English to Italian Medical Medical (general) diet and supplementation

Contesto:
"The amount of vitamin D in foods as recommended by the Food Guide is not enough to meet the Adequate Intakes necessary for people over the age of 50 to help reduce the risk of bone fractures."
Definizione trovata on-line:
"Adequate Intake (AI)
Of a nutrient, the amount that appears to sustain good health. The Food and Nutrition Board uses Adequate Intake for nutrients that have not yet received enough scientific study to merit setting of an official Recommended Dietary Allowance (RDA)."
Esiste un equivalente 'ufficiale' in italiano? Non si tratta delle Dosi Raccomandate, vero? Mi pare che ci sia una differenza, secondo questa definizione...
Grazie!