From blossom to bottle: A natural alternative to sulfites

In this Sustainable Wine Roundtable Member Interview podcast, I’m joined by Filipe Carvalho, head of business development at Tree Flower Solutions (TFS), a Portuguese biotech startup that develops natural preservatives for the agri-food industry. We discuss Chestwine, TFS’s innovative sulfite alternative made from chestnut male flower tannins. Filipe addresses common misconceptions about sulfites, explains why natural alternatives matter, and shares insights into the unique properties and R&D process behind Chestwine.

You can listen to From blossom to bottle: A natural alternative to sulfites online on Radio and Podcast. Open the player on this page to stream the available audio.

From blossom to bottle: A natural alternative to sulfites is an episode from Sustainable Wine by Sustainable Wine.

This episode is 25:24 long.

This episode was published on Apr 8, 2026.

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