Assess Macronutrient Intakes and Diet Quality for Contemporary Consumer Diets

Diet Quality Implications

At IAFNS, we advance food safety through rigorous research, collaboration, and science-based guidance.

Understanding Restrictive Diets

A wide range of self-selected contemporary diets restrict or eliminate specific foods or food groups (e.g., gluten free). Health professionals advising consumers may be unaware of the relationship between specific diets and nutrient insufficiency as well as low diet quality overall. Restriction diets may be inadvertently putting consumers at risk for low quality diets or even specific nutrient inadequacies. This research will examine diet quality and nutrient insufficiencies.

The Carbohydrates Committee addresses scientific issues through discovery, research tool development, and translational messaging on how carbohydrates in foods are associated with consumption, diet quality and health. See recent publications and upcoming events to learn more about the committee’s work.

Join Us>

Investigators

Zach Conrad, PhD
William & Mary

Publications

Are People Consuming the Diets They Say They Are? Self-Reported vs Estimated Adherence to Low-Carbohydrate and Low-Fat Diets: National Health and Nutrition Examination Survey, 2007-2018

This study examined participants’ self-reported adherence to low-carbohydrate and low-fat diets compared with their estimated adherence using up to two 24-hour recalls.

Read more about Are People Consuming the Diets They Say They Are? Self-Reported vs Estimated Adherence to Low-Carbohydrate and Low-Fat Diets: National Health and Nutrition Examination Survey, 2007-2018

Micronutrient Inadequacy Differs by Intake of Fat Amount and Class Among Adults That Consume a Restricted Carbohydrate Diet: National Health and Nutrition Examination Survey, 2007-2018

Restricted carbohydrate diets remain among the most popular for weight loss and general health improvement. However, recent evidence demonstrates that carbohydrate restricted diets are low in overall diet quality.

Read more about Micronutrient Inadequacy Differs by Intake of Fat Amount and Class Among Adults That Consume a Restricted Carbohydrate Diet: National Health and Nutrition Examination Survey, 2007-2018

Fat Intake Modifies the Association between Restricted Carbohydrate Diets and Prevalent Cardiometabolic Diseases among Adults in the United States: National Health and Nutrition Examination Survey, 1999–2018

This study evaluates cross-sectional relationships between carbohydrate restricted diets and cardiometabolic diseases in adult Americans, specifically comparing how amount and type of fat affects the relationship. Diets with carbohydrate intake below recommended amounts were associated with prevalence of cardiometabolic disease.

Read more about Fat Intake Modifies the Association between Restricted Carbohydrate Diets and Prevalent Cardiometabolic Diseases among Adults in the United States: National Health and Nutrition Examination Survey, 1999–2018

WP_Query Object
(
    [query] => Array
        (
            [post_type] => publication
            [posts_per_page] => 5
            [type] => 
            [area] => 
            [committee] => Assess Macronutrient
            [authors] => 
            [showtitle] => false
            [meta_query] => Array
                (
                    [relation] => AND
                    [0] => Array
                        (
                            [key] => _ilsi_date
                            [value] => 2021-01-17
                            [compare] => >=
                            [type] => DATE
                        )

                )

            [maxyears] => 5
            [tax_query] => Array
                (
                    [0] => Array
                        (
                            [taxonomy] => ilsi_committee
                            [field] => name
                            [terms] => Assess Macronutrient
                        )

                )

            [paged] => 1
            [meta_key] => _ilsi_date
            [orderby] => meta_value
            [order] => DESC
        )

    [query_vars] => Array
        (
            [post_type] => publication
            [posts_per_page] => 5
            [type] => 
            [area] => 
            [committee] => Assess Macronutrient
            [authors] => 
            [showtitle] => false
            [meta_query] => Array
                (
                    [relation] => AND
                    [0] => Array
                        (
                            [key] => _ilsi_date
                            [value] => 2021-01-17
                            [compare] => >=
                            [type] => DATE
                        )

                )

            [maxyears] => 5
            [tax_query] => Array
                (
                    [0] => Array
                        (
                            [taxonomy] => ilsi_committee
                            [field] => name
                            [terms] => Assess Macronutrient
                        )

                )

            [paged] => 1
            [meta_key] => _ilsi_date
            [orderby] => meta_value
            [order] => DESC
            [error] => 
            [m] => 
            [p] => 0
            [post_parent] => 
            [subpost] => 
            [subpost_id] => 
            [attachment] => 
            [attachment_id] => 0
            [name] => 
            [pagename] => 
            [page_id] => 0
            [second] => 
            [minute] => 
            [hour] => 
            [day] => 0
            [monthnum] => 0
            [year] => 0
            [w] => 0
            [category_name] => 
            [tag] => 
            [cat] => 
            [tag_id] => 
            [author] => 
            [author_name] => 
            [feed] => 
            [tb] => 
            [meta_value] => 
            [preview] => 
            [s] => 
            [sentence] => 
            [title] => 
            [fields] => all
            [menu_order] => 
             => 
            [category__in] => Array
                (
                )

            [category__not_in] => Array
                (
                )

            [category__and] => Array
                (
                )

            [post__in] => Array
                (
                )

            [post__not_in] => Array
                (
                )

            [post_name__in] => Array
                (
                )

            [tag__in] => Array
                (
                )

            [tag__not_in] => Array
                (
                )

            [tag__and] => Array
                (
                )

            [tag_slug__in] => Array
                (
                )

            [tag_slug__and] => Array
                (
                )

            [post_parent__in] => Array
                (
                )

            [post_parent__not_in] => Array
                (
                )

            [author__in] => Array
                (
                )

            [author__not_in] => Array
                (
                )

            [search_columns] => Array
                (
                )

            [ignore_sticky_posts] => 
            [suppress_filters] => 
            [cache_results] => 1
            [update_post_term_cache] => 1
            [update_menu_item_cache] => 
            [lazy_load_term_meta] => 1
            [update_post_meta_cache] => 1
            [nopaging] => 
            [comments_per_page] => 50
            [no_found_rows] => 
            [taxonomy] => ilsi_committee
            [term_id] => Assess Macronutrient
        )

    [tax_query] => WP_Tax_Query Object
        (
            [queries] => Array
                (
                    [0] => Array
                        (
                            [taxonomy] => ilsi_committee
                            [terms] => Array
                                (
                                    [0] => Assess Macronutrient
                                )

                            [field] => name
                            [operator] => IN
                            [include_children] => 1
                        )

                )

            [relation] => AND
            [table_aliases:protected] => Array
                (
                    [0] => wp_term_relationships
                )

            [queried_terms] => Array
                (
                    [ilsi_committee] => Array
                        (
                            [terms] => Array
                                (
                                    [0] => Assess Macronutrient
                                )

                            [field] => name
                        )

                )

            [primary_table] => wp_posts
            [primary_id_column] => ID
        )

    [meta_query] => WP_Meta_Query Object
        (
            [queries] => Array
                (
                    [0] => Array
                        (
                            [key] => _ilsi_date
                        )

                    [1] => Array
                        (
                            [0] => Array
                                (
                                    [key] => _ilsi_date
                                    [value] => 2021-01-17
                                    [compare] => >=
                                    [type] => DATE
                                )

                            [relation] => OR
                        )

                    [relation] => AND
                )

            [relation] => AND
            [meta_table] => wp_postmeta
            [meta_id_column] => post_id
            [primary_table] => wp_posts
            [primary_id_column] => ID
            [table_aliases:protected] => Array
                (
                    [0] => wp_postmeta
                    [1] => mt1
                )

            [clauses:protected] => Array
                (
                    [wp_postmeta] => Array
                        (
                            [key] => _ilsi_date
                            [compare] => =
                            [compare_key] => =
                            [alias] => wp_postmeta
                            [cast] => CHAR
                        )

                    [mt1] => Array
                        (
                            [key] => _ilsi_date
                            [value] => 2021-01-17
                            [compare] => >=
                            [type] => DATE
                            [compare_key] => =
                            [alias] => mt1
                            [cast] => DATE
                        )

                )

            [has_or_relation:protected] => 
        )

    [date_query] => 
    [request] => SELECT SQL_CALC_FOUND_ROWS  wp_posts.ID
					 FROM wp_posts  LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )  INNER JOIN wp_postmeta AS mt1 ON ( wp_posts.ID = mt1.post_id )
					 WHERE 1=1  AND ( 
  wp_term_relationships.term_taxonomy_id IN (592)
) AND ( 
  wp_postmeta.meta_key = '_ilsi_date' 
  AND 
  ( 
    ( mt1.meta_key = '_ilsi_date' AND CAST(mt1.meta_value AS DATE) >= '2021-01-17' )
  )
) AND ((wp_posts.post_type = 'publication' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'acf-disabled')))
					 GROUP BY wp_posts.ID
					 ORDER BY wp_postmeta.meta_value DESC
					 LIMIT 0, 5
    [posts] => Array
        (
            [0] => WP_Post Object
                (
                    [ID] => 36364
                    [post_author] => 291
                    [post_date] => 2024-12-02 15:02:49
                    [post_date_gmt] => 2024-12-02 20:02:49
                    [post_content] => 
                    [post_title] => Are People Consuming the Diets They Say They Are? Self-Reported vs Estimated Adherence to Low-Carbohydrate and Low-Fat Diets: National Health and Nutrition Examination Survey, 2007-2018
                    [post_excerpt] => 
                    [post_status] => publish
                    [comment_status] => closed
                    [ping_status] => closed
                    [post_password] => 
                    [post_name] => are-people-consuming-the-diets-they-say-they-are-self-reported-vs-estimated-adherence-to-low-carbohydrate-and-low-fat-diets-national-health-and-nutrition-examination-survey-2007-2018
                    [to_ping] => 
                    [pinged] => 
                    [post_modified] => 2025-12-09 09:32:02
                    [post_modified_gmt] => 2025-12-09 14:32:02
                    [post_content_filtered] => 
                    [post_parent] => 0
                    [guid] => https://iafns.org/?post_type=publication&p=36364
                    [menu_order] => 0
                    [post_type] => publication
                    [post_mime_type] => 
                    [comment_count] => 0
                    [filter] => raw
                )

            [1] => WP_Post Object
                (
                    [ID] => 36558
                    [post_author] => 291
                    [post_date] => 2025-01-06 15:57:55
                    [post_date_gmt] => 2025-01-06 20:57:55
                    [post_content] => 
                    [post_title] => Micronutrient Inadequacy Differs by Intake of Fat Amount and Class Among Adults That Consume a Restricted Carbohydrate Diet: National Health and Nutrition Examination Survey, 2007-2018
                    [post_excerpt] => 
                    [post_status] => publish
                    [comment_status] => closed
                    [ping_status] => closed
                    [post_password] => 
                    [post_name] => micronutrient-inadequacy-differs-by-intake-of-fat-amount-and-class-among-adults-that-consume-a-restricted-carbohydrate-diet-national-health-and-nutrition-examination-survey-2007-2018
                    [to_ping] => 
                    [pinged] => 
                    [post_modified] => 2025-12-09 09:31:30
                    [post_modified_gmt] => 2025-12-09 14:31:30
                    [post_content_filtered] => 
                    [post_parent] => 0
                    [guid] => https://iafns.org/?post_type=publication&p=36558
                    [menu_order] => 0
                    [post_type] => publication
                    [post_mime_type] => 
                    [comment_count] => 0
                    [filter] => raw
                )

            [2] => WP_Post Object
                (
                    [ID] => 34355
                    [post_author] => 291
                    [post_date] => 2024-03-04 09:07:36
                    [post_date_gmt] => 2024-03-04 14:07:36
                    [post_content] => 
                    [post_title] => Restricted Carbohydrate Diets Below 45% Energy are not Associated with Risk of Mortality in the National Health and Nutrition Examination Survey, 1999–2018
                    [post_excerpt] => 
                    [post_status] => publish
                    [comment_status] => closed
                    [ping_status] => closed
                    [post_password] => 
                    [post_name] => restricted-carbohydrate-diets-below-45-energy-are-not-associated-with-risk-of-mortality-in-the-national-health-and-nutrition-examination-survey-1999-2018
                    [to_ping] => 
                    [pinged] => 
                    [post_modified] => 2025-12-09 09:32:10
                    [post_modified_gmt] => 2025-12-09 14:32:10
                    [post_content_filtered] => 
                    [post_parent] => 0
                    [guid] => https://iafns.org/?post_type=publication&p=34355
                    [menu_order] => 0
                    [post_type] => publication
                    [post_mime_type] => 
                    [comment_count] => 0
                    [filter] => raw
                )

            [3] => WP_Post Object
                (
                    [ID] => 36564
                    [post_author] => 291
                    [post_date] => 2025-01-06 16:09:59
                    [post_date_gmt] => 2025-01-06 21:09:59
                    [post_content] => 
                    [post_title] => Carbohydrate Intakes Below Recommendations With a High Intake of Fat Are Associated With Higher Prevalence of Metabolic Syndrome
                    [post_excerpt] => 
                    [post_status] => publish
                    [comment_status] => closed
                    [ping_status] => closed
                    [post_password] => 
                    [post_name] => carbohydrate-intakes-below-recommendations-with-a-high-intake-of-fat-are-associated-with-higher-prevalence-of-metabolic-syndrome
                    [to_ping] => 
                    [pinged] => 
                    [post_modified] => 2025-12-09 09:31:35
                    [post_modified_gmt] => 2025-12-09 14:31:35
                    [post_content_filtered] => 
                    [post_parent] => 0
                    [guid] => https://iafns.org/?post_type=publication&p=36564
                    [menu_order] => 0
                    [post_type] => publication
                    [post_mime_type] => 
                    [comment_count] => 0
                    [filter] => raw
                )

            [4] => WP_Post Object
                (
                    [ID] => 30731
                    [post_author] => 291
                    [post_date] => 2023-02-02 14:22:30
                    [post_date_gmt] => 2023-02-02 14:22:30
                    [post_content] => 
                    [post_title] => Fat Intake Modifies the Association between Restricted Carbohydrate Diets and Prevalent Cardiometabolic Diseases among Adults in the United States: National Health and Nutrition Examination Survey, 1999–2018
                    [post_excerpt] => 
                    [post_status] => publish
                    [comment_status] => closed
                    [ping_status] => closed
                    [post_password] => 
                    [post_name] => fat-intake-modifies-the-association-between-restricted-carbohydrate-diets-and-prevalent-cardiometabolic-diseases-among-adults-in-the-united-states-national-health-and-nutrition-examination-survey-19
                    [to_ping] => 
                    [pinged] => 
                    [post_modified] => 2025-12-09 09:32:16
                    [post_modified_gmt] => 2025-12-09 14:32:16
                    [post_content_filtered] => 
                    [post_parent] => 0
                    [guid] => https://iafns.org/?post_type=publication&p=30731
                    [menu_order] => 0
                    [post_type] => publication
                    [post_mime_type] => 
                    [comment_count] => 0
                    [filter] => raw
                )

        )

    [post_count] => 5
    [current_post] => -1
    [before_loop] => 
    [in_the_loop] => 
    [post] => WP_Post Object
        (
            [ID] => 36364
            [post_author] => 291
            [post_date] => 2024-12-02 15:02:49
            [post_date_gmt] => 2024-12-02 20:02:49
            [post_content] => 
            [post_title] => Are People Consuming the Diets They Say They Are? Self-Reported vs Estimated Adherence to Low-Carbohydrate and Low-Fat Diets: National Health and Nutrition Examination Survey, 2007-2018
            [post_excerpt] => 
            [post_status] => publish
            [comment_status] => closed
            [ping_status] => closed
            [post_password] => 
            [post_name] => are-people-consuming-the-diets-they-say-they-are-self-reported-vs-estimated-adherence-to-low-carbohydrate-and-low-fat-diets-national-health-and-nutrition-examination-survey-2007-2018
            [to_ping] => 
            [pinged] => 
            [post_modified] => 2025-12-09 09:32:02
            [post_modified_gmt] => 2025-12-09 14:32:02
            [post_content_filtered] => 
            [post_parent] => 0
            [guid] => https://iafns.org/?post_type=publication&p=36364
            [menu_order] => 0
            [post_type] => publication
            [post_mime_type] => 
            [comment_count] => 0
            [filter] => raw
        )

    [comment_count] => 0
    [current_comment] => -1
    [found_posts] => 6
    [max_num_pages] => 2
    [max_num_comment_pages] => 0
    [is_single] => 
    [is_preview] => 
    [is_page] => 
    [is_archive] => 1
    [is_date] => 
    [is_year] => 
    [is_month] => 
    [is_day] => 
    [is_time] => 
    [is_author] => 
    [is_category] => 
    [is_tag] => 
    [is_tax] => 1
    [is_search] => 
    [is_feed] => 
    [is_comment_feed] => 
    [is_trackback] => 
    [is_home] => 
    [is_privacy_policy] => 
    [is_404] => 
    [is_embed] => 
    [is_paged] => 
    [is_admin] => 
    [is_attachment] => 
    [is_singular] => 
    [is_robots] => 
    [is_favicon] => 
    [is_posts_page] => 
    [is_post_type_archive] => 
    [query_vars_hash:WP_Query:private] => d8b697ff278237f95902ee66724e617d
    [query_vars_changed:WP_Query:private] => 
    [thumbnails_cached] => 
    [allow_query_attachment_by_filename:protected] => 
    [stopwords:WP_Query:private] => 
    [compat_fields:WP_Query:private] => Array
        (
            [0] => query_vars_hash
            [1] => query_vars_changed
        )

    [compat_methods:WP_Query:private] => Array
        (
            [0] => init_query_flags
            [1] => parse_tax_query
        )

    [query_cache_key:WP_Query:private] => wp_query:85d1db9d4ab657bae6feca0cce2ae846:0.45358400 17686235880.43957800 1768623588
)

Other Projects Supported by the Committee

Translating Carbohydrate Quality Into Evidence-Based, Consumer-Relevant Approaches

Reducing Carbohydrate Confusion At IAFNS, we advance food safety through rigorous research, collaboration, and science-based guidance. Clarifying Carbohydrate Choices Consumer confusion about carbohydrates can lead […]

Metabolic and Physiological Effects of Added Fibers for Children Across the Age Spectrum

Science for Growing Bodies At IAFNS, we advance food safety through rigorous research, collaboration, and science-based guidance. Clarifying how added fibers support health during growth […]

Assess Macronutrient Intakes and Diet Quality for Contemporary Consumer Diets

Diet Quality Implications At IAFNS, we advance food safety through rigorous research, collaboration, and science-based guidance. Understanding Restrictive Diets A wide range of self-selected contemporary […]