Nutritive Values of Persian Manna: A Comprehensive Analysis

Abstract

Persian Manna, a unique group of natural compounds derived from insect activity on host plants, is a cornerstone of Iranian traditional medicine, valued for its medicinal and nutritional benefits. This study evaluates the mineral content of Persian Manna, focusing on four prominent varieties: Taranjebin, Shir-Khesht, Bid-Khesht, and Gaz-Alafi. Using Flame Emission Spectrophotometry, we analyzed essential elements, including iron, zinc, and copper. Results indicate that Gaz-Alafi is exceptionally rich in iron and zinc, while Bid-Khesht exhibits the highest copper content. These findings underscore the nutritive value of Persian Manna, positioning it as a potential dietary supplement for addressing mineral deficiencies.

Table of Contents

1. Introduction to Persian Manna
2. Historical Context of Persian Manna
3. Varieties of Persian Manna
   • Taranjebin: A Key Variety of Persian Manna
   • Shir-Khesht: Nutritional and Medicinal Properties
   • Bid-Khesht: A Cost-Effective Persian Manna
   • Gaz-Alafi: Mineral-Rich Persian Manna
4. Ecological Factors in Persian Manna Production
5. Study Design for Analyzing Persian Manna
   • Collection of Persian Manna Samples
   • Analytical Methods for Persian Manna
6. Results and Discussion on Persian Manna
   • Copper Content in Persian Manna
   • Zinc Content in Persian Manna
   • Iron Content in Persian Manna
7. Potential Applications of Persian Manna in Modern Nutrition
8. Comparative Analysis of Persian Manna with Other Sweeteners
9. Future Research Directions for Persian Manna
10. Conclusion: The Nutritive Value of Persian Manna
11. Acknowledgments
12. References

Introduction to Persian Manna

Persian Manna, known as “Angabin” in Persian, refers to a collection of sweet, natural compounds produced through insect activity on young host plant organs. These compounds have been integral to Iranian traditional medicine for centuries, valued for their laxative, antipyretic, expectorant, and anti-hyperbilirubinemia properties. The nutritive value of Persian Manna, particularly its mineral content, has garnered increasing attention in modern nutritional science due to its potential as a bioavailable source of iron, zinc, and copper.

This study focuses on the mineral composition of four widely used varieties of Persian Manna: Taranjebin, Shir-Khesht, Bid-Khesht, and Gaz-Alafi. These varieties, each associated with specific plants and insects, are commercially significant in Iranian herbal markets. By quantifying their iron, zinc, and copper content, we aim to establish Persian Manna as a valuable dietary supplement for addressing mineral deficiencies in vulnerable populations, such as vegetarians, pregnant women, and infants.

The global demand for natural and functional foods has spotlighted Persian Manna as a unique product. Unlike refined sugars, Persian Manna offers a complex matrix of saccharides, minerals, and bioactive compounds, making it a promising candidate for modern nutritional applications. This article provides a comprehensive analysis of the nutritive value of Persian Manna, combining historical context, scientific data, and potential applications.

Historical Context of Persian Manna

Persian Manna has a rich history in Iranian culture, dating back to ancient Persia, where it was revered as a medicinal and nutritional substance. Historical texts, such as those by Avicenna, describe Persian Manna as a remedy for digestive disorders, fever, and jaundice. The term “Angabin,” meaning honey-like, reflects its sweet taste and sticky texture, which made it a popular ingredient in herbal concoctions.

The production of Persian Manna is closely tied to ecological interactions between specific insects and host plants. Local communities in regions like Khorasan, Tabriz, and western Iran have traditionally harvested Persian Manna, leveraging the unique environmental conditions of these areas. Each variety of Persian Manna is associated with specific plants and insects, contributing to its cultural significance.

In modern times, the nutritive value of Persian Manna has attracted scientific interest due to its potential as a functional food. Its mineral-rich composition distinguishes it from other natural sweeteners like honey or maple syrup. This study builds on this historical foundation, providing a detailed analysis of the mineral content of Persian Manna to validate its traditional uses.

Varieties of Persian Manna

The diversity of Persian Manna varieties reflects the complex ecological interactions in Iran’s varied landscapes. Below, we describe the four most prominent types of Persian Manna, their botanical origins, insect associations, and traditional uses.

Taranjebin: A Key Variety of Persian Manna

Taranjebin, also known as Alhagi manna or Caspian manna, is the most economically significant variety of Persian Manna. This semi-liquid, resinous, sweet substance forms on the leaves and branches of camel’s thorn shrubs (Alhagi persarum Boiss. & Bushe and A. mannifera Desf., Fabaceae). Its production is influenced by environmental factors and the froghopper Poophilus nebulosus Leth.

Taranjebin is harvested in regions like Khorasan, Tabriz, and Booshehr during the summer months. In Persian ethnomedicine, Taranjebin is used to relieve fever, cough, and thirst, and as a mild laxative for neonatal jaundice. Studies confirm its bilirubin-lowering effects without toxicity in mice. The nutritive value of Taranjebin lies in its saccharide and mineral content.

Shir-Khesht: Nutritional and Medicinal Properties

Shir-Khesht is produced through the interaction of the insect Scolytus rugolosus Mull. with Cotoneaster species (Rosaceae). The larvae create tunnels under the plant’s bark, causing the exudation of a sweet substance that hardens into yellowish-white granules. Shir-Khesht production depends on insect activity, as unattacked shrubs do not produce manna.

The primary component of Shir-Khesht is mannitol, with smaller amounts of hexose, fructose, glucose, saccharose, mucilage, and resin. It is used to treat jaundice in newborns and is claimed to protect against radiation and serve as an anticancer agent. The mineral content of Shir-Khesht enhances its nutritive value.

Bid-Khesht: A Cost-Effective Persian Manna

Bid-Khesht is a white, hard, and amorphous sweet product formed by the willow giant aphid (Tuberolachnus salignus Gmel.) on Salix species. Its sweetness is derived from saccharose, fructose, and glucose, making it a cost-effective alternative to Shir-Khesht. In Iranian traditional medicine, Bid-Khesht is used to relieve fever, constipation, and oral candidiasis.

The mineral content of Bid-Khesht, particularly its high copper levels, positions it as a valuable dietary supplement. Its accessibility makes it a popular choice for herbalists and consumers seeking affordable Persian Manna.

Gaz-Alafi: Mineral-Rich Persian Manna

Gaz-Alafi, or “Kurdish Gaz,” is a hard, resinous, sweet product harvested from oak forests in western Iran on Quercus species. It is produced by insects like Thelaxes suberi Del. and Tuberculoides annulatus Hart. Gaz-Alafi contains glucose, fructose, saccharose, and polysaccharides.

Traditionally, Gaz-Alafi is used as a demulcent, febrifuge, analgesic, and for treating chickenpox. Its high iron and zinc content suggests significant potential for addressing mineral deficiencies.

Ecological Factors in Persian Manna Production

The production of Persian Manna is influenced by ecological factors such as climate, soil composition, and insect-plant interactions. Taranjebin production, for example, is limited to warm, arid climates where camel’s thorn shrubs thrive. Soil composition plays a critical role in the mineral content of Persian Manna, with plants in mineral-rich soils transferring elements to insects.

Seasonal variations affect manna production, with most varieties harvested during summer when insect activity peaks. Sustainable harvesting practices are essential to maintain the ecological balance required for Persian Manna production. Future research should explore these factors to ensure long-term sustainability.

Study Design for Analyzing Persian Manna

Collection of Persian Manna Samples

One hundred samples of each Persian Manna variety (Taranjebin, Shir-Khesht, Bid-Khesht, and Gaz-Alafi) were collected from 20 herbal markets in Tehran in July 2012. The samples were authenticated by botanical experts to ensure consistency in the analysis of their nutritive value.

Analytical Methods for Persian Manna

Each sample was oven-dried at 60°C, ground to pass through a 60-mesh sieve, and stored in high-density polyethylene bottles. To prevent contamination, glassware and containers were washed, soaked in 10% HNO3, and dried. One gram of each sample was wet-digested with a 6:1 mixture of HNO3 and HCl, heated until a white residue was obtained, and diluted to 10 ml.

The samples were analyzed using a Shimadzu AA-6200 Flame Emission Spectrophotometer to measure zinc, iron, and copper concentrations. All procedures adhered to AOAC guidelines, with a coefficient of variation below 2.5%.

Results and Discussion on Persian Manna

The nutritive value of Persian Manna was evaluated through its mineral content, as summarized below:

Copper Content in Persian Manna

Copper supports enzyme activity, bone maintenance, and red blood cell production. Bid-Khesht and Shir-Khesht have the highest copper concentrations (33.9141 ± 2.67 mg/kg), followed by Gaz-Alafi (30.5 ± 2.0 mg/kg) and Taranjebin (23.3075 ± 1.55 mg/kg). These levels align with WHO recommendations, suggesting Persian Manna’s role in supporting metabolic functions.

Zinc Content in Persian Manna

Zinc is vital for immune function and wound healing. Gaz-Alafi has the highest zinc content (20.6221 ± 1.2435 mg/kg), followed by Shir-Khesht, Taranjebin, and Bid-Khesht. The bioavailability of zinc in Persian Manna enhances its potential as a dietary supplement for addressing deficiencies.

Iron Content in Persian Manna

Iron is essential for hemoglobin formation and oxygen transport. Gaz-Alafi has the highest iron content (1730.0396 ± 11.6532 mg/kg), followed by Taranjebin, Bid-Khesht, and Shir-Khesht. This makes Persian Manna a promising candidate for combating anemia.

Potential Applications of Persian Manna in Modern Nutrition

The nutritive value of Persian Manna offers significant potential in modern nutrition. Gaz-Alafi’s high iron and zinc content could be used in fortified foods for populations at risk of deficiencies. Persian Manna’s saccharide profile provides a natural energy source, while its bioactive compounds enhance its health benefits.

Comparative Analysis of Persian Manna with Other Sweeteners

Persian Manna’s unique composition distinguishes it from honey, maple syrup, and agave nectar. Its high iron and zinc content surpasses that of honey (0.5-5 mg/kg iron) and maple syrup, making it a superior choice for addressing mineral deficiencies.

Future Research Directions for Persian Manna

Future studies should explore the bioavailability of minerals in Persian Manna and its long-term effects on health. Research on sustainable harvesting practices is also essential to ensure the availability of Persian Manna.

Conclusion: The Nutritive Value of Persian Manna

Persian Manna, with its rich mineral content, offers significant nutritional benefits. Gaz-Alafi’s high iron and zinc levels make it ideal for addressing anemia, while Bid-Khesht’s copper content supports metabolic functions. Incorporating Persian Manna into diets can enhance health outcomes, particularly for populations at risk of deficiencies.

Persian Manna

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ACKNOWLEDGMENTS

Supports from Pharmaceutical Sciences Branch, Islamic Azad University (IAU) is gratefully acknowledged.

Authors: Saeedeh Yazdanparats, Parisa Ziarati and Jinous Asgarpanah

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