A non-psychoactive hemp seed extract slowed colorectal cancer cell growth by triggering metabolic stress | Research

The takeaway

A polar extract from industrial hemp seeds (lacking THC) reduced colorectal cancer cell growth by depleting ATP, activating a cellular energy sensor, and disrupting autophagy, and combining it with an autophagy inhibitor boosted the effect by 30%.

Cancer metabolism researchers, phytochemistry scientists, hemp/cannabis researchers

~40% ATP reduction and ~30% enhanced antiproliferative effect when combined with autophagy inhibitor

What the researchers found

The oil polar extract (OPE) from the Codimono hemp cultivar induced metabolic stress in HT-29 colorectal cancer cells, decreasing ATP by approximately 40%, activating AMPK (a cellular energy sensor), and disrupting autophagic flux. This caused G1 phase cell cycle arrest without triggering apoptosis. Adding chloroquine (an autophagy inhibitor) enhanced antiproliferative effects by approximately 30%.

Why it matters

This study identifies a non-psychoactive hemp-derived extract that works through metabolic stress rather than direct cell killing. The synergy with autophagy inhibitors suggests a combination strategy that could be explored in more advanced cancer models.

The numbers in context

ATP decreased by approximately 40%. AMPK was activated. G1 cell cycle arrest observed. No apoptosis triggered. Chloroquine combination enhanced antiproliferative effect by approximately 30%. Extract from Codimono cultivar (no THC).

How the study worked

In vitro study characterizing the phenolic composition of a polar extract from cold-pressed hemp seed oil (Codimono cultivar, lacking THC). Effects on HT-29 colorectal cancer cells were evaluated for ATP levels, AMPK activation, autophagy markers, cell cycle distribution, and apoptosis. Combination with chloroquine was tested.

What this study cannot tell us

In vitro only (cell lines, not tumors in animals or humans). Single cell line (HT-29). The specific bioactive compounds within the extract are not fully identified. No pharmacokinetic data on whether these compounds would reach tumors in a living organism.

How to read the evidence

Single cell line in vitro study provides mechanistic detail but is far from clinical applicability.

When this study was published

2026 publication

The bigger picture

The cancer research field increasingly focuses on metabolic vulnerabilities of tumor cells. This study connects hemp-derived compounds to metabolic stress pathways, offering a different angle from the more commonly studied THC and CBD effects on cancer.

Questions still open

Which specific compounds in the hemp seed extract are responsible for the effects? Would these findings translate to animal models? Could the autophagy inhibitor combination be tested in clinical settings?

Common questions

Does this mean hemp seeds fight cancer?

This is a very early lab study on isolated extracts applied directly to cancer cells in a dish. It is far too preliminary to make any claims about hemp seeds and cancer in people.

Is this related to CBD?

The extract contains phenolic compounds from hemp seeds, not CBD specifically. The Codimono cultivar used lacks THC, and the study focused on the polar (water-soluble) fraction of the seed oil.

Read the original research

Hemp seed extract exerts cytostatic effects through metabolic stress and autophagy modulation in malignant cells.

Scientific reports, 16(1), 6829

View on PubMed ↗Publisher’s paper ↗

Citation

Moccia, Stefania; Russo, Maria; Cervellera, Carmen; Crescente, Giuseppina; Spagnuolo, Carmela; Russo, Gian Luigi. (2026). Hemp seed extract exerts cytostatic effects through metabolic stress and autophagy modulation in malignant cells.. Scientific reports, 16(1), 6829. https://doi.org/10.1038/s41598-026-37119-4