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Sources The New York Times, July 23, 2026 Disclaimer: Statistical data in medical articles provide general trends and do not pertain to individuals

The peptide activates various immune pathways, and in some individuals, this activation may produce symptoms similar to fighting off an infection

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Specifications Other Known Titles: Forkhead box protein O4, Proxofim, FOXO4a, AFX, AFX1, MLLT7 Sequence: H-D-Leu-D-Thr-D-Leu-D-Arg-D-Lys-D-Glu-D-Pro-D-Ala-D-Ser-D-Glu-D-Ile-D-Ala-D-Gln-D-Ser-D-Ile-D-Leu-D-Glu-D-Ala-D-Tyr-D-Ser-D-Gln-D-Asn-D-Gly-D-Trp-D-Ala-D-Asn-D-Arg-D-Arg-D-Ser-D-Gly-D-Gly-D-Lys-D-Arg-D-Pro-D-Pro-D-Pro-D-Arg-D-Arg-D-Arg-D-Gln-D-Arg-D-Arg-D-Lys-D-Lys-D-Arg-D-Gly-OH Molecular Formula: C 228 H 388 N 86 O 64 Molecular Weight: 5358.05 g/mol FOXO4-DRI Research DRI peptides are synthetic variants of their natural counterparts

This indicates the importance of the p53 TAD2 region in FOXO4 FHD binding