Cholesterol Oxides in Swedish Foods and Food Ingredients: Milk Powder Products

Cream‐, whole milk‐and skim milk powders had 1.6, 2.0, and 18.9 mg cholesterol/g fat, respectively. About 90% of the cholesterol was unesterified. Analyses of fresh spray‐dried whole‐and skim milk powders from “low and medium heat” conditions and fresh roller‐dried whole milk powder from “low heat” conditions contained less than 0.1 ppm cholesterol oxides in lipids. However, spray‐dried whole‐and skim milk powders from “high heat” conditions had substantial levels of some important cholesterol oxides. Skim‐milk powders, stored in big sacks for 11–37 months and small consumer packages for 2–23 months, contained variable amounts of 5, 6α‐epoxy‐5β‐cholestan‐3β‐ol (0.3–4.0 ppm), 5,6β‐epoxy‐5α‐cholestan‐3β‐ol(0.7–10.40ppm), cholest‐5‐ene‐3β,7α‐diol(0.5–16.2 ppm), cholest‐5‐ene‐3β,7β‐diol(1.3–20.8 ppm), cholest‐5‐ene‐3β,20α‐diol(0.6–2.7 ppm), cholest‐5‐ene‐3,25‐diol(0.3–0.8 ppm), 5α‐cholestane‐3β,5,6β‐triol(1.3–2.5 ppm) and 3‐hydroxy‐cholest‐5‐en‐7one(1.8‐24.9 ppm).