Vitamin D + Calcium: How Does Vitamin D Affect Calcium Absorption?
Nutrient Synergy
Without vitamin D you absorb 10–15% of dietary calcium; with enough, 30–40%. But a one-year trial found that pushing levels higher raised…
Atlas section
Nutrient Synergy
One nutrient supporting the activity, transport or conversion of another
Latest in this section
Fat + Fat-Soluble Vitamins: Does Eating Fat Really Improve Vitamin Absorption?
Dietary fat genuinely improves absorption of vitamins A, D, E and K. But the relationship isn't linear — once a meal contains enough fat for digestion to work, adding more does very little.
Explore the interaction