Study Links High Sugary Drink Intake to Increased Hair Loss Risk - Video

A recent systematic review published in the journal Nutrition and Health analyzed 17 studies involving over 61,000 participants to explore the effects of diet on hair health. The review, led by nutrition researchers, aimed to understand how specific nutrients and foods influence hair loss and overall hair quality.

Researchers examined the role of various dietary factors, focusing on vitamin D, sugary drinks, protein, iron, and certain plant extracts. They found that lower vitamin D levels were strongly linked to more severe hair loss, although one large study reported no connection. High consumption of sugary drinks—more than 3.5 liters per week—was associated with increased hair loss, particularly in men.

The review also highlighted that diets rich in protein, iron, cruciferous vegetables, and soy showed potential benefits for maintaining hair thickness and reducing hair loss, though not all findings were statistically significant. Supplements like green tea extracts and persimmon leaf extract were linked to improved hair density and reduced shedding in some clinical trials, but these studies often had a high risk of bias.

Some studies pointed out risks tied to excessive vitamin A (retinol) intake and alcohol consumption, which could worsen hair loss or affect hair pigmentation. One early trial found that low protein intake quickly thinned and depigmented hair in men.

The researchers emphasized the importance of adequate nutrition for healthy hair and suggested that focusing on specific nutrients may be more beneficial than broad dietary patterns. They also warned that the evidence is preliminary and that more high-quality research is needed to confirm these associations.

Overall, this review encourages people to maintain balanced vitamin D and iron levels and to avoid excessive sugary drinks and alcohol to support hair health.

Reference: Gomes, N., Silva, N., & Teixeira, B. (2025). Assessing the relationship between dietary factors and hair health: A systematic review. Nutrition and Health. DOI – 10.1177/02601060251367206, https://journals.sagepub.com/doi/10.1177/02601060251367206