Vitamin and Mineral Absorption: Digestion Not Always Required

Absorption of vitamins and minerals does not always require full digestion:

• Direct absorption: Vitamin C, magnesium, and some minerals can be absorbed directly in the stomach/small intestine.
• Require digestion: Vitamins A and D need breakdown (e.g., from retinyl esters or provitamins) to become absorbable.

Fat-Soluble vs. Water-Soluble

• Fat-soluble (A, D, E, K): Require dietary fat for absorption. Low-fat diets can impair uptake.
• Water-soluble (C, B-complex): Absorbed without fat.

Digestion Overview

Digestion begins in the mouth (salivary amylase), continues in the stomach (gastric juices), and completes in the small intestine (pancreatic enzymes, bile). This breaks large molecules into absorbable units.

A balanced, varied diet typically meets micronutrient needs. Consult a doctor if you suspect deficiencies.