Ashwagandha
Adaptogenic herb with withanolides inducing apoptosis, inhibiting NF-κB; reduces chemo fatigue in one human study.
Forms: Root extract standardized to 5% withanolides · Whole root powder/capsules · Withaferin A-enriched extract (research use)
Simple Summary
Ashwagandha is an adaptogenic herb that may help reduce fatigue from chemotherapy and has shown promise in lab studies for killing cancer cells and curbing inflammation. One study in breast cancer patients found it improved quality of life during treatment.
Evidence at a glance
Robust preclinical anticancer mechanisms; limited human data focused on supportive care (fatigue reduction) in breast cancer.
How it may work
Ashwagandha (Withania somnifera) and its key compound withaferin A induce apoptosis in cancer cells via ROS generation, mitochondrial disruption, and p53 activation. It inhibits NF-κB signaling, reducing inflammation and angiogenesis. Preclinical data show cytotoxicity against breast, lung, colon, and other cancers, with immunomodulatory effects enhancing T-cell activity. In humans, it may alleviate chemotherapy-induced fatigue.
Targets & pathways
Curated mechanistic targets reported for this agent — how it may act on cells, not proof of a clinical effect.
- Apoptosis (cancer cells)↑ROS-mediated; p53-dependent
- NF-κB↓Reduces proinflammatory cytokines (IL-6, TNF-α)
- Angiogenesis↓VEGF inhibition (preclinical)
- T-cell activity↑Immunomodulation
- Chemotherapy fatigue↓Human trial evidence
- Tumor growth↓In vitro/in vivo models (breast, lung, colon)
Often studied / combined with
Combinations reported in the literature, not a protocol or a recommendation.
- Chemotherapy: Reduces fatigue and improves QoL in human study; potential radiosensitization preclinical.
- Curcumin: Complementary anti-inflammatory and NF-κB inhibition.
Overlapping mechanisms
- Anti-inflammatory ↓, Apoptosis ↑: Monitor for additive liver effects with other herbals.
Safety & interactions
Severity and how well-established each signal is are shown separately. Verify everything with your oncologist or pharmacist — absence here does not mean safe.
- sedatives (benzodiazepines, barbiturates)MonitorModerateTheoreticalAdditive CNS depression; increased drowsiness.
- chemotherapy (general)MonitorTheoreticalSupportive for fatigue; no known antagonism, but coordinate with oncologist.
- thyroid medicationsDose AdjustMildTheoreticalMay enhance thyroid function; monitor levels.
- immunosuppressantsAvoidModerateTheoreticalImmunostimulatory effects may counteract.
Timing
- With-meal: Reduces GI upset.
- PM: Adaptogenic effects may aid sleep.
References
- PMID 23142798 — Chemo fatigue trial in breast cancer
- PMID 33359918 — Withaferin A mechanisms
- PMID 37063285 — Anti-cancer review
- PMID 32173425 — Apoptosis induction
- PMID 37259311 — Immunomodulation
- PMID 34946778 — NF-κB inhibition
- PMID 39272948 — Angiogenesis effects
- MSKCC 2025 — Safety overview
Research
No published studies for Ashwagandha yet
New studies appear here once they’ve been reviewed. Browse all studies.
Dose: as studied, not a recommendation
Ranges seen in adjunct / practice use: 2–6 g (oral) 2 g TID of root extract; with meals to improve tolerance, Based on breast cancer fatigue trial (PMID 23142798); adjust for standardized withanolide content (typically 2.5-5%)..
Trials studying Ashwagandha
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