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There are 173 published clinical (human) studies on K2 according to a Pubmed search. Many of them are sponsored and published by academia bodies, not private companies.
The results of these studies are copyrighted, however quoting small sections that are directly relevant to something one is writing about is acceptable under Fair Use, as long as one provides an appropriate citation. Summarizing and quoting from a medical article in a news article (Commentary, Criticism, “transformative” purpose) is considered a fair use according to this source. All human clinical studies were designed and performed on Menaquinone-7 chemical compound which does not differ in terms of bioavailability or safety profile regardless if obtained through organic synthesis or biochemistry (industrial fermentation). Vitamin K2 offered in the market differs only in terms of purity offered and presentation oil, powder, microcapsule. We encourage all our clients to produce educational content based on the available study results and fair use policy. In case of advertising of a specific brand, use of third-party study results is prohibited.
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TITLE
Dietary supplements to reduce symptom severity and duration in people with SARS-CoV-2: a double-blind randomised controlled trial
AUTHORS
Dugald Seely , Mark Legacy , Ellen Conte , Caitlyn Keates , Athanasios Psihogios , Tim Ramsay , Dean A Fergusson , Salmaan Kanji , John-Graydon Simmons , Kumanan Wilson
The Canadian College of Naturopathic Medicine
CATEGORY
Nutrition & Diet
DATE
Sep 2023
KEYWORDS
COMPLEMENTARY MEDICINE; COVID-19; Clinical Trial
PUBMED LINK
TITLE
Dietary supplements to reduce symptom severity and duration in people with SARS-CoV-2: study protocol for a randomised, double-blind, placebo controlled clinical trial
AUTHORS
Mark Legacy, Dugald Seely, Ellen Conte, Athanasios Psihogios, Tim Ramsay, Dean A Fergusson, Salmaan Kanji, John-Graydon Simmons, Kumanan Wilson
The Canadian College of Naturopathic Medicine
CATEGORY
Nutrition & Diet
DATE
Mar 2022
KEYWORDS
COVID-19; clinical trials; complementary medicine
PUBMED LINK
TITLE
Vitamin K intake and prostate cancer risk in the Prostate, Lung, Colorectal, and Ovarian Cancer (PLCO) Screening Trial
AUTHORS
Margaret Hoyt , Michael Reger , Andrew Marley , Hao Fan , Ziyue Liu , Jianjun Zhang
no funding
CATEGORY
Nutrition & Diet
DATE
Feb 2019
KEYWORDS
menaquinonephylloquinoneprostate cancernutritioncohort studyPLCO
PUBMED LINK
TITLE
Low vitamin K1 intake in haemodialysis patients
AUTHORS
Maria Fusaro , Claudia D'Alessandro , Marianna Noale , Giovanni Tripepi , Mario Plebani , Nicola Veronese , Giorgio Iervasi , Sandro Giannini , Maurizio Rossini , Giovanni Tarroni , Sandro Lucatello , Alberto Vianello , Irene Santinello , Luciana Bonfante , Fabrizio Fabris , Stefania Sella , Antonio Piccoli , Agostino Naso , Daniele Ciurlino , Andrea Aghi , Maurizio Gallieni , Adamasco Cupisti
-
CATEGORY
Nutrition & Diet
DATE
Apr 2017
KEYWORDS
Dialysis; Diet; Haemodialysis; Menaquinone; Nutrition; Phylloquinone
PUBMED LINK
TITLE
Steady-state vitamin K2 (menaquinone-7) plasma concentrations after intake of dairy products and soft gel capsules.
AUTHORS
Knapen MH, Braam LA, Teunissen KJ, Van't Hoofd CM, Zwijsen RM, van den Heuvel EG, Vermeer C
R&D Group VitaK (Maastricht University, Holandia), FrieslandCampina (Amersfoort, Holandia)
CATEGORY
Nutrition & Diet
DATE
Jul 2016
KEYWORDS
menaquinone-7 postmenopausal women vitamin K intake vitamin K2 vitamin absorption
PUBMED LINK
TITLE
Dietary intake of vitamin K is inversely associated with mortality risk.
AUTHORS
Juanola-Falgarona M, Salas-Salvado J, Martinez-Gonzalez MA, Corella D, Estruch R, Ros E, Fito M, Aros F, Gomez-Gracia E, Fiol M, Lapetra J, Basora J, Lamuela-Raventos RM, Serra-Majem L, Pinto X, Munoz MA, Ruiz-Gutierrez V, Fernandez-Ballart J, Bullo M
"National Cardiovascular Research Center, Health Research Fund, Ministry of Science and Innovation, Ministry of Health–National Drug Plan, Mapfre Foundation 2010, Government of the Basque Country, University of the Basque Country , the Autonomous Government of Catalonia [joint contract with Institute of Health Carlos III]. CIBER Physiopathology of Obesity and Nutrition and Thematic networks of cooperative health researc"
CATEGORY
Nutrition & Diet
DATE
May 2014
KEYWORDS
"menaquinone-7 mortality risk vitamin K2"
PUBMED LINK
TITLE
Intake of dietary phylloquinone and menaquinones and risk of stroke
AUTHORS
Linda E T Vissers , Geertje W Dalmeijer, Jolanda M A Boer, W M Monique Verschuren, Yvonne T van der Schouw, Joline W J Beulens
European Commission: Public Health and Consumer Protection Directorate; Research Directorate-General; Dutch Ministry of Public Health, Welfare and Sports (WVS); Netherlands Cancer Registry (NKR); LK Research Funds; Dutch Prevention Funds; Dutch ZON (Zorg Onderzoek Nederland); World Cancer Research Fund (WCRF); Netherlands Heart Foundation
CATEGORY
Nutrition & Diet
DATE
Dec 2013
KEYWORDS
diet; menaquinone; phylloquinone; stroke; vitamin K
PUBMED LINK
TITLE
Excretion of the urinary 5C- and 7C-aglycone metabolites of vitamin K by young adults responds to changes in dietary phylloquinone and dihydrophylloquinone intakes.
AUTHORS
Harrington DJ, Booth SL, Card DJ, Shearer MJ
-
CATEGORY
Nutrition & Diet
DATE
Jul 2007
KEYWORDS
phylloquinone urinary excretion of vitamin K metabolites vitamin K1
PUBMED LINK
TITLE
Vitamin K-containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7.
AUTHORS
Schurgers LJ, Teunissen KJ, Hamulyak K, Knapen MH, Vik H, Vermeer C
Natural ASA, Lysaker, Norway (C.V.)
CATEGORY
Nutrition & Diet
DATE
Apr 2007
KEYWORDS
menaquinone-7 phylloquinone vitamin K1 vitamin K2 vitamin absorption
PUBMED LINK
TITLE
Menaquinone-4 in breast milk is derived from dietary phylloquinone.
AUTHORS
Thijssen HH, Drittij MJ, Vermeer C, Schoffelen E
-
CATEGORY
Nutrition & Diet
DATE
Mar 2002
KEYWORDS
menaquinone-4 phylloquinone vitamin K1 vitamin K2
PUBMED LINK
TITLE
Effect of dietary fat content on oral bioavailability of menatetrenone in humans
AUTHORS
T Uematsu, S Nagashima, M Niwa, K Kohno, T Sassa, M Ishii, Y Tomono, C Yamato, M Kanamaru
-
CATEGORY
Nutrition & Diet
DATE
Sep 1996
KEYWORDS
PUBMED LINK
TITLE
Dietary deficiency of phylloquinone and reduced serum levels in febrile neutropenic cancer patients.
AUTHORS
Conly J, Suttie J, Reid E, Loftson J, Ramotar K, Louie T
National Cancer Institute of Canada; Eli Lilly and Company, Toronto, Ontario, Canada; Medical Research Council of Canada
CATEGORY
Nutrition & Diet
DATE
Jul 1989
KEYWORDS
menaquinone phylloquinone vitamin K deficiency vitamin K1 vitamin K2
PUBMED LINK
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