... It has been shown by Dao and Friedman (1992) that peeling influences the contents of health-promoting compounds; they showed that potato peels contain high levels of phenolics, making them ... includes four tocopherols (α, β, γ, and δ) and four tocotrienols (α, β, γ, and δ), among which α -tocopherol has the highest biological activity in humans. In potatoes, α-tocopherol is the predominant ... in Table 8. When recalculated to the DW of potatoes, the amounts ranged between 0.8 and 34.8 µg/g DW. OCH3OHCH3CH3OCH3OHCH3CH3 Fig. 4. Chemical structures of the vitamin E...