(1) https://www.ncbi.nlm.nih.gov/pubmed/19543765

(2) http://articles.mercola.com/sites/articles/archive/2014/05/28/vitamin-d-deficiency-signs-symptoms.aspx

(3) http://www.ajgponline.org/article/S1064-7481(12)60890-2/abstract

(4) http://europepmc.org/abstract/med/10888476

(5) http://msutoday.msu.edu/news/2014/low-vitamin-d-may-play-role-in-suicide-attempts/

(6) https://www.ncbi.nlm.nih.gov/pubmed/635065

(7) https://www.ncbi.nlm.nih.gov/pubmed/17568057

(8) https://www.ncbi.nlm.nih.gov/pubmed/17909167

(9) https://www.ncbi.nlm.nih.gov/pubmed/16292022

(10) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606117/

(11) https://www.ncbi.nlm.nih.gov/pubmed/23007624

(12) https://www.ncbi.nlm.nih.gov/pubmed/25025656

(13) https://www.ncbi.nlm.nih.gov/pubmed/19625884

(14) https://www.ncbi.nlm.nih.gov/pubmed/24047633

(15) http://www.optimallivingdynamics.com/blog/3-important-nutrients-that-will-actually-support-your-brain

(16) http://www.ncbi.nlm.nih.gov/pubmed/25027582

(17) http://www.ncbi.nlm.nih.gov/pubmed/22016520

(18) http://www.ncbi.nlm.nih.gov/pubmed/16542786

(19) http://www.ncbi.nlm.nih.gov/pubmed/19158231

(20) http://www.ncbi.nlm.nih.gov/pubmed/22664333

(21) http://www.ncbi.nlm.nih.gov/pubmed/21939673

(22) http://www.ncbi.nlm.nih.gov/pubmed/22673824

(23) http://www.ncbi.nlm.nih.gov/pubmed/15145706

(24) http://www.ncbi.nlm.nih.gov/pubmed/18766297

(25) http://www.ncbi.nlm.nih.gov/pubmed/24621065

(26) http://www.sciencedirect.com/science/article/

(27) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868572/

(28) https://www.ncbi.nlm.nih.gov/pubmed/21798601

(29) https://www.ncbi.nlm.nih.gov/pubmed/24130605

(30) https://www.ncbi.nlm.nih.gov/pubmed/20689416

(31) https://www.ncbi.nlm.nih.gov/pubmed/18655800

(32) https://www.ncbi.nlm.nih.gov/pubmed/16491668

(33) https://www.ncbi.nlm.nih.gov/pubmed/24309856

(34) https://www.ncbi.nlm.nih.gov/pubmed/10896698

(35) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3078648/

(36) https://www.ncbi.nlm.nih.gov/pubmed/15585771

(37) https://www.ncbi.nlm.nih.gov/pubmed/24309856

(38) https://www.ncbi.nlm.nih.gov/pubmed/12601225

(39) https://www.ncbi.nlm.nih.gov/pubmed/15545331

(40) http://emedicine.medscape.com/article/1952251-overview

(41) https://www.ncbi.nlm.nih.gov/pubmed/27035272

(42) https://www.ncbi.nlm.nih.gov/pubmed/24309856

(43) https://www.ncbi.nlm.nih.gov/pubmed/22421956

(44) https://www.ncbi.nlm.nih.gov/pubmed/10448523

(45) https://www.ncbi.nlm.nih.gov/pubmed/17093148

(46) http://www.cbc.ca/news/health/celiac-disease-1.4343691

(47) http://www.sciencedaily.com/releases/2006/10/061010022602.htm

(48) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3184556/

(49) http://onlinelibrary.wiley.com/doi/10.1111/apt.12809/full

(50) https://www.ncbi.nlm.nih.gov/pubmed/14716525/

(51) https://www.ncbi.nlm.nih.gov/pubmed/12217453

(52) https://www.ncbi.nlm.nih.gov/pubmed/14716525/

(53) https://www.ncbi.nlm.nih.gov/pubmed/17030405/

(54) https://www.ncbi.nlm.nih.gov/pubmed/20545470/

(55) https://www.ncbi.nlm.nih.gov/pubmed/10086676/

(56) http://onlinelibrary.wiley.com/doi/10.1111/apt.12730/abstract

(57) https://www.ncbi.nlm.nih.gov/pubmed/24689456

(58) https://www.ncbi.nlm.nih.gov/pubmed/10086676

(59) https://www.ncbi.nlm.nih.gov/pubmed/15774013/

(60) https://www.ncbi.nlm.nih.gov/pubmed/6192458/

(61) https://www.ncbi.nlm.nih.gov/pubmed/12217453/

(62) https://www.ncbi.nlm.nih.gov/pubmed/14716525/

(63) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3641836/

(64) https://www.ncbi.nlm.nih.gov/pubmed/17030405/

(65) https://www.ncbi.nlm.nih.gov/pubmed/10086676/

(66) https://jamanetwork.com/journals/jamapsychiatry/fullarticle/207557

(67) http://www.sciencedirect.com/science/article/pii/S0149763414002048

(68) https://www.ncbi.nlm.nih.gov/pubmed/26681493

(69) https://www.ncbi.nlm.nih.gov/pubmed/16402130/

(70) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1810582/

(71) https://www.ncbi.nlm.nih.gov/pubmed/3347350/

(72) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1810582/

(73) https://www.ncbi.nlm.nih.gov/pubmed/17074966/

(74) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2465760/

(75) https://www.ncbi.nlm.nih.gov/pubmed/23831680

(76) https://www.ncbi.nlm.nih.gov/pubmed/15671130

(77) https://www.ncbi.nlm.nih.gov/pubmed/26177556

(78) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4487875/

(79) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4397473/

(80) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2751626/

(81) https://www.ncbi.nlm.nih.gov/pubmed/1620329

(82) https://www.ncbi.nlm.nih.gov/pubmed/7943444

(83) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5481283/

(84) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2430045/

(85) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976119/

(86) http://www.diabetesincontrol.com/fasting-blood-glucose-predicts-depression-in-nondiabetics/

(87) http://www.diabetesincontrol.com/fasting-blood-glucose-predicts-depression-in-nondiabetics/ 

(88) https://www.ncbi.nlm.nih.gov/pubmed/23877807

(89) https://www.hindawi.com/journals/drt/2011/862708/

(90) https://www.ncbi.nlm.nih.gov/pubmed/19892320

(91) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4163110/

(92) https://www.ncbi.nlm.nih.gov/pubmed/20673594

(93) https://www.psychologytoday.com/blog/urban-survival/201701/new-research-shows-depression-linked-inflammation

(94) https://www.ncbi.nlm.nih.gov/pubmed/19188531

(95) https://www.ncbi.nlm.nih.gov/pubmed/21037214

(96) http://www.apa.org/monitor/2013/07-08/nimh.aspx