Fat-Soluble Vitamin Absorption

The 30–50% absorption increase from co-ingesting fat represents a substantial difference in how much vitamin D enters circulation. Any impairment to fat digestion or absorption will reduce the uptake of fat-soluble vitamins such as vitamin A. When the pancreas fails to produce sufficient lipase due to dietary stress, it cannot properly digest fat-soluble vitamins. The gallbladder's release of bile is critical for fat digestion, and its removal compromises fat-soluble vitamin absorption. Prolonged consumption of refined foods and excess sugar can impair pancreatic lipase production. Any dietary fat — including avocado, olive oil, MCT oil, nuts, dairy, eggs, and meat — provides the absorption benefit for fat-soluble supplements.