Zinc status of vegetarians

Area of Science:

• Nutritional Science
• Human Physiology

Background:

• Dietary patterns significantly influence nutrient status.
• Vegetarian diets, while offering health benefits, may present challenges in meeting certain micronutrient requirements, such as zinc.
• High fiber intake in vegetarian diets may affect mineral absorption.

Purpose of the Study:

• To investigate the zinc status of vegetarians compared to non-vegetarians.
• To explore the relationship between dietary habits, particularly fiber intake, and zinc levels in different biological samples.

Main Methods:

• Collected 24-hour dietary recalls from 79 vegetarians and 41 non-vegetarians.
• Analyzed zinc content in blood, hair, and saliva samples.
• Compared nutrient intake and zinc levels between vegetarian and non-vegetarian groups.

Main Results:

• Vegetarians had lower intakes of energy, protein, fat, calcium, and zinc, but higher intakes of fiber, potassium, vitamin A, and ascorbic acid.
• Salivary zinc levels were significantly lower in vegetarians, inversely proportional to dietary fiber.
• Hair zinc levels were significantly lower in vegetarians, while serum zinc levels were also lower but not significantly.

Conclusions:

• Increased dietary fiber in vegetarian diets may contribute to reduced zinc status.
• Vegetarians, particularly women, may have suboptimal zinc status due to dietary composition and potential absorption interference.
• Further research is warranted to optimize zinc intake and absorption in vegetarian populations.