Table 2.

Nutrient intake in children with ASD.

Nutrient	Intake	Subjects	Source
Protein Other Macronutrients, Vitamin A Vitamin B1, B2, B3, B6 Folic Acid Vitamin B12 Calcium Iron Zinc Selenium	Lower in ASD No difference Lower in ASD Lower in ASD Lower in ASD Lower in ASD Lower in ASD Lower in ASD Lower in ASD Higher in ASD	86 children with ASD aged 2–8 years and 57 age-matched peers without ASD	Barnhill et al. [41]
Energy Fats Potassium Copper Folate Iron Vitamin C	No difference No difference Lower in ASD Lower in ASD Lower in ASD Lower in ASD Lower in ASD	63 ASD children in the age range of 4 to 10 years and 50 typically developing children matched on age and socio-economic status to the ASD children	Malhi et al. [30]
Protein Calcium Iron Zinc Vitamin B2	Adequate (RDA) Lower than RDA Lower than RDA Lower than RDA Lower than RDA	53 children with ASD (45 boys and 8 girls) in the age group of 2–13 years	Siddiqi et al. [42]
Fiber Calcium Vitamin E Vitamin A Vitamin C Folic Acid Zinc	Lower than DRI Lower than DRI Lower than DRI Lower than DRI Lower than DRI Lower than DRI Lower than DRI	70 children with ASD and severe food selectivity	Sharp et al. [29]
Folate Zinc Vitamin B12 Vitamin D	Lower in ASD Lower in ASD Lower in ASD Lower in ASD	738 ASD children and 302 typically developing children (TD) age 2–6	Zhu et al. [43]
Vitamin E Vitamin K Vitamin B2 Vitamin B6 Vitamin A Vitamin D Vitamin B12 Folate Magnesium Phosphorus Zinc Selenium	Lower in ASD Lower in ASD Lower in ASD Lower in ASD Lower than DRI in ASD & TD Lower than DRI in ASD & TD Lower than DRI in ASD &TD Lower than DRI in ASD & TD Lower than DRI in ASD & TD Lower than DRI in ASD & TD Lower than DRI in ASD & TD Lower than DRI in ASD &TD	52 ASD cases (37 boys and 15 girls), 51 TD children (26 boys and 25 girls) aged 3–6	Alkhalidy et al. [44]

RDA—Recommended Dietary Allowance; DRI—Dietary Reference Intake.