Apple Polyphenols vs Stevia Polyphenols: Which Is More Beneficial for Functional Foods?

Apple polyphenols and stevia polyphenols exhibit significant differences in their botanical origins, chemical composition, and functional properties.

• Apple polyphenols are primarily derived from the peel, flesh, and seeds of apples, with proanthocyanidins, epicatechin, and chlorogenic acid being the principal active constituents. According to a 2023 study in Food Chemistry, the antioxidant activity of apple polyphenols relies chiefly on oligomeric proanthocyanidins and their free radical scavenging capacity. This endows apple polyphenols with broad applications in anti-ageing, immune modulation, and cardiovascular health.

• Stevia polyphenols originate from the leaves of Stevia rebaudiana. Their primary active constituents are stevioside and rebaudioside, which not only provide natural sweetness but also exhibit antioxidant and anti-inflammatory properties. According to a 2022 study in the Journal of Food Science, the polyphenolic compounds in stevia, particularly certain flavonoids and acidic polyphenols, effectively scavenge free radicals within the body, exerting antioxidant effects that contribute to improved metabolic health and immune system function.
• In terms of composition, the antioxidant effects of apple polyphenols are primarily attributed to proanthocyanidins, whereas stevia polyphenols encompass a broader spectrum of flavonoids and glycosides. Furthermore, the additional application of its sweet components confers unique advantages in the field of low-calorie sweeteners.

The extraction methods for apple polyphenols and stevia polyphenols differ, directly impacting extraction efficiency, the stability of active components, and the consistency of the final product.

• Apple polyphenols are typically extracted using low-temperature water-alcohol extraction or ultrasonic-assisted extraction techniques, followed by purification via macroporous resin to enhance recovery rates. According to a 2021 study in the Journal of Agricultural and Food Chemistry, recovery rates for apple polyphenols generally range between 65% and 75%. However, their constituents are particularly susceptible to degradation under high temperatures and exposure to oxygen, necessitating strict control of environmental factors during extraction and storage.
• Stevia polyphenol extraction generally employs aqueous or ethanol extraction methods, combined with concentration techniques to enhance stevioside concentration. A 2022 study in Food Research International indicates stevia polyphenol recovery rates are generally high, reaching 80%-85%. Owing to the robust stability of Stevia's polyphenolic constituents-particularly steviol glycosides-which exhibit minimal susceptibility to oxidative degradation, its extraction process remains relatively stable and well-suited for large-scale production.
• In terms of stability, Stevia polyphenols demonstrate favourable resistance to high temperatures and oxidative environments, whereas apple polyphenols are more prone to degradation, necessitating stricter extraction conditions to ensure long-term efficacy.

Apple polyphenols and stevia polyphenols occupy distinct positions and serve different functional applications within the market.

• Apple polyphenols are extensively utilised in functional beverages, meal replacement powders, and health-conscious snacks, primarily for their antioxidant, anti-ageing, and lipid-regulating properties. According to a 2023 study in Nutrients, apple polyphenols effectively promote cardiovascular health, regulate blood glucose levels, and play a significant role in reducing fat oxidation and enhancing immune responses.

• Stevia polyphenols, conversely, find extensive application in low-calorie foods, sweeteners, and diabetes management products, exhibiting particular advantages in sugar substitution. Stevioside not only provides natural sweetness to foods but is also widely utilised in functional beverages, low-sugar foods, and dietary supplements due to its antioxidant and anti-inflammatory properties. According to a 2022 study in Food Chemistry, stevioside positively impacts metabolic health by regulating blood sugar and reducing inflammatory responses, thereby aiding weight management and diabetes prevention.
• Consequently, apple polyphenols are more suitable for general health foods and beverages, while stevia polyphenols are particularly well-suited for low-calorie foods, weight-loss products, and diabetes management products.

In summary, apple polyphenols and stevia polyphenols exhibit distinct differences in their botanical origins, chemical composition, extraction processes, and functional applications. Apple polyphenols are primarily focused on antioxidant, anti-ageing, and immune-modulating applications, making them suitable for a wide range of daily health management products, particularly in functional beverages and dietary supplements. Stevia polyphenols, conversely, find greater application in low-calorie foods, reduced-sugar products, and diabetes management formulations. Their unique sweetening properties and antioxidant capabilities render them an ideal sugar substitute. When making procurement decisions, manufacturers should rationally select either apple polyphenols or stevia polyphenols based on the product's functional positioning, target market, and relevant regulatory requirements, thereby meeting consumers' growing health demands.

For more details about polyphenol, connect with Serrisha from APPCHEM. (Email: cwj@appchem.cn; +86-138-0919-0407)

Reference

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[3]D. Hyson. "A comprehensive review of apples and apple components and their relationship to human health." Advances in Nutrition (2011).
[4]Josephine Kschonsek, Theresa Wolfram et al. "Polyphenolic Compounds Analysis of Old and New Apple Cultivars and Contribution of Polyphenolic Profile to the In Vitro Antioxidant Capacity." Antioxidants (2018).
[5]Jana Šic Žlabur, S. Voća et al. "Optimization of Ultrasound Assisted Extraction of Functional Ingredients from Stevia Rebaudiana Bertoni Leaves." International Agrophysics (2015).