Bone nutrients for vegetarians

Area of Science:

• Nutrition Science
• Bone Biology
• Dietary Studies

Background:

• Bone health is influenced by diet, with dairy products often highlighted for calcium and vitamin D.
• Plant-based diets offer essential nutrients for bone maintenance but may contain inhibitors of calcium absorption.
• Concerns exist regarding vegetarian and vegan diets' impact on bone mineral density (BMD).

Purpose of the Study:

• To evaluate the impact of plant-based diets on bone health.
• To identify key nutrients and dietary factors influencing bone mineral density in vegetarian and vegan diets.
• To assess the clinical significance of BMD differences and fracture risk in individuals on plant-based diets.

Main Methods:

• Literature review of studies examining vegetarian/vegan diets and bone health markers.
• Analysis of nutrient content in plant-based diets, including calcium, vitamin D, protein, and phytates.
• Assessment of research on factors affecting calcium absorption and bone mineral density.

Main Results:

• Some studies indicate lower BMD in vegan diets, but this is not clinically significant.
• Adequate calcium intake in vegan diets mitigates fracture risk.
• Plant-based diets contain beneficial nutrients (calcium, vitamin D, protein, potassium, soy isoflavones) but also inhibitors (oxalic/phytic acids).
• Vitamin B-12 status is crucial for maintaining BMD.

Conclusions:

• Plant-based diets can provide adequate nutrients for bone health when planned carefully.
• Recommendations include meeting Dietary Reference Intakes for calcium and protein for vegetarians and vegans.
• Fortified foods can aid in achieving recommended calcium and vitamin D intake.