Propolis is formed from plant resins, bud exudates, and other plant-derived substances collected by honeybees and mixed with wax, secretions, and small amounts of pollen. Its nutritional significance does not lie in protein, fat, or carbohydrates, which contribute very little at usual daily intakes. Its value lies in its high concentration of polyphenols, flavonoids, phenolic acids, prenylated phenols, and aromatic accompanying compounds. Poplar propolis represents the European flavonoid and CAPE type, while Brazilian green propolis represents the Baccharis and artepillin C type.
Standardization and Quality Control
For high-quality propolis products, botanical origin, balsam fraction, total phenols, total flavonoids, and characteristic marker substances are essential. In poplar propolis, pinocembrin, chrysin, galangin, pinobanksin, and CAPE are important markers; in Brazilian green propolis, p-coumaric acid derivatives, drupanin, baccharin, and artepillin C are characteristic. ISO 24381:2023 describes international minimum requirements for raw propolis, including ethanol-extractable substances, moisture, ash, total phenols, total flavonoids, HPLC marker profiles, and DPPH activity. However, there is no specific EU or Swiss compositional standard for propolis as a food supplement; voluntary quality claims must be analytically supported.
Polyphenols
Polyphenols are secondary plant compounds found in berries, herbs, spices, tea, coffee, cocoa, olive oil, and many other plant-based foods. Modern nutrition research no longer views them merely as direct antioxidants, but as bioactive substances associated with cellular signalling, vascular function, metabolism, microbiota, and bioavailability. Propolis fits into this framework because it provides particularly high amounts of phenolic substances per unit weight.
The paper reports approximately 14,250–21,130 mg polyphenols per 100 g for poplar propolis and approximately 9,923–11,877 mg per 100 g for Brazilian green propolis. This places propolis in the range of highly polyphenol-rich herbs and spices and clearly above many common foods. Its antioxidant significance is based on the density and diversity of phenolic compounds. Poplar propolis provides mainly flavonoids, phenolic acids, and CAPE-related compounds; green propolis adds p-coumaric acid derivatives, prenylated phenols, baccharin, drupanin, and artepillin C.
Hеalth
Propolis provides a natural multi-substance matrix that has been associated in experimental studies with antioxidant and regulatory cellular functions. For oral health, oral microbial balance is particularly relevant: studies describe associations with dental plaque, caries-related models, gum health, periodontal parameters, and oral microorganisms. Polyphenols are also related to healthy immune function because they can interact with immune cells, intestinal epithelium, intestinal mucosa, and microbiota.
Healthy aging includes the preservation of cell function, energy production, metabolic balance, immune resilience, microbiome balance, and cognitive performance. In research, propolis has been associated with antioxidant cell protection, mitochondrial function, cellular stress resistance, autophagy, proteostasis, neuronal signalling, microbiome, and metabolic regulation. The strongest interpretation remains: propolis is not an isolated anti-aging agent, but a polyphenol-rich food supplement that can complement a plant-based diet.
Product Requirements and Legal Classification
A propolis product may be placed on the Swiss market as a food supplement if it is safe, correctly labelled, and marketed without therapeutic or disease-related claims. Food supplements are a special food category with additional requirements: dosage form, clear recommended daily intake, complete labelling, and documented self-monitoring.
Traditional alcoholic propolis extracts sold directly by beekeepers are therefore not automatically food supplements; they may be offered as propolis-containing foods or traditional beekeeping products if they are safe, hygienically produced, and correctly labelled.
Poplar and green propolis are natural, polyphenol-rich bee products with an exceptionally dense matrix of bioactive plant compounds. Their significance does not lie in classical nutritional value, but in the high concentration of secondary plant substances. Propolis can complement a plant-based, polyphenol-rich diet and provides a broad spectrum of bioactive substances associated in research with antioxidant properties, healthy immune function, oral microbial balance, oral health, and biological processes of healthy aging.
Table of Contents
1. Propolis as a Concentrated Source of Bioactive Plant Compounds
2. Standardization and Quality Control
3. Polyphenols and Nutrition
4. Polyphenol Content and Antioxidant Significance
5. Cell Protection, Microbiome, Oral Health, and Immune Function
6. Propolis as a Food Supplement for Healthy Aging
7. Product Requirements and Legal Classification
8. Overall Assessment