Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W1756348754', 'doi': 'https://doi.org/10.1093/ajcn/58.1.4', 'title': 'Vitamin requirements of elderly people: an update', 'display_name': 'Vitamin requirements of elderly people: an update', 'publication_year': 1993, 'publication_date': '1993-07-01', 'ids': {'openalex': 'https://openalex.org/W1756348754', 'doi': 'https://doi.org/10.1093/ajcn/58.1.4', 'mag': '1756348754', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/8317387'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1093/ajcn/58.1.4', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S71285955', 'display_name': 'American Journal of Clinical Nutrition', 'issn_l': '0002-9165', 'issn': ['0002-9165', '1938-3207'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'review', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': True, 'oa_status': 'bronze', 'oa_url': 'https://doi.org/10.1093/ajcn/58.1.4', 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5102069725', 'display_name': 'RM Russell', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I121934306', 'display_name': 'Tufts University', 'ror': 'https://ror.org/05wvpxv85', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I121934306']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'R M Russell', 'raw_affiliation_strings': ['US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111.'], 'affiliations': [{'raw_affiliation_string': 'US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111.', 'institution_ids': ['https://openalex.org/I121934306']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5041437624', 'display_name': 'Paolo M. Suter', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'P M Suter', 'raw_affiliation_strings': [], 'affiliations': []}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 5000, 'currency': 'USD', 'value_usd': 5000, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 2.264, 'has_fulltext': False, 'cited_by_count': 145, 'citation_normalized_percentile': {'value': 0.800781, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 97, 'max': 98}, 'biblio': {'volume': '58', 'issue': '1', 'first_page': '4', 'last_page': '14'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T12554', 'display_name': 'Role of Vitamin C in Health and Disease', 'score': 0.9972, 'subfield': {'id': 'https://openalex.org/subfields/2916', 'display_name': 'Nutrition and Dietetics'}, 'field': {'id': 'https://openalex.org/fields/29', 'display_name': 'Nursing'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, 'topics': [{'id': 'https://openalex.org/T12554', 'display_name': 'Role of Vitamin C in Health and Disease', 'score': 0.9972, 'subfield': {'id': 'https://openalex.org/subfields/2916', 'display_name': 'Nutrition and Dietetics'}, 'field': {'id': 'https://openalex.org/fields/29', 'display_name': 'Nursing'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, {'id': 'https://openalex.org/T10499', 'display_name': 'Role of Homocysteine in Health and Disease', 'score': 0.9962, 'subfield': {'id': 'https://openalex.org/subfields/2745', 'display_name': 'Rheumatology'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, {'id': 'https://openalex.org/T10397', 'display_name': 'Sarcopenia: Definition, Diagnosis, and Implications', 'score': 0.989, 'subfield': {'id': 'https://openalex.org/subfields/2737', 'display_name': 'Physiology'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/dietary-reference-intake', 'display_name': 'Dietary Reference Intake', 'score': 0.5744745}, {'id': 'https://openalex.org/keywords/elderly-people', 'display_name': 'Elderly people', 'score': 0.55236286}, {'id': 'https://openalex.org/keywords/aging', 'display_name': 'Aging', 'score': 0.520879}, {'id': 'https://openalex.org/keywords/nutritional-status', 'display_name': 'Nutritional Status', 'score': 0.518498}], 'concepts': [{'id': 'https://openalex.org/C2776940978', 'wikidata': 'https://www.wikidata.org/wiki/Q34956', 'display_name': 'Vitamin', 'level': 2, 'score': 0.7078662}, {'id': 'https://openalex.org/C2776155809', 'wikidata': 'https://www.wikidata.org/wiki/Q130365', 'display_name': 'Riboflavin', 'level': 2, 'score': 0.6732588}, {'id': 'https://openalex.org/C551997983', 'wikidata': 'https://www.wikidata.org/wiki/Q12167', 'display_name': 'Malnutrition', 'level': 2, 'score': 0.6674843}, {'id': 'https://openalex.org/C37281782', 'wikidata': 'https://www.wikidata.org/wiki/Q1412867', 'display_name': 'Dietary Reference Intake', 'level': 3, 'score': 0.5744745}, {'id': 'https://openalex.org/C3018697994', 'wikidata': 'https://www.wikidata.org/wiki/Q191089', 'display_name': 'Elderly people', 'level': 2, 'score': 0.55236286}, {'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.5320474}, {'id': 'https://openalex.org/C74909509', 'wikidata': 'https://www.wikidata.org/wiki/Q10387', 'display_name': 'Gerontology', 'level': 1, 'score': 0.4518565}, {'id': 'https://openalex.org/C124490489', 'wikidata': 'https://www.wikidata.org/wiki/Q7936963', 'display_name': 'Vitamin D and neurology', 'level': 2, 'score': 0.41104046}, {'id': 'https://openalex.org/C42407357', 'wikidata': 'https://www.wikidata.org/wiki/Q521', 'display_name': 'Physiology', 'level': 1, 'score': 0.34974182}, {'id': 'https://openalex.org/C134018914', 'wikidata': 'https://www.wikidata.org/wiki/Q162606', 'display_name': 'Endocrinology', 'level': 1, 'score': 0.26972985}, {'id': 'https://openalex.org/C126322002', 'wikidata': 'https://www.wikidata.org/wiki/Q11180', 'display_name': 'Internal medicine', 'level': 1, 'score': 0.18464327}, {'id': 'https://openalex.org/C31903555', 'wikidata': 'https://www.wikidata.org/wiki/Q1637030', 'display_name': 'Food science', 'level': 1, 'score': 0.1744858}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.1510858}, {'id': 'https://openalex.org/C142796444', 'wikidata': 'https://www.wikidata.org/wiki/Q181394', 'display_name': 'Nutrient', 'level': 2, 'score': 0.08635339}, {'id': 'https://openalex.org/C18903297', 'wikidata': 'https://www.wikidata.org/wiki/Q7150', 'display_name': 'Ecology', 'level': 1, 'score': 0.0}], 'mesh': [{'descriptor_ui': 'D000375', 'descriptor_name': 'Aging', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': True}, {'descriptor_ui': 'D009751', 'descriptor_name': 'Nutritional Requirements', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': True}, {'descriptor_ui': 'D014815', 'descriptor_name': 'Vitamins', 'qualifier_ui': 'Q000008', 'qualifier_name': 'administration & dosage', 'is_major_topic': True}, {'descriptor_ui': 'D000368', 'descriptor_name': 'Aged', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D000375', 'descriptor_name': 'Aging', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D005260', 'descriptor_name': 'Female', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D006801', 'descriptor_name': 'Humans', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D008297', 'descriptor_name': 'Male', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D008875', 'descriptor_name': 'Middle Aged', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D014815', 'descriptor_name': 'Vitamins', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}], 'locations_count': 2, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.1093/ajcn/58.1.4', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S71285955', 'display_name': 'American Journal of Clinical Nutrition', 'issn_l': '0002-9165', 'issn': ['0002-9165', '1938-3207'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/8317387', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1093/ajcn/58.1.4', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S71285955', 'display_name': 'American Journal of Clinical Nutrition', 'issn_l': '0002-9165', 'issn': ['0002-9165', '1938-3207'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [{'display_name': 'Zero hunger', 'score': 0.81, 'id': 'https://metadata.un.org/sdg/2'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 132, 'referenced_works': ['https://openalex.org/W124588829', 'https://openalex.org/W132769338', 'https://openalex.org/W1441770633', 'https://openalex.org/W1483487281', 'https://openalex.org/W1529319929', 'https://openalex.org/W1604024471', 'https://openalex.org/W1607120189', 'https://openalex.org/W1616650436', 'https://openalex.org/W167909355', 'https://openalex.org/W1693131129', 'https://openalex.org/W1774542004', 'https://openalex.org/W1790612435', 'https://openalex.org/W1821057022', 'https://openalex.org/W1821889089', 'https://openalex.org/W1839722270', 'https://openalex.org/W1846303846', 'https://openalex.org/W1849909466', 'https://openalex.org/W1855308453', 'https://openalex.org/W1883851267', 'https://openalex.org/W1896005668', 'https://openalex.org/W1900030636', 'https://openalex.org/W1908874308', 'https://openalex.org/W1928136714', 'https://openalex.org/W1932252588', 'https://openalex.org/W1937222937', 'https://openalex.org/W1937435117', 'https://openalex.org/W1939117920', 'https://openalex.org/W1964225001', 'https://openalex.org/W1966125778', 'https://openalex.org/W1970422462', 'https://openalex.org/W1975387640', 'https://openalex.org/W1979986544', 'https://openalex.org/W1982519585', 'https://openalex.org/W1983297109', 'https://openalex.org/W1985456307', 'https://openalex.org/W1986561365', 'https://openalex.org/W1987546643', 'https://openalex.org/W1987770924', 'https://openalex.org/W1987933210', 'https://openalex.org/W2000864446', 'https://openalex.org/W2006061630', 'https://openalex.org/W2008162971', 'https://openalex.org/W201348720', 'https://openalex.org/W2016846453', 'https://openalex.org/W2028771522', 'https://openalex.org/W2029171424', 'https://openalex.org/W2031009057', 'https://openalex.org/W2034105486', 'https://openalex.org/W2034383676', 'https://openalex.org/W2041729372', 'https://openalex.org/W2042029418', 'https://openalex.org/W2042373753', 'https://openalex.org/W2044390892', 'https://openalex.org/W2044477587', 'https://openalex.org/W2045246093', 'https://openalex.org/W2045771559', 'https://openalex.org/W2046955600', 'https://openalex.org/W2048651082', 'https://openalex.org/W2048934953', 'https://openalex.org/W2049392332', 'https://openalex.org/W2051696425', 'https://openalex.org/W2063666844', 'https://openalex.org/W2064667765', 'https://openalex.org/W2065634792', 'https://openalex.org/W2066095636', 'https://openalex.org/W2066186216', 'https://openalex.org/W2067419903', 'https://openalex.org/W2067508148', 'https://openalex.org/W2073695143', 'https://openalex.org/W2073925042', 'https://openalex.org/W2085577787', 'https://openalex.org/W2087280440', 'https://openalex.org/W2089889684', 'https://openalex.org/W2095572211', 'https://openalex.org/W2099023343', 'https://openalex.org/W2100954433', 'https://openalex.org/W2105513870', 'https://openalex.org/W2107494983', 'https://openalex.org/W2111304495', 'https://openalex.org/W2112272583', 'https://openalex.org/W2114490649', 'https://openalex.org/W2115373718', 'https://openalex.org/W2116866428', 'https://openalex.org/W2140381011', 'https://openalex.org/W2141163070', 'https://openalex.org/W2155375663', 'https://openalex.org/W2156578034', 'https://openalex.org/W2156803340', 'https://openalex.org/W2160593470', 'https://openalex.org/W2160822846', 'https://openalex.org/W2163770333', 'https://openalex.org/W2167008166', 'https://openalex.org/W2167065953', 'https://openalex.org/W2167908108', 'https://openalex.org/W2169996348', 'https://openalex.org/W2174752097', 'https://openalex.org/W2184881785', 'https://openalex.org/W2239217409', 'https://openalex.org/W2257753345', 'https://openalex.org/W2259654026', 'https://openalex.org/W2272724052', 'https://openalex.org/W2273491497', 'https://openalex.org/W2323973349', 'https://openalex.org/W2324537316', 'https://openalex.org/W2326469489', 'https://openalex.org/W2326712346', 'https://openalex.org/W2335368915', 'https://openalex.org/W2336468246', 'https://openalex.org/W2394596984', 'https://openalex.org/W2398632515', 'https://openalex.org/W2399906014', 'https://openalex.org/W2401282355', 'https://openalex.org/W2404512350', 'https://openalex.org/W2406518529', 'https://openalex.org/W2410668374', 'https://openalex.org/W2415849371', 'https://openalex.org/W2415886551', 'https://openalex.org/W2416381167', 'https://openalex.org/W2418551799', 'https://openalex.org/W2418706227', 'https://openalex.org/W2460857435', 'https://openalex.org/W2461296801', 'https://openalex.org/W2466285101', 'https://openalex.org/W2487267537', 'https://openalex.org/W2536994006', 'https://openalex.org/W27884690', 'https://openalex.org/W3015008339', 'https://openalex.org/W3024274063', 'https://openalex.org/W4240870886', 'https://openalex.org/W4243697499', 'https://openalex.org/W4754294', 'https://openalex.org/W575264515'], 'related_works': ['https://openalex.org/W2427206928', 'https://openalex.org/W2299896267', 'https://openalex.org/W2122466491', 'https://openalex.org/W2101873661', 'https://openalex.org/W2092507851', 'https://openalex.org/W1959049290', 'https://openalex.org/W191571054', 'https://openalex.org/W1856965838', 'https://openalex.org/W1756348754', 'https://openalex.org/W1488434438'], 'abstract_inverted_index': {'This': [0], 'article': [1], 'is': [2, 25, 37, 81], 'an': [3, 86], 'update': [4], 'of': [5, 10, 13, 28], 'our': [6], '1987': [7], 'literature': [8], 'review': [9], 'vitamin': [11, 30, 63, 66, 69, 75], 'requirements': [12], 'elderly': [14, 33, 60], 'people': [15, 61], '(Am': [16], 'J': [17], 'Clin': [18], 'Nutr': [19], '1987;45:501': [20], '–12).': [21], 'Poor': [22], 'dietary': [23, 51], 'intake': [24], 'the': [26, 43, 89], 'cause': [27], 'much': [29], 'malnutrition': [31], 'in': [32], 'people.': [34], 'Nevertheless,': [35], 'there': [36, 80], 'strong': [38], 'evidence': [39], 'that': [40], 'aging': [41], 'affects': [42], 'requirement': [44], 'for': [45, 59, 62, 74, 88], 'certain': [46], 'vitamins.': [47], 'The': [48], '1989': [49], 'recommended': [50], 'allowances': [52], '(RDAs)': [53], 'appear': [54], 'to': [55, 84], 'be': [56], 'too': [57, 72], 'low': [58], 'D,': [64], 'riboflavin,': [65], 'B−6,': [67], 'and': [68, 71], 'B−12.': [70], 'high': [73], 'A.': [76], 'For': [77], 'several': [78], 'vitamins': [79], 'enough': [82], 'information': [83], 'establish': [85], 'RDA': [87], 'category': [90], '≥': [91], '70': [92], 'y.': [93]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1756348754', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2022, 'cited_by_count': 1}, {'year': 2020, 'cited_by_count': 3}, {'year': 2019, 'cited_by_count': 2}, {'year': 2018, 'cited_by_count': 3}, {'year': 2017, 'cited_by_count': 1}, {'year': 2015, 'cited_by_count': 4}, {'year': 2014, 'cited_by_count': 2}, {'year': 2013, 'cited_by_count': 5}, {'year': 2012, 'cited_by_count': 2}], 'updated_date': '2024-09-19T23:58:07.599818', 'created_date': '2016-06-24'}