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However, the current lack of stable and well\u2010performing edible semiconductors needs to be addressed to reach technological maturity and allow the surge of a new generation of edible circuits. In the quest for good\u2010performing edible semiconductors, this study has explored the possibility of considering materials that are not regulated for intentional ingestion, yet are daily swallowed with no adverse reactions, such as pigments contained in toothpaste. This work first elaborates on the basis of inadvertent ingestion data to estimate the quantity of daily ingested Copper(II) Phthalocyanine (CuPc), a whitening pigment and well\u2010known organic semiconductor. Subsequently, CuPc is employed in the first demonstration of fully edible electrolyte\u2010gated transistors operating at low voltage (&lt;1\u00a0V), displaying good reproducibility and stable performance for over a year. 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