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That is the central contested question in nutrition science right now, and NUTRITION 2026 is putting it directly into conflict

Therefore, DON treatment can not only reduce the self-renewal potential and metastatic ability of pancreatic ductal adenocarcinoma (PDAC) tumor cells but also lead to extensive remodeling of the tumor extracellular matrix (ECM), promoting the infiltration and activation of CD8 + T cells (Sharma et al., 2020)

Looks exactly how it should.

Ultrasound can measure dermal thickness and collagen density without a biopsy, making it one of the more reliable "before and after" tools in dermatology