Excess vitamin intake: An unrecognized risk factor for obesity

Area of Science:

• Nutrition Science
• Public Health
• Metabolic Research

Background:

• Widespread food fortification and infant formula supplementation have dramatically increased vitamin intake across all age groups.
• A concurrent rise in obesity and related diseases, with notable global and demographic disparities, has been observed.
• Established knowledge indicates B vitamins, even at non-toxic doses, can significantly promote body fat accumulation.

Purpose of the Study:

• To explore the causal link between elevated vitamin intake and the increasing prevalence of obesity.
• To examine the non-monotonic dose-response relationship between excess vitamin consumption and weight/fat gain.
• To investigate the contribution of vitamin fortification to obesity disparities.

Main Methods:

• Review of existing literature on vitamin intake trends, fortification practices, and obesity epidemiology.
• Analysis of studies investigating the effects of high-dose vitamins on body weight and fat mass, particularly in infants.
• Examination of ecological data correlating B vitamin consumption with obesity and diabetes prevalence.

Main Results:

• Infant formulas with high vitamin levels are associated with increased infant weight and fat mass gain.
• Ecological studies reveal a strong correlation between higher B vitamin consumption and increased rates of obesity and diabetes.
• Evidence suggests a potential non-monotonic dose-response effect of vitamins on fat gain.

Conclusions:

• Excessive vitamin intake, driven by fortification and supplementation, is hypothesized to be a causal factor in the obesity epidemic.
• Vitamin fortification may exacerbate obesity disparities among different populations and countries.
• Further research is warranted to elucidate the precise mechanisms and public health implications.