Churn definition, a container or machine in which cream or milk is agitated to make butter. See more.
Vitamin C is sometimes added by fortification, because content is variable, and much of that is lost in processing. Vitamin C also helps to prevent oxidation of the product. Other vitamin concentrations are low, but apple juice does contain various mineral nutrients, including boron, which may promote healthy bones.
I take two scoops with my orange or apple juice, because it needs Vitamin C to get absorbed. Sometimes I mix it with Effer-C, Effervescent Drink Mix, Elderberry from Now Foods, so I don't taste the collagen. Both brands that carry Collagen (Neocell and Doctor's Best) are very good quality.