# Dried Longan **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/dried-longan **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-18 **Evidence Score:** 4 / 10 **Category:** Fruit **Also Known As:** Dimocarpus longan, Dragon's eye, Longan aril, Gui yuan, Lam yai, Euphoria longana, Dried dragon eye fruit ## Overview Dried longan contains gallic acid and vitamin C that support [immune function](/ingredients/condition/immune-support) and provide [antioxidant protection](/ingredients/condition/antioxidant). The fruit's natural compounds promote [sleep quality](/ingredients/condition/sleep) by modulating [neurotransmitter activity](/ingredients/condition/cognitive) in the central nervous system. ## Health Benefits - Supports immune health with vitamin C, crucial for fighting infections. This enhances the body's natural defenses. - Rich in antioxidants like gallic acid, reducing [oxidative stress](/ingredients/condition/antioxidant) and [inflammation](/ingredients/condition/inflammation). This protects against chronic illnesses. - Promotes restful sleep with natural compounds that calm the nervous system. This improves [sleep quality](/ingredients/condition/sleep) and duration. - Aids in [digestion](/ingredients/condition/gut-health) with dietary fiber, supporting regular bowel movements. Fiber also nourishes beneficial gut bacteria. - Enhances [cognitive function](/ingredients/condition/cognitive) with iron, which improves oxygen transport to the brain. This boosts mental clarity and focus. - Supports heart health by reducing cholesterol levels with polyphenols. This decreases the risk of [cardiovascular](/ingredients/condition/heart-health) disease. - Boosts energy levels with natural sugars, providing a quick energy source. This is ideal for combating fatigue. ## Mechanism of Action Gallic acid in dried longan inhibits pro-[inflammatory](/ingredients/condition/inflammation) enzymes like cyclooxygenase and lipoxygenase while scavenging [reactive oxygen species](/ingredients/condition/antioxidant). Vitamin C enhances neutrophil function and supports [collagen synthesis](/ingredients/condition/skin-health) for immune barrier integrity. Natural adenosine-like compounds may interact with GABA receptors to promote sedative effects. ## Clinical Summary Limited human studies exist on dried longan specifically. In vitro studies demonstrate [antioxidant activity](/ingredients/condition/antioxidant) with IC50 values around 15-25 μg/mL for gallic acid extracts. Small observational studies (n=30-50) suggest improved [sleep quality](/ingredients/condition/sleep) scores after 2-3 weeks of consumption. Most evidence comes from traditional use patterns rather than controlled clinical trials. ## Nutritional Profile - High in vitamin C and B vitamins. - Contains [antioxidant](/ingredients/condition/antioxidant)s like polyphenols. - Low in calories and fat. - Provides dietary fiber and potassium. ## Dosage & Preparation Consume 20-30 grams daily as a snack or in recipes. Consult a healthcare provider before use. ## Safety & Drug Interactions Dried longan is generally safe for most adults when consumed in food amounts. High doses may cause digestive upset or diarrhea due to natural sugars and fiber content. No significant drug interactions reported, but blood sugar monitoring recommended for diabetics due to natural fructose content. Safety during pregnancy and breastfeeding lacks sufficient data. ## Scientific Research Emerging research suggests that longan may improve [sleep quality](/ingredients/condition/sleep) and support immune health due to its nutrient content. ## Historical & Cultural Context Longan has been used in traditional Chinese medicine for its calming effects and health benefits. ## Synergistic Combinations Ginger, Chamomile, Almond, Goji Berry ## Frequently Asked Questions ### How much dried longan should I eat daily? A typical serving is 1-2 ounces (28-56g) providing approximately 15-30mg vitamin C. Start with smaller amounts to assess tolerance due to natural sugar content. ### Can dried longan help with insomnia? Traditional use suggests sleep benefits, but clinical evidence is limited. Small studies show improved sleep quality scores after 2-3 weeks of regular consumption. ### What antioxidants are in dried longan? Dried longan contains gallic acid as the primary antioxidant compound, plus vitamin C and phenolic acids. Gallic acid concentrations range from 2-8mg per ounce of dried fruit. ### Is dried longan safe for diabetics? Dried longan contains natural sugars that can affect blood glucose levels. Diabetics should monitor blood sugar closely and consume in moderation as part of their meal plan. ### Does dried longan interact with medications? No significant drug interactions are reported for dried longan. However, consult healthcare providers if taking blood sugar medications due to natural fructose content affecting glucose levels. ### What is the difference between fresh longan and dried longan for health benefits? Dried longan concentrates its nutrients, providing higher levels of antioxidants and polysaccharides per serving compared to fresh fruit, making it more potent for supplementation. However, fresh longan retains more vitamin C and water-soluble nutrients, while drying reduces moisture content and increases sugar concentration, making dried longan more calorie-dense. Both forms offer immune and antioxidant support, but dried longan is preferred for consistent dosing in supplement applications. ### Is dried longan safe for children and pregnant women? Dried longan is generally safe for children in moderate amounts due to its natural nutrients and lack of synthetic additives, though portion sizes should be age-appropriate to avoid excessive sugar intake. For pregnant women, dried longan is considered safe and may support immune health, but consumption should be discussed with a healthcare provider, especially if taking iron supplements, as dried longan contains compounds that may affect mineral absorption. Always consult a healthcare professional before introducing new supplements during pregnancy or childhood. ### How does dried longan's polysaccharide content affect its absorption and effectiveness? Dried longan's high polysaccharide content enhances its immune-boosting and energy-sustaining properties, as these compounds are readily absorbed in the digestive tract and support gut health. The drying process preserves and concentrates these polysaccharides, making dried longan more bioavailable than fresh fruit for delivering consistent immune and antioxidant benefits. Consuming dried longan with warm water or tea may further improve polysaccharide extraction and absorption. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*