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| Hibiscus sabdariffa (commonly known as Roselle) It is rich in bioactive components such as polyphenols, anthocyanins, flavonoids, organic acids, and other antioxidants. Hibiscus sabdariffa is rich in antioxidants and bioactive compounds that show potential anti-cancer effects by reducing oxidative stress, inhibiting cell proliferation, inducing apoptosis, and modulating inflammatory pathways.
Hibiscus sabdariffa — commonly known as roselle, is an edible medicinal plant whose calyces and leaves contain anthocyanins, polyphenols, flavonoids, phenolic acids, and organic acids. It is classified as a botanical food/nutraceutical and plant-extract modality rather than a defined anticancer drug. Standard abbreviations include HS and H. sabdariffa. The calyx is the predominant food and beverage source, whereas several anticancer studies have used leaf extracts, anthocyanin-rich fractions, or polyphenol-enriched preparations that are not compositionally equivalent to ordinary hibiscus tea. Important constituents include delphinidin-3-sambubioside, cyanidin-3-sambubioside, protocatechuic acid, and other polyphenols. -Calyx — the thick, fleshy red structure surrounding the base of the flower and later the seed capsule. This is the main material used for hibiscus tea, beverages, extracts, and most commercial supplements. It is especially rich in anthocyanins, organic acids, and polyphenols. Primary mechanisms (ranked):
Bioavailability / PK relevance: Hibiscus anthocyanins are orally absorbed but have low systemic bioavailability and are rapidly metabolized and eliminated. Human pharmacokinetic studies demonstrate circulating anthocyanin-derived compounds after oral Hibiscus extract, but exposure to intact parent anthocyanins is substantially lower than concentrations commonly used in mechanistic cell-culture studies. Extract composition, plant part, cultivar, processing, and extraction method materially affect exposure. In-vitro vs systemic exposure relevance: Many anticancer experiments use approximately hundreds of µg/mL to mg/mL of crude or polyphenol-enriched extract, or high-µM to millimolar concentrations of individual phenolic compounds. These concentrations generally exceed plausible circulating concentrations following ordinary dietary Hibiscus consumption. Direct translation of in-vitro anticancer potency to oral tea or supplement use is therefore poor. Local gastrointestinal exposure may be considerably higher than systemic exposure. Clinical evidence status: Cancer evidence is predominantly preclinical, consisting of cell-culture studies and limited animal models; there is no established human anticancer efficacy and no validated Hibiscus anticancer dosing regimen. Human RCT evidence is considerably stronger for blood-pressure reduction and some cardiometabolic effects than for cancer treatment. Hibiscus should therefore be categorized as preclinical for anticancer therapy, not as an established cancer adjunct. Oral Hibiscus preparations are generally well tolerated in short-term human studies, but clinically relevant hypotensive and glucose-lowering effects can occur, creating potential additive effects with antihypertensive or antidiabetic therapy. Hibiscus sabdariffa Cancer-Relevant Mechanisms
P: 0–30 min R: 30 min–3 hr G: >3 hr |
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| Caspases are a cysteine protease that speed up a chemical reaction via pointing their target substrates following an aspartic acid residue.1 They are grouped into apoptotic (caspase-2, 3, 6, 7, 8, 9 and 10) and inflammatory (caspase-1, 4, 5, 11 and 12) mediated caspases. Caspase-1 may have both tumorigenic or antitumorigenic effects on cancer development and progression, but it depends on the type of inflammasome, methodology, and cancer. Catalase is an enzyme found in nearly all living cells exposed to oxygen. Its primary role is to protect cells from oxidative damage by catalyzing the conversion of hydrogen peroxide (H₂O₂), a potentially damaging byproduct of metabolism, into water (H₂O) and oxygen (O₂). This detoxification process is crucial because excess H₂O₂ can lead to the formation of reactive oxygen species (ROS) that damage proteins, lipids, and DNA. Catalase and Cancer Oxidative Stress and Cancer: Cancer cells often experience increased levels of oxidative stress due to rapid proliferation and metabolic changes. This stress can lead to DNA damage, promoting tumorigenesis. Catalase helps mitigate oxidative stress, and its expression can influence the survival and proliferation of cancer cells. Expression Levels in Different Cancers: Overexpression: In some cancers, such as breast cancer and certain types of leukemia, catalase may be overexpressed. This overexpression can help cancer cells survive in oxidative environments, potentially leading to more aggressive tumor behavior. Downregulation: Conversely, in other cancers, such as colorectal cancer, reduced catalase expression has been observed. This downregulation can lead to increased oxidative stress, contributing to tumor progression and metastasis. Prognostic Implications: Survival Rates: Studies have shown that high levels of catalase expression can be associated with poor prognosis in certain cancers, as it may enable cancer cells to resist apoptosis (programmed cell death) induced by oxidative stress. Some types of cancer cells have been reported to exhibit lower catalase activity, possibly increasing their vulnerability to oxidative damage under certain conditions. This vulnerability has even been exploited in some therapeutic strategies (for example, approaches that generate excess H₂O₂ or other ROS specifically targeting cancer cells have been researched). |
| 7359- | HibSad, | Novel Insight into the Cellular and Molecular Signalling Pathways on Cancer Preventing Effects of Hibiscus sabdariffa: A Review - PubMed |
| - | Review, | Var, | NA |
| 7358- | HibSad, | Chemopreventive properties and molecular mechanisms of the bioactive compounds in Hibiscus sabdariffa Linne |
| - | Review, | Var, | NA |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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