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Pomegranate Peel
Punica granatum
Astringent for diarrhea in ancient medicine worldwide
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 29 PubMed articles · model: gemma4:31b
Summary
Pomegranate peel (Punica granatum) is a byproduct of fruit processing rich in bioactive polyphenols with demonstrated antioxidant, antimicrobial, and anticancer properties [PMID:35128669, PMID:37810640].
Background
Pomegranate peel (PoP) is the inedible outer part of the Punica granatum fruit, typically accounting for 26-40% of the total fruit weight and often treated as agricultural waste [PMID:35757262, PMID:37324891].
Traditional uses
Pomegranate has long been used for medical purposes, with its medicinal value documented in several ancient texts [PMID:37748009].
Active compounds
The peel is a rich source of polyphenols, including ellagitannins, flavonoids (such as anthocyanins), phenolic acids (gallic acid, ellagic acid, caffeic acid), and hydrolyzable tannins like punicalagin and punicalin [PMID:34315399, PMID:35128669, PMID:37810640, PMID:38370077]. It also contains polysaccharides, dietary fiber, vitamins, and minerals [PMID:35757262, PMID:39178695].
Mechanism of action
Bioactive components reduce oxidative stress and lipid peroxidation by neutralizing reactive oxygen species, increasing antioxidant enzyme activities, and inducing metal chelation [PMID:23684435]. In cancer models, they modulate signaling pathways (NF-κB, PI3K/AKT/mTOR, Wnt), induce apoptosis, cause cell cycle arrest, and down-regulate anti-apoptotic genes and pro-inflammatory cytokines [PMID:29729421, PMID:36670990]. Polysaccharides may act via SIRT1/AMPK activation to suppress SREBP-1c and FAS [PMID:42046378].
Clinical evidence
Evidence CType 2 Diabetes
Pomegranate fractions (including peels) are linked to prevention and treatment by reducing oxidative stress and lipid peroxidation [PMID:23684435]
Evidence CCancer
Peel extracts show antineoplastic activity in cervical cancer models and potential as antitumorogenic agents against breast cancer [PMID:36670990, PMID:25857627]
Evidence CBacterial Infections
Extracts exhibit antibacterial activity against MSSA, MRSA, S. mutans, E. coli, P. aeruginosa, and K. pneumoniae [PMID:38144901]
Evidence DDyslipidemia/Obesity
A neutral triple-helix polysaccharide from the peel reduced weight gain, epididymal fat, and corrected HFD-induced dyslipidemia in mice [PMID:42046378]
Evidence DViral Infection (HSV-1)
Pomegranate peel extract inhibited HSV-1 adsorption to cell surfaces and viral DNA accumulation [PMID:36560643]
Evidence DParasitic Infections
Safety & adverse effects
Polyphenolic compounds are generally considered to have no harmful effects due to natural biocompatibility and safety [PMID:36632073]. However, pomegranate peel is noted for its astringency and anti-nutritional properties [PMID:25529700].
Pregnancy & lactation
No adverse reactions to maternal pomegranate ingestion in breastfed infants have been observed; administration of pomegranate juice to nursing mothers increased the antioxidant content of breastmilk [PMID:37748009].
Evidence summary
The evidence is primarily based on in vitro studies, animal models, and narrative reviews (Levels C and D). While there is strong preclinical evidence for antioxidant and antimicrobial activity, high-level clinical trial data (Level A/B) specifically for the peel are lacking in the provided text.
PubMed sources
1.PMID: 37748009 (2006) — Pomegranate (Punica granatum L): A Fruitful Fountain of Remedial Potential. · Cureus
2.PMID: 23684435 (2013) — Pomegranate and type 2 diabetes. · Nutrition research (New York, N.Y.)
3.PMID: 34315399 (2022) — An Insight into Anticancer Bioactives from Punica granatum (Pomegranate). · Anti-cancer agents in medicinal chemistry
4.PMID: 29729421 (2018) — Possible use of Punica granatum (Pomegranate) in cancer therapy. · Pharmacological research
5.PMID: 25529700 (2015) — Pomegranate peel and peel extracts: chemistry and food features. · Food chemistry
Peel extracts inhibited the growth of piroplasm parasites (e.g., Babesia bovis) in vitro and in vivo [PMID:35774222] and caused cytoskeleton damage in Giardia lamblia trophozoites in vitro [PMID:35502204]
Evidence CSkin Conditions
Peel extracts are investigated for antioxidant, anti-inflammatory, antimicrobial, and antiaging effects, as well as positive effects on psoriasis and skin repair [PMID:38675119]
6.PMID: 35128669 (2022) — The bioactivity and applications of pomegranate peel extract: A review. · Journal of food biochemistry
7.PMID: 38675119 (2024) — Punica granatum L. (Pomegranate) Extracts and Their Effects on Healthy and Diseased Skin. · Pharmaceutics
8.PMID: 26232244 (2016) — A Review Study on Punica granatum L. · Journal of evidence-based complementary & alternative medicine
9.PMID: 39178695 (2024) — Punica granatum L. polysaccharides: A review on extraction, structural characteristics and bioactivities. · Carbohydrate research
10.PMID: 37810640 (2023) — Pomegranate Peel Phytochemistry, Pharmacological Properties, Methods of Extraction, and Its Application: A Comprehensive Review. · ACS omega
11.PMID: 35757262 (2022) — Pomegranate Peel as a Source of Bioactive Compounds: A Mini Review on Their Physiological Functions. · Frontiers in nutrition
12.PMID: 34690043 (2021) — Ayurveda intervention for brass-induced heavy metal toxicity: A report from the single-arm pilot study. · Journal of Ayurveda and integrative medicine
13.PMID: 37324891 (2023) — Nutritional importance and industrial uses of pomegranate peel: A critical review. · Food science & nutrition
14.PMID: 31298147 (2019) — Composition and Potential Health Benefits of Pomegranate: A Review. · Current pharmaceutical design
15.PMID: 35650986 (2022) — Pomegranate peel extract - A natural bioactive addition to novel active edible packaging. · Food research international (Ottawa, Ont.)
16.PMID: 36560643 (2022) — Punica granatum Peel and Leaf Extracts as Promising Strategies for HSV-1 Treatment. · Viruses
17.PMID: 25857627 (2015) — Punica granatum and its therapeutic implications on breast carcinogenesis: A review. · BioFactors (Oxford, England)
18.PMID: 36632073 (2023) — Potential of phenolic compounds from pomegranate (Punica granatum L.) by-product with significant antioxidant and therapeutic effects: A narrative review. · Saudi journal of biological sciences
20.PMID: 42046378 (2026) — A Neutral Triple-Helix Pomegranate (Punica granatum) Peel Polysaccharide with Lipid-Lowering and Prebiotic Activities. · Journal of agricultural and food chemistry
21.PMID: 35774222 (2022) — Pomegranate (Punica granatum) Peel Inhibits the In Vitro and In Vivo Growth of Piroplasm Parasites. · Journal of parasitology research
22.PMID: 38144901 (2023) — Therapeutic Potential of Punica granatum and Isolated Compounds: Evidence-Based Advances to Treat Bacterial Infections. · International journal of microbiology
23.PMID: 38370077 (2024) — Phytochemical profile, nutritional composition of pomegranate peel and peel extract as a potential source of nutraceutical: A comprehensive review. · Food science & nutrition
24.PMID: 36670990 (2023) — Anticancer Effect of Pomegranate Peel Polyphenols against Cervical Cancer. · Antioxidants (Basel, Switzerland)
25.PMID: 36920686 (2023) — Exploring the Potential of Pomegranate Peel Extract as a Natural Food Additive: A Review. · Current nutrition reports
26.PMID: 35502204 (2022) — Polyphenolic extract from Punica granatum peel causes cytoskeleton-related damage on Giardia lamblia trophozoites in vitro. · PeerJ
27.PMID: 28946708 (2017) — Diverse Phytochemicals and Bioactivities in the Ancient Fruit and Modern Functional Food Pomegranate (Punica granatum). · Molecules (Basel, Switzerland)
28.PMID: 37646704 (2023) — Obtaining polyphenolic extracts from pomegranate peel (Punica granatum) to evaluate the bactericide and antioxidant activity. · Anais da Academia Brasileira de Ciencias