How Chili Seeds And Skins Affect The Texture And Heat of Chili Sauce Most people think chili seeds are the hottest part of the pepper. The truth is more interesting: the fire lives mainly in the white pith (placenta) that holds the seeds, while the seeds themselves are mostly fiber. Still, both seeds and skins play a big role in how a chili sauce feels and how hot it is. Here is what happens when manufacturers decide to keep or remove them. Where the heat really is. Capsaicin is concentrated in the pale, fleshy placenta inside the pepper, not in the seeds. Seeds pick up some capsaicin because they sit next to the placenta, but they contain little of their own. Removing the placenta drops most of the heat; removing the seeds alone makes a smaller difference. Skins: texture, color and body. Chili skins are tough and fibrous.
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