I. Product Definition
Freeze-dried yam powder is a powder product made from fresh yams (mostly the iron rod yams from Jiaozuo, Henan Province) through vacuum freeze-drying (FD) technology. It is a high-value-added healthy food ingredient that is both medicinal and edible.
Ii. Core Process (Low-temperature Freshness Lock)
（1）Material selection and cleaning: Select thick and unrotten iron rod yams and clean them to remove impurities.
（2）Peeling and color protection: Peel with warm water, and use vitamin C and citric acid for color protection to prevent oxidation and blackening.
（3）Fresh steaming and maturation: Steam at a low temperature of 58-68 ℃ to inactivate enzymes and stimulate active ingredients.
（4）Pre-freezing: Rapidly freeze at around -40℃ for 2.5 to 3.5 hours to form ice crystals.
（5）Vacuum freeze-drying: Heating and sublimation under high vacuum (8-18Pa), ice crystals directly turn into gas and are discharged, with moisture content reduced to ≤4%.
（6）Ultrafine grinding: Low-temperature grinding to 120-150 mesh, with fine powder texture and easy solubility.
Iii. Nutrition and Active Ingredients (High Retention）
（1）The freeze-drying process is carried out at a low temperature throughout (≤25℃), avoiding the loss of heat-sensitive substances. The retention rate of core components is significantly higher than that of drying/sun-drying.
（2）Polysaccharides (mucoprotein) : Retention rate over 93%, protects gastric mucosa and regulates intestinal flora.
（3）Dioscin: Retention rate 95% – 97%, antioxidant and immune-boosting.
（4）Amylase/polyphenol oxidase: Highly active, it AIDS digestion and nourishes the spleen and stomach.
（5）Vitamin C/B complex: Less loss, supplementing daily nutrition.
Minerals: Potassium, calcium, magnesium, zinc, etc. are completely retained.
0 Additives: No sucrose, no flavoring, no preservatives, no maltodextrin.
Iv. Taste and Characteristics
（1）Powdery: Off-white/light yellow, fine and fluffy, without rough particles.
（2）Brewing: Dissolves in warm water, fully rehydrated within 3 minutes, without lumps or residue, with a smooth and fragrant taste.
（3）Stability: Moisture content ≤4%, no deterioration at room temperature for 18 to 24 months, easy to store and transport.
V. Core Efficacy (Food and Medicine Sharing the Same Origin
（1）Strengthening the spleen and nourishing the stomach: Amylase promotes digestion, mucoprotein protects the gastric mucosa, and improves spleen deficiency with poor appetite and loose stools.
（2）Moistening the lungs and promoting saliva production: It nourishes dryness in the lungs, relieves dry cough and dry throat, and is suitable for autumn and winter as well as smokers.
（3）Tonifying the kidney and consolidating astringency: Assists in improving frequent urination and fatigue caused by kidney deficiency, gently nourishing without burden.
（4）Boosting immunity: The synergy of polysaccharides and saponins enhances resistance and combats fatigue.
（5）Metabolic management: Low GI, high dietary fiber, assisting in blood sugar and fat control, and providing meal replacement for weight loss。
Vi. Ways of Consumption (Diverse and Convenient）
（1）Direct preparation for drinking: Add 5-10g of powder to 200ml of warm water, stir and drink immediately. It nourishes the stomach in the morning and helps with sleep before going to bed.
（2）Meal replacement combination: Add milk/soy milk/oats to make a nutritious breakfast or afternoon tea.
（3）Baking and cooking: Add flour to make steamed buns, bread and pastries to enhance nutrition and flavor.
（4）Complementary food additions: Infant rice porridge, liquid food for the elderly, mild and easily absorbed.
Vii. Applicable Population
（1）Those with weak spleen and stomach, indigestion and prone to diarrhea;
（2）Those who stay up late to work overtime, are fatigued and weak, or have a relatively low immunity;
（3）People with dry cough due to lung dryness and those seeking health preservation in autumn and winter;
（4）People who are controlling sugar and fat and seeking meal replacement for weight loss;
（5）Infants and young children, the elderly, and those recovering from surgery。
Freeze-dried yam powder is a healthy food ingredient that is both medicinal and edible, featuring low temperature preservation, high nutrition, easy absorption, and no additives. It fully retains the active ingredients and natural flavor of the iron rod yam, and has the functions of strengthening the spleen and stomach, moistening the lungs and kidneys, and enhancing immunity. It is convenient to consume and can be used in various scenarios, making it suitable for daily health preservation and nutritional supplementation of all age groups。
Contact:Judy Guo
WhatsApp/we chat :+86-18292852819
E-mail:sales3@xarainbow.com
Post time: Jun-24-2026