+An [Endergonic reaction](/wiki/Endergonic_reaction) is a chemical process demanding an input of [Energy](/wiki/Energy) to occur. It builds complexity, storing potential, with its products holding more [Free energy](/wiki/Free_energy) than the initial reactants.
+## See also
+- [Exergonic reaction](/wiki/Exergonic_reaction)
+- [Gibbs free energy](/wiki/Gibbs_free_energy)
+- [Activation energy](/wiki/Activation_energy)
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