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The macronutrient recommendations provided in the Nutritics option are adopted from International Sports Nutrition guidelines, including the American College of Sports Medicine and American Dietetics Associations position stand on Nutrition and Athletic Performance, ISSN and Australian Institute of Sport:
These are provided as guidelines only; exact requirements will vary from person to person depending on factors such as training intensity, training duration, available recovery time, and fitness status.
The guidelines for pregnancy come from the UK Scientific Advisory Committee on Nutrition (SACN) and the National Health and Medical Research Council (NHMRC) in Australia.