dietologically

adverb

In a manner pertaining to, derived from, or justified by dietology (the study of nutrition and nutritional regimes);  in the ways substantiated or approved by the scientific knowledge of healthy eating and drinking.

Examples: 

Optimised pan pre-coating (the above-described scorch-based priming) will always reduce oil consumption considerably to dietologically acceptable health-keeping amounts.  (Source: J∙ Okram - Bartonian Potato Pancakes  ●  Cooking Recipe.)