depending upon the form, heme or nonheme是整句的状语吗

With respect to its absorption, the major determinants are the sources of iron contained within foods consumed depending upon the form, heme or nonheme.

depending upon the form, heme or nonheme.是整句的状语吗？

depending upon the form, heme or nonheme

目前分词短语作状语，需要考虑其逻辑主语。本句中depending的逻辑主语应该是整个句子内容，即这个分词短语等于which 引导的非限制性定语从句，which的先行词为主句内容。这种分词短语作补充性状语，其前应该有逗号。