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Can something in a patient’s tears tip you off as to whether they have diabetic peripheral neuropathy? According to an Australian research team, the answer is yes. The same investigators previously linked risk of diabetic corneal neuropathy to low levels of substance P—a neuropeptide found in tears that can be gathered non-invasively. Now, their new study, published in The Ocular Surface, shows that substance P can also be a biomarker for diabetic peripheral neuropathy. Read More