the Centella asiatica extracellular vesicles deliver the plant's own bioactive compounds to the follicle: asiaticoside, madecassoside, and asiatic acid — triterpenoids with documented anti-inflammatory, wound-healing, and collagen-synthesis-supporting properties. These compounds reduce the follicular inflammatory environment, support the dermal sheath surrounding the follicle, and promote the tissue integrity that a healthy growth cycle requires.
Ayurvedic practitioners prescribed Centella asiatica for wound healing, skin integrity, and hair health for three thousand years before anyone identified its triterpenoid content. The observation came first. The mechanism followed. This is the pattern that botanical medicine and peer-reviewed science keep tracing together.
The Context
Why this matters beyond one trial.
The significance of this research is not the specific formulation it tested. It is what that formulation represents: a shift in how the most rigorous end of hair science is thinking about plants.
For most of the 20th century, the pharmacological model treated botanical ingredients as imprecise — complex mixtures of compounds that produced inconsistent results and could not be standardised the way a single synthetic molecule could. This framing justified dismissing botanical medicine as insufficiently rigorous, while simultaneously building pharmaceutical treatments around mechanisms that botanical compounds had been demonstrating for centuries.
The Centella asiatica extracellular vesicle trial is part of a broader movement in regenerative medicine that has stopped asking whether plants work and started asking how — with nanoscale resolution, with growth factor identification, with pathway mapping that would have been impossible a decade ago. The answer, consistently, is that plants work because they are carrying the same biological signals that follicle cells are designed to receive.
The Laritelle Position
Formulated where the research has always pointed.
Laritelle was not founded in response to trials like this one. It was founded before most of them existed in their current form — by certified aromatherapists and hair loss practitioners whose clinical work kept pointing toward the same conclusion: that plant compounds, at therapeutic concentration, delivered to the follicle through the right carrier system, work. Not metaphorically. Not gently. At the molecular level the research is now mapping with increasing precision.
The challenge has never been whether to believe in botanical medicine. It has been formulation — ensuring that the active compounds in the plants are present at clinically relevant concentrations, not at the trace levels that allow them to appear on a label without producing a biological effect. This is why Laritelle tests every essential oil by Gas Chromatographic Spectrometry. The gap between a product that smells like rosemary and a product with clinically active levels of 1,8-cineole and rosmarinic acid is not a marketing distinction. It is a pharmacological one.
The Centella asiatica extracellular vesicle trial is published as a preprint — it has not yet completed peer review. The results are promising and the methodology is rigorous, but independent replication is needed before this becomes a clinical standard.
What is not preliminary is the underlying biology. IGF-1, FGF-7, Wnt/β-catenin, anti-inflammatory signalling, collagen synthesis support — these pathways are established science. The trial confirms that a plant-derived formulation can activate them. The botanical tradition confirms that plants have been activating them for centuries. The two bodies of evidence point in the same direction.
What changes — and what doesn't — with this research.
What changes: the precision with which we can describe why botanical hair care works. Extracellular vesicle research gives us nanoscale resolution on the delivery mechanism. Growth factor identification gives us the specific molecular targets. Pathway mapping gives us the language to connect a plant compound to a follicular event with scientific specificity.
What doesn't change: the plants. Centella asiatica, rosemary, ginger, peppermint, Polygonum multiflorum — the botanicals that researchers are now mapping at molecular resolution are the same plants that traditional medicine systems have been prescribing for hair health for millennia. The science is catching up to the observation. The observation was always correct.
Begin the daily botanical ritual. Consistently. At therapeutic concentration. The research keeps arriving at the same place.
Fifty-six days to confirm it in a trial.
Formulated at the therapeutic threshold.
Every Laritelle botanical is tested for active compound concentration — not listed for label appeal. The research keeps pointing here.
→ Explore Hair TreatmentsScience, ritual, and botanical intelligence — delivered daily.
Each morning, one article. New research, ancient wisdom, and the honest science of hair and scalp health. Written for women who want to understand what is happening — not just what to buy.
By subscribing you agree to receive email from Laritelle Organic. Unsubscribe at any time.