Exhibit 23.1

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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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We consent to the inclusion in this Registration Statement on Form S-1 of our report dated December 17, 2024, with respect to the financial statements of Applied DNA Sciences, Inc. included in this Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

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/s/ Marcum LLP

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Melville, NY

October 29, 2025