The main ingredient of Blueberry jam is frozen blueberries, sugar. Blueberry anthocyanins can promote the retina rhodopsin regenerated cells, can prevent severe myopia and retinal detachment, and can improve vision.
The production process of blueberry jams:

1. Fresh blueberries cleaned after drain backup

2. White sugar and water 2: 1, a small fire boiled syrup spare

3. Pour the blueberry boiled syrup, boil a small fire, stirring, until blueberries exploding flesh separated into a sticky paste

4. Pour the lemon juice to blueberries, make Stir

5. After cooling to filter out the blueberry skins, you can not filter, a sealed tank, into the refrigerator to

Jam making process by adding lemon juice, one can add some sweet and sour taste, can play the role of main natural preservative, lemon also has a strong antioxidant, can play the role of extended shelf life. GELGOOG offers blueberry jam making machine