Microcapsule consisting in or containing: • a core consisting in or comprising an oxidizable active, said core being optionally surrounded by a precoating consisting in or comprising an antioxidant compound X, said core, optionally surrounded by a precoating consisting in or comprising said antioxidant compound X, being optionally surrounded by a coating consisting in or comprising a water insoluble compound, • a first layer surrounding the core by either: - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1), or - means for inducing water insolubility of said encapsulating agent (MII 1), • a second layer surrounding the first layer by: - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1) when the first layer is means for inducing water insolubility of said encapsulating agent, - means for inducing water insolubility of a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (MII 1) when the first layer is said encapsulating agent, the first or the second layer from the core optionally comprising further an antioxidant compound Y, and • an alternation of n layers of water soluble or organic solvent, in particular ethanol, soluble encapsulating agents (EA 2) and of m layers of means for inducing water insolubility of said encapsulating agents (MII 2), surrounding the second layer, starting with a layer of the same nature as the nature of the first one, m being equal to 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, n = m, when the first layer is said EA 1, or n = m - 1, when the first layer is said MII 1, the last layer being MII 2, each EA 2 being preceded and/or followed by means for inducing water insolubility (MII 2) of said EA2, with the proviso that: when the first layer is MII 1 and the second layer is EA 1, and when m is equal to 1, then MII 2 are means to induce water insolubility of EA 1. • a core consisting in or comprising an oxidizable active, said core being optionally surrounded by a precoating consisting in or comprising an antioxidant compound X, said core, optionally surrounded by a precoating consisting in or comprising said antioxidant compound X, being optionally surrounded by a coating consisting in or comprising a water insoluble compound, • a first layer surrounding the core by either: - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1), or - means for inducing water insolubility of said encapsulating agent (MII 1), - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1), or - means for inducing water insolubility of said encapsulating agent (MII 1), • a second layer surrounding the first layer by: - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1) when the first layer is means for inducing water insolubility of said encapsulating agent, - means for inducing water insolubility of a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (MII 1) when the first layer is said encapsulating agent, the first or the second layer from the core optionally comprising further an antioxidant compound Y, and - a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (EA 1) when the first layer is means for inducing water insolubility of said encapsulating agent, - means for inducing water insolubility of a water soluble or organic solvent, in particular ethanol, soluble encapsulating agent (MII 1) when the first layer is said encapsulating agent, • an alternation of n layers of water soluble or organic solvent, in particular ethanol, soluble encapsulating agents (EA 2) and of m layers of means for inducing water insolubility of said encapsulating agents (MII 2), surrounding the second layer, starting with a layer of the same nature as the nature of the first one, m being equal to 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, n = m, when the first layer is said EA 1, or n = m - 1, when the first layer is said MII 1, the last layer being MII 2, each EA 2 being preceded and/or followed by means for inducing water insolubility (MII 2) of said EA2, with the proviso that: when the first layer is MII 1 and the second layer is EA 1, and when m is equal to 1, then MII 2 are means to induce water insolubility of EA 1. when the first layer is MII 1 and the second layer is EA 1, and when m is equal to 1, then MII 2 are means to induce water insolubility of EA 1.