Granny Smith apples are a crisp, tart delicious apple. They contain more malic acid, which is responsible for their distinctive “sour” taste than any other apple. I think the Granny Smith’s are the best tasting apple to juice with. The tart flavor adds a wonderful dimension to juices, there’s also a slight hint of sweetness in them that’s perfect for green juices.

Granny Smith apples is a key ingredient in the Gerson Therapy because the acid is super beneficial, as it stimulates the metabolism and helps to detox heavy metals. Katheryn Alexander, a Gerson practitioner in Australia, also explains how tart apples enhance the other ingredients in the juices:

“Sour apples are higher in potassium malate and higher in pectin (good for chelating heavy metals), they can also extract higher amounts of nutrients from the pulped vegetables due to their higher acidity, so you end up with a more nutrient-rich juice.”

Granny Smith apples are also delicious in apple pies. They add an amazing tart and sweetish taste when combined with other sweet apples.

Resource:
Gerson Therapy
Vegan Apple Pie