Overview
Euryale seed, derived from the aquatic plant Euryale ferox, has been used in Traditional Chinese Medicine (TCM) for centuries. Known for its nutritional and medicinal properties, it is often referred to as 'foxnut' or 'Gordon Euryale Seed.' The seeds are harvested from the plant's spiky seed pods and are valued for their high starch content, proteins, and trace minerals. In TCM, Euryale seed is classified as a 'spleen and kidney tonic,' believed to strengthen these organs and improve overall vitality. It is also a popular ingredient in soups, desserts, and health tonics, particularly in East Asian cuisines. The seeds are typically dried and sold whole or powdered for various applications.
Physical and Chemical Properties
Euryale seeds are small, round, and light brown with a hard outer shell. They have a mildly sweet and astringent taste, attributed to their high starch content (approximately 75-80%) and tannins. The seeds also contain proteins (around 9-11%), trace minerals like calcium and phosphorus, and small amounts of flavonoids. When soaked in water, the seeds gradually absorb moisture and soften, making them suitable for cooking. They are not fully soluble in water but release some of their nutrients during prolonged soaking or boiling. The seeds' density is approximately 1.2 g/cm³, and they are stable under normal storage conditions, though prolonged exposure to moisture can lead to mold growth.
Main Applications
Euryale seeds are primarily used in Traditional Chinese Medicine (TCM) to tonify the spleen and kidneys, treat chronic diarrhea, and reduce excessive bodily discharges. They are often combined with other herbs like lotus seeds and yam in TCM formulations. In culinary applications, the seeds are added to soups, congees, and desserts for their texture and nutritional benefits. In the health supplement industry, Euryale seed extracts are used in capsules and powders for their purported benefits in improving digestion and boosting energy. The seeds are also studied for their potential antioxidant and anti-inflammatory properties, though more research is needed to confirm these effects.
Safety and Storage
Euryale seeds are generally safe for consumption but should be used in moderation. Excessive intake may cause digestive discomfort, such as bloating or constipation, due to their high starch and astringent properties. Individuals with spleen or kidney deficiencies should consult a TCM practitioner before use. For storage, keep the seeds in an airtight container in a cool, dry place away from direct sunlight. Properly stored, they can last up to two years. Avoid moisture, as it can lead to mold growth. For commercial procurement, ensure suppliers provide seeds free from pests, discoloration, or off-odors.
B2B Procurement Guide
When sourcing Euryale seeds for B2B purposes, prioritize suppliers with certifications for organic or pesticide-free cultivation. Key quality indicators include uniform size, plumpness, and a light brown color without dark spots. Request lab test reports for heavy metals and microbial contamination if used in supplements or medicines. Price varies based on origin (e.g., Chinese vs. Indian varieties) and processing (whole seeds vs. powdered form). Bulk purchases (100+ kg) typically reduce costs by 10-20%. Establish long-term contracts with reliable suppliers to ensure consistent quality and avoid seasonal price fluctuations. For international shipments, confirm compliance with import regulations regarding plant-based products.