This product is not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider before using herbs, especially if you are pregnant, nursing, taking medications, or have a medical condition.
How does Sutherlandia frutescens work in the body?
Sutherlandia frutescens contains several bioactive compounds that contribute to its medicinal effects. L-canavanine demonstrates immune-modulating and potential anti-cancer properties in laboratory studies (Evidence Level C). Pinitol may help regulate blood sugar and support metabolic function. The herb also contains GABA, which contributes to calming effects, along with flavonoids and saponins that provide antioxidant support. These compounds collectively give Sutherlandia its adaptogenic properties, helping the body resist physical and emotional stress while maintaining homeostasis.
Does Sutherlandia interact with antiretroviral medications?
Yes, Sutherlandia frutescens may interact with antiretroviral medications and should not be taken alongside HIV/AIDS treatments without medical supervision (Evidence Level C). The herb affects immune function, which could potentially alter how antiretroviral drugs work. Patients on antiretroviral therapy must consult their healthcare provider before using Sutherlandia. Due to potential effects on blood sugar, individuals taking diabetes medications should also monitor glucose levels closely and seek professional guidance before combining with this herb.
What is the recommended dosage for Sutherlandia frutescens?
The standard adult dosage for Sutherlandia frutescens is 2-3 grams of dried leaf powder daily (Traditional use). This can be divided into two or three doses throughout the day. Sutherlandia is commonly available as capsules, tablets, or dried herb for tea. Start with a lower dose to assess tolerance, as some individuals experience initial digestive adjustment. Always follow product label instructions or consult a qualified herbalist, as potency can vary between preparations.
Is Sutherlandia safe to take during pregnancy?
No, Sutherlandia frutescens is not considered safe during pregnancy or while breastfeeding (Evidence Level D). Traditional knowledge and available evidence indicate this herb should be avoided by pregnant and nursing women. L-canavanine, one of the primary active compounds, may affect fetal development. Women who are pregnant, planning to become pregnant, or breastfeeding should not use Sutherlandia. Consult a healthcare provider for alternative immune-supporting herbs that are appropriate during pregnancy.
What are the side effects of Sutherlandia frutescens?
Sutherlandia frutescens is generally well-tolerated, but some users may experience mild side effects. The most commonly reported effects include mild diarrhea, particularly during the first few days of use as the digestive system adjusts. Some individuals also report dry mouth. These effects are typically temporary and resolve as the body adapts to the herb. If side effects persist or worsen, discontinue use and consult a healthcare professional for guidance.
What is Sutherlandia frutescens used for traditionally?
Sutherlandia frutescens, traditionally known as Cancer Bush, has been used in South African traditional medicine for centuries. Primary uses include treating wasting conditions, supporting immune function, and as an adaptogen to help the body cope with stress (Traditional use). Folk use has included cancer support, though clinical evidence remains limited (Evidence Level C). The herb is valued for improving appetite, energy levels, and overall wellbeing in those recovering from illness or experiencing chronic fatigue.
PubMed-compiled information sheet
This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.
Compiled from 30 PubMed articles · model: gemma4:31b
Summary
Sutherlandia frutescens (syn. Lessertia frutescens), known as 'cancer bush', is a South African medicinal plant used traditionally for cancer, diabetes, and immune support [PMID:40763763, PMID:18761068].
Background
Sutherlandia frutescens is a perennial shrub indigenous to the drier regions of southern Africa, including South Africa, Lesotho, southern Namibia, and southeastern Botswana [PMID:40763763, PMID:18761068, PMID:38103580].
Traditional uses
Traditional uses include treatment of internal cancers, diabetes, stomach complaints, indigestion, poor appetite, dysentery, colds, influenza, kidney conditions, fever, uterine troubles, liver conditions, backache, rheumatoid arthritis, urinary tract infections, stress, anxiety, dropsy, and heart failure [PMID:18761068, PMID:38139414]. It is also used as a bitter tonic ('blood purifier') and anti-stress medication ('musa-pelo') [PMID:18761068].
Active compounds
Phytochemicals include amino acids (such as L-canavanine, L-arginine, and GABA), triterpenoids, flavonoids (including 8-methoxyvestitol and mucronulatol), sugars, fatty acids, flavonoid glycosides, cycloartenol glycosides (sutherlandiosides A-D, sutherlandins), oleanane-type saponins, D-pinitol, tannins, phlobatannins, and cardiac glycosides [PMID:36616325, PMID:40733322, PMID:39519994, PMID:22654222, PMID:18808182, PMID:29544492].
Mechanism of action
The plant may act by repressing Hedgehog-signaling driven genes (Gli1 and Ptch1) in prostate cancer cells [PMID:26710108]. It suppresses the production of reactive oxygen species (ROS) and nitric oxide (NO) in microglia and neurons [PMID:27155670]. In vitro, it has been shown to induce apoptosis in cervical carcinoma cells [PMID:15763378] and prevent insulin resistance in human liver cells by regulating diabetes-related genes [PMID:23376105].
Clinical evidence
Evidence BHIV/AIDS (Safety/Efficacy)
In an adaptive double-blind RCT, S. frutescens did not change HIV viral load or CD4 T-lymphocyte count over 24 weeks [PMID:26186450].
Evidence BGeneral Health (Safety)
A randomized, double-blind, placebo-controlled pilot study in healthy adults evaluated the safety of 800 mg/day of leaf powder [PMID:17476314].
Evidence CCancer
While in vitro studies show antiproliferative and pro-apoptotic effects, a review suggests its potential as a cancer treatment remains highly questionable due to unrealistic dosages in studies [PMID:40763763, PMID:15763378].
Evidence DType 2 Diabetes
In Wistar rats, the extract normalized insulin levels and increased glucose uptake in muscle and adipose tissue [PMID:16939705].
Safety & adverse effects
In vitro, the plant can be cytotoxic and pro-apoptotic [PMID:37796713]. One study in HIV-seropositive adults noted that while it did not affect viral load, the mean and total burden of certain symptoms were analyzed [PMID:26186450].
Drug interactions
There is potential for drug-herb interactions via alterations in metabolism and transportation, specifically involving cytochrome P450 enzymes and P-glycoprotein [PMID:21756221]. It may interfere with the redox-dependent activation of isoniazid and other prodrugs used for tuberculosis [PMID:27155670].
Evidence summary
Evidence is primarily based on in vitro studies and animal models (Level D) and a few small-scale clinical trials (Level B). While promising in laboratory settings for anti-inflammatory and anti-diabetic effects, clinical efficacy for cancer and HIV is not well-supported by the provided data.
PubMed sources
1.PMID: 40763763 (2025) — The "Cancer Bush" Sutherlandia (syn. Lessertia) frutescens. An Example of Promotional Research, or Is There Scientific Merit? · Planta medica
2.PMID: 27155670 (2016) — Does Concurrent Use of Some Botanicals Interfere with Treatment of Tuberculosis? · Neuromolecular medicine
3.PMID: 36616325 (2023) — The Potential of Rhizobacteria to Mitigate Abiotic Stress in Lessertia frutescens. · Plants (Basel, Switzerland)
4.PMID: 40733322 (2025) — Phytochemistry, Ethnopharmacology, and Pharmacology of Lessertia frutescens (Cancer Bush): A Comprehensive Review. · Plants (Basel, Switzerland)
5.PMID: 37796713 (2023) — The Effect of Aqueous Lessertia frutescens Extract on TM3 Leydig Cells Exposed to TNF-α in vitro. · Frontiers in bioscience (Landmark edition)
Government sources
No direct government monograph is available for this herb. The content below is AI-generated and has not been verified against an authoritative government source. Use the search links to check official sources before relying on this information.
6.PMID: 39519994 (2024) — Isolation of Lessertiosides A and B and Other Metabolites from Lessertia frutescens and Their Neuroprotection Activity. · Plants (Basel, Switzerland)
7.PMID: 38103580 (2024) — Adventitious root culture of Lessertia frutescens for the production of triterpenoid saponins and polysaccharides. · Journal of biotechnology
8.PMID: 24480566 (2014) — Immunomodulating polysaccharides from Lessertia frutescens leaves: isolation, characterization and structure activity relationship. · Journal of ethnopharmacology
9.PMID: 26187042 (2015) — Sutherlandia frutescens may exacerbate HIV-associated neuroinflammation. · Journal of negative results in biomedicine
10.PMID: 33776463 (2021) — The Effect of Rooibos (Aspalathus linearis), Honeybush (Cyclopia intermedia) and Sutherlandia (Lessertia frutescens) on Testicular Insulin Signalling in Streptozotocin-Induced Diabetes in Wistar Rats. · Diabetes, metabolic syndrome and obesity : targets and therapy
11.PMID: 21756221 (2011) — Drug interactions in African herbal remedies. · Drug metabolism and drug interactions
12.PMID: 38139414 (2023) — Bioprospecting for Rhizobacteria with the Ability to Enhance Drought Tolerance in Lessertia frutescens. · International journal of molecular sciences
13.PMID: 26498493 (2015) — A review of commercially important African medicinal plants. · Journal of ethnopharmacology
14.PMID: 22654222 (2011) — Comparison of the selected secondary metabolite content present in the cancer-bush Lessertia (Sutherlandia) frutescens L. Extracts. · African journal of traditional, complementary, and alternative medicines : AJTCAM
15.PMID: 34471699 (2021) — The complete chloroplast genome of Lessertia frutescens (L.) Goldblatt & J. C. Manning (Leguminosae), an important medicinal plant species from Southern Africa. · Mitochondrial DNA. Part B, Resources
16.PMID: 15763378 (2005) — Sutherlandia frutescens extracts can induce apoptosis in cultured carcinoma cells. · Journal of ethnopharmacology
17.PMID: 23376105 (2013) — Sutherlandia frutescens prevents changes in diabetes-related gene expression in a fructose-induced insulin resistant cell model. · Journal of ethnopharmacology
18.PMID: 18761068 (2008) — A review of the taxonomy, ethnobotany, chemistry and pharmacology of Sutherlandia frutescens (Fabaceae). · Journal of ethnopharmacology
19.PMID: 17476314 (2007) — A randomized, double-blind, placebo-controlled trial of Lessertia frutescens in healthy adults. · PLoS clinical trials
20.PMID: 15374599 (2004) — The antioxidant potential of Sutherlandia frutescens. · Journal of ethnopharmacology
21.PMID: 31365763 (2019) — Role of medicinal plants in HIV/AIDS therapy. · Clinical and experimental pharmacology & physiology
22.PMID: 29544492 (2018) — The mutagenic and antimutagenic activity of Sutherlandia frutescens extracts and marker compounds. · BMC complementary and alternative medicine
23.PMID: 22579002 (2012) — Interactions between phytochemical components of Sutherlandia frutescens and the antiretroviral, atazanavir in vitro: implications for absorption and metabolism. · Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques
24.PMID: 26585972 (2015) — Unveiling the anti-inflammatory activity of Sutherlandia frutescens using murine macrophages. · International immunopharmacology
25.PMID: 18808182 (2008) — Cycloartane glycosides from Sutherlandia frutescens. · Journal of natural products
26.PMID: 26186450 (2015) — Consumption of Sutherlandia frutescens by HIV-Seropositive South African Adults: An Adaptive Double-Blind Randomized Placebo Controlled Trial. · PloS one
27.PMID: 34220044 (2021) — Soil nutrient status of KwaZulu-Natal savanna and grassland biomes causes variation in cytokinin functional groups and their levels in above-ground and underground parts of three legumes. · Physiology and molecular biology of plants : an international journal of functional plant biology
28.PMID: 26710108 (2015) — Inhibition of Hedgehog-Signaling Driven Genes in Prostate Cancer Cells by Sutherlandia frutescens Extract. · PloS one
29.PMID: 16939705 (2007) — Anti-diabetic effects of Sutherlandia frutescens in Wistar rats fed a diabetogenic diet. · Journal of ethnopharmacology
30.PMID: 27575007 (2016) — An Investigation into the Immunomodulatory Activities of Sutherlandia frutescens in Healthy Mice. · PloS one