Bok choy of the Daily Value, DV) of vitamin A (30% DV), vitamin C (54% DV) and vitamin K (44% DV), while providing folate, vitamin B6 and calcium in moderate amounts (10–17% DV) (table). Chinese cabbage was ranked #2 for nutrient density out of 41 nutrient-rich plant foods. Bok choy contains glucosinolates. These compounds have been reported to prevent cancer in small doses, but, like many substances, can be toxic to humans in large doses, particularly to people who are already seriously ill. In 2009, an elderly diabetic woman who had been consuming 1 to 1.5 kg of raw bok choy per
Bok Tower Gardens includes her personal communications, photographs, manuscript writings, and family possessions. The American Foundation Collection includes newspaper scrapbooks, meeting minutes, publications, and other manuscript materials. The Edward Bok Newspaper Scrapbook Collection is made up of 42 bound scrapbooks filled with newspaper clippings about Bok's publications and charitable acts. Access to the collections in the Chao Research Center Archives is available by appointment only. To make an appointment the Bok Tower Librarian should be contacted. The Pinewood Estate Mansion holds furniture, ceramics and other objects that were kept in the house before Bok Tower purchased it in 1970. Other collections held at