I found this information on the website
http://www.herbafood.de/eherbacel.htm
HERBACEL Classic AF
(Apple fibre)
Apple fibre is made of juice extracted and carefully dried apples from selected growing areas. It has a characteristically pleasant apple flavour. The total fibre content according to the AOAC method is approx. 60%, of which 46% are in the form of insoluble dietary fibres and 14% as soluble dietary fibres, mainly pectin.
Digestible carbohydrates are present in the form of the natural sugars found in apples, particularly fructose. There is also a relatively large proportion of potassium and calcium.
Apple fibre is available in various particle sizes. The balanced fibre spectrum and pleasant organoleptic characteristics make it extremely useful. Applications include bread and baked goods, e.g. short crust pastry and gingerbread, cereal and fruit bars and fruit preparations
I hope this helps