Freeze-dried purple sweet potato granules are natural purple sweet potato products made by vacuum freeze-drying (FD) technology. They are free of additives, retain high nutrients and have strong rehydration properties, making them a popular choice for healthy snacks and food ingredients.
I. Basic Overview
（1）Ingredients: Fresh and high-quality purple sweet potatoes (the ingredient list only includes “purple sweet potatoes”, free of sucrose, oil and preservatives).
（2）Appearance: Irregular particles ranging from deep purple to dark purple (commonly 5-10mm cubes/rectangular prisms), with a loose and porous structure, no adhesion, no impurities, and a natural sweet potato aroma.
（3）Taste: Crispy and dry when eaten dry. Rehydrate in 3 minutes when exposed to water or milk to restore the smooth and dense texture of fresh potatoes.
（4）Moisture content: ≤5%, easy to store, long shelf life (can be stored for 1-3 years in vacuum/nitrogen-filled packaging).
Ii. Core Process (FD Freeze-drying）
The entire process is carried out at low temperatures (-35℃ to -50 ℃) and vacuum, without high temperatures or oil frying, maximizing freshness and nutrition retention.
（1）Selection and cleaning of ingredients: Select purple sweet potatoes with fine flesh and high sweetness, and wash and peel them.
（2）Diced for color protection: Cut into uniform particles, with citric acid/ascorbic acid for color protection and oxidation prevention.
（3）Pre-freezing: Quick freezing at -25℃ to -40 ℃ to form tiny ice crystals, protecting the cell structure.
（4）Vacuum sublimation: In a vacuum chamber (20-50 Pa), ice crystals directly sublimate, dehydrating by over 90%.
（5）Analysis and drying: Remove bound water at 40-60℃, moisture content ≤5%.
（6）Sorting and packaging: Clean workshop sorting, aluminum foil bags/nitrogen-filled sealed, light-proof and moisture-proof
Iii. Nutritional Value (Far Exceeding Ordinary drying/frying
1：Core nutrients (per 100g)
（1）Anthocyanin: 10-24 mg (freeze-dried retention rate over 90%, dried only 50%).
（2）Dietary fiber: ≥ 4.5g (promoting intestinal health).
（3）Vitamin C: ≥12 mg (high retention rate).
（4）Potassium: ≥350 mg (potassium supplementation for blood pressure control).
（5）Selenium: ≥ 0.014mg (antioxidant, enhancing immunity).
2. Freeze-drying vs. traditional processing
（1）Anthocyanin: Freeze-dried 24.6mg > heat pump 11.7mg > hot air 9.9mg.
（2）Vitamin C: Freeze-drying leads to a loss of less than 10%, while drying/frying results in a loss of 30% to 40%.
（3）Cell structure: Freeze-dried intact and porous, with good rehydration and easy digestion. The drying process is dense and the texture is hard.
Iv. Main Features and Advantages
（1）Nutrient-intensive: Low-temperature vacuum locking in freshness, high retention rate of active ingredients, natural and healthy.
（2）Unique taste: Crispy when eaten dry, soft and dense when rehydrated, no additives for greater peace of mind.
（3）Portable and long-lasting: Lightweight and easy to carry, it can be stored at room temperature for 1 to 3 years without refrigeration.
（4）Safe and pure: Zero additives, certified by ISO22000 and HACCP, with strict microbial indicators.
（5）Wide application: direct snacks, baking ingredients, yogurt/cereal companions, complementary food additives, dessert decorations
V. Purchase and Consumption Suggestions
1. Key points for selection
（1）Check the process: Make sure to choose FD vacuum freeze-drying, not VF low-temperature oil bath (frying).
（2）Check the ingredients: Only purple sweet potatoes, no additives.
（3）Observe the appearance: uniform particles, deep purple with luster, no whitening or charred, and no peculiar smell
2. Method of consumption
（1）Eat directly: Ready to eat upon opening the bag, crispy and sweet, an ideal snack for fitness and office use.
（2）Rehydrated consumption: Soak in warm water or milk for 3 minutes to restore the texture of steamed purple sweet potatoes. It is an excellent choice for meal replacement or complementary food.
（3）Pairing: Mix with yogurt, cereal, salad; Baking bread, cakes and biscuits; It enhances the aroma and color when cooking porridge or soup.
Vi. Target Audience
（1）Healthy snack enthusiast: Low in calories and high in fiber, no additives, an alternative to fried/candy.
（2）Fitness and fat loss enthusiasts: High satiety, low GI, potassium supplement, and friendly for weight control.
（3）For mothers and infants: Natural and pure, easy to digest, safe and nutritious for baby complementary foods and pregnant women’s snacks.
Baking/food industry practitioners: Natural pigments + flavor ingredients to enhance the appearance and nutrition of products
Freeze-dried purple sweet potato granules are a healthy product combining FD black technology and natural ingredients. They are highly nutritious, have a good taste, are widely used, and are safer. They are an excellent choice for healthy snacks and functional ingredients in modern life.
Contact:Judy Guo
WhatsApp/we chat :+86-18292852819
E-mail:sales3@xarainbow.com
Post time: Jun-24-2026