CBD and Its Metabolites Reduce Human Neural Stem Cell Viability at Clinically Relevant Concentrations
CBD and its two major metabolites (7-OH-CBD and 7-COOH-CBD) dose-dependently reduced human neural stem cell viability, with longer exposures at blood-level concentrations causing cell death and altered differentiation, raising concerns about fetal brain development.
Quick Facts
What This Study Found
CBD, 7-OH-CBD, and 7-COOH-CBD all dose-dependently reduced NSC viability. CBD and 7-OH-CBD reduced cells at G1 phase. At clinically relevant blood concentrations, longer exposures caused more obvious cell death. After differentiation, CBD reduced GFAP and CB2 receptor expression. THC also reduced GFAP but not CB2. CB1 and beta-tubulin III expression were unaffected.
Key Numbers
Three compounds tested (CBD, 7-OH-CBD, 7-COOH-CBD). All dose-dependently reduced viability. Longer exposures at blood-level concentrations caused more cell death. GFAP and CB2 expression reduced after CBD-treated differentiation.
How They Did This
Human neural stem cells treated with CBD, 7-OH-CBD, 7-COOH-CBD, and THC at various concentrations and durations. Cell viability, proliferation, cell cycle, and differentiation markers (GFAP, CB1, CB2, beta-tubulin III) assessed.
Why This Research Matters
CBD is increasingly used by pregnant women who perceive it as safe. This study shows that CBD and its metabolites, at concentrations actually found in human blood, affect neural stem cells in ways relevant to fetal brain development.
The Bigger Picture
This is one of the first studies to examine CBD metabolites (not just CBD itself) on human neural cells. Since metabolites persist longer than the parent compound, their effects may be more clinically relevant than CBD alone.
What This Study Doesn't Tell Us
In vitro study with isolated stem cells, not intact brain tissue. Cannot replicate the complex fetal environment. Single cell line. Concentrations and durations are approximations of in vivo exposure.
Questions This Raises
- ?Do these in vitro effects translate to neurodevelopmental consequences in vivo?
- ?Should CBD products carry warnings about pregnancy use?
Trust & Context
- Key Stat:
- CBD metabolites caused cell death at concentrations found in human blood
- Evidence Grade:
- Human neural stem cell model with clinically relevant concentrations, but in vitro limitations prevent direct clinical conclusions.
- Study Age:
- 2025 study using human neural stem cells to model fetal CBD exposure effects.
- Original Title:
- The effects of cannabidiol and its main metabolites on human neural stem cells.
- Published In:
- Experimental biology and medicine (Maywood, N.J.), 250, 10608 (2025)
- Authors:
- Latham, Leah E, Gu, Qiang, Liu, Shuliang, Wang, Cheng, Liu, Fang
- Database ID:
- RTHC-06900
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
Is CBD safe during pregnancy?
This study shows CBD and its metabolites reduce human neural stem cell viability at concentrations found in blood, suggesting potential risks to fetal brain development that warrant caution.
Are CBD metabolites harmful?
Both major CBD metabolites (7-OH-CBD and 7-COOH-CBD) reduced neural stem cell viability, and since metabolites persist longer than CBD itself, they may pose greater exposure risk.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-06900APA
Latham, Leah E; Gu, Qiang; Liu, Shuliang; Wang, Cheng; Liu, Fang. (2025). The effects of cannabidiol and its main metabolites on human neural stem cells.. Experimental biology and medicine (Maywood, N.J.), 250, 10608. https://doi.org/10.3389/ebm.2025.10608
MLA
Latham, Leah E, et al. "The effects of cannabidiol and its main metabolites on human neural stem cells.." Experimental biology and medicine (Maywood, 2025. https://doi.org/10.3389/ebm.2025.10608
RethinkTHC
RethinkTHC Research Database. "The effects of cannabidiol and its main metabolites on human..." RTHC-06900. Retrieved from https://rethinkthc.com/research/latham-2025-the-effects-of-cannabidiol
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.