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Immunologic effects of national cholesterol education panel step-2 diets with and without fish-derived N-3 fatty acid enrichment. Meydani SN, Lichtenstein AH, Cornwall S, Meydani M, Goldin BR, Rasmussen H, Dinarello CA, Schaefer EJ. J Clin Invest. 1993 Jul;92(1):105-13. PMID: 8325975 doi:10.1172/JCI116537 the low-fat, high-fish diet significantly decreased the percentage of helper T cells whereas the percentage of suppressor T cells increased

Dietary omega-3 polyunsaturated fatty acids plus vitamin E restore immunodeficiency and prolong survival for severely ill patients with generalized malignancy: a randomized control trial. Gogos CA, Ginopoulos P, Salsa B, Apostolidou E, Zoumbos NC, Kalfarentzos F. Cancer. 1998 Jan 15;82(2):395-402. PMID: 9445198 DOI: 10.1002/(SICI)1097-0142(19980115)82:23.0.CO;2-1 Dietary supplementation with omega-3 PUFA (18 g/day) restored both the Th/Ts cell ratio and TNF production by endotoxin-stimulated PBMC. Our finding is not in accordance with former reports that long term consumption of omega-3 PUFA decreases T cell mitogenic response, DTH, and the percentage of T-helper cells,[28] and this may be the result of the parallel antioxidant effect of vit E. Most significantly, omega-3 PUFA increased the survival of all our patients, ...

The same annual dose of 292 000 IU of vitamin D(3) (cholecalciferol) on either daily or four monthly basis for elderly women: 1-year comparative study of the effects on serum 25(OH)D(3) concentrations and renal function. Pekkarinen T, Välimäki VV, Aarum S, Turpeinen U, Hämäläinen E, Löyttyniemi E, Välimäki MJ. Clin Endocrinol (Oxf). 2009 May 25. [Epub ahead of print] PMID: 19486025 DOI: 10.1111/j.1365-2265.2009.03637.x

Estimation of the dietary requirement for vitamin D in free-living adults >=64 y of age. Cashman KD, Wallace JM, Horigan G, Hill TR, Barnes MS, Lucey AJ, Bonham MP, Taylor N, Duffy EM, Seamans K, Muldowney S, Fitzgerald AP, Flynn A, Strain JJ, Kiely M. Am J Clin Nutr. 2009 May;89(5):1366-74. Epub 2009 Mar 18. PMID: 19297462 doi:10.3945/ajcn.2008.27334 Conclusion: To ensure that the vitamin D requirement is met by the vast majority (>97.5%) of adults aged ≥64 y during winter, between 7.9 and 42.8 µg vitamin D/d is required, depending on summer sun exposure and the threshold of adequacy of 25(OH)D. .

Vitamin D2 is as effective as vitamin D3 in maintaining circulating concentrations of 25-hydroxyvitamin D. Holick MF, Biancuzzo RM, Chen TC, Klein EK, Young A, Bibuld D, Reitz R, Salameh W, Ameri A, Tannenbaum AD. J Clin Endocrinol Metab. 2008 Mar;93(3):677-81. Epub 2007 Dec 18. PMID: 18089691 Conclusion: A 1000 IU dose of vitamin D2 daily was as effective as 1000 IU vitamin D3 in maintaining serum 25-hydroxyvitamin D levels and did not negatively influence serum 25-hydroxyvitamin D3 levels. Therefore, vitamin D2 is equally as effective as vitamin D3 in maintaining 25-hydroxyvitamin D status.

Evidence that vitamin D3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D2. Trang HM, Cole DE, Rubin LA, Pierratos A, Siu S, Vieth R. Am J Clin Nutr. 1998 Oct;68(4):854-8. PMID: 9771862 Although the 1.7-times greater efficacy for vitamin D3 shown here may seem small, it is more than what others have shown for 25(OH)D increases when comparing 2-fold differences in vitamin D3 dose. The assumption that vitamins D2 and D3 have equal nutritional value is probably wrong and should be reconsidered.

Supplementation with cholecalciferol does not improve glycaemic control in diabetic subjects with normal serum 25-hydroxyvitamin D levels. Jorde R, Figenschau Y. Eur J Nutr. 2009 Apr 16. [Epub ahead of print] PMID: 19370371 10.1007/s00394-009-0020-3 Conclusions We were not able to demonstrate that vitamin D supplementation had a significant effect on glucose metabolism in subjects with type 2 diabetes but without vitamin D deficiency. Further studies are needed in larger groups of subjects with type 2 diabetes or impaired glucose tolerance, who also exhibit low serum 25-hydroxyvitamin D levels.

Vitamin D intake to attain a desired serum 25-hydroxyvitamin D concentration. Aloia JF, Patel M, Dimaano R, Li-Ng M, Talwar SA, Mikhail M, Pollack S, Yeh JK. Am J Clin Nutr. 2008 Jun;87(6):1952-8. PMID: 18541590 The mean daily dose was 86 microg (3440 IU). The use of computer simulations to obtain the most participants within the range of 75-220 nmol/L predicted an optimal daily dose of 115 microg/d (4600 IU). No hypercalcemia or hypercalciuria was observed. CONCLUSIONS: Determination of the intake required to attain serum 25(OH)D concentrations >75 nmol/L must consider the wide variability in the dose-response curve and basal 25(OH)D concentrations. Projection of the dose-response curves observed in this convenience sample onto the population of the third National Health and Nutrition Examination Survey suggests a dose of 95 microg/d (3800 IU) for those above a 25(OH)D threshold of 55 nmol/L and a dose of 125 microg/d (5000 IU) for those below that threshold.

A randomized controlled trial of vitamin D3 supplementation for the prevention of symptomatic upper respiratory tract infections. Li-Ng M, Aloia JF, Pollack S, Cunha BA, Mikhail M, Yeh J, Berbari N. Epidemiol Infect. 2009 Mar 19:1-9. [Epub ahead of print] PMID: 19296870

Effects of vitamin D and calcium supplementation on falls: a randomized controlled trial. Bischoff HA, Stähelin HB, Dick W, Akos R, Knecht M, Salis C, Nebiker M, Theiler R, Pfeifer M, Begerow B, Lew RA, Conzelmann M. J Bone Miner Res. 2003 Feb;18(2):343-51. PMID: 12568412 A single intervention with vitamin D plus calcium over a 3-month period reduced the risk of falling by 49% compared with calcium alone. Over this short-term intervention, recurrent fallers seem to benefit most by the treatment. The impact of vitamin D on falls might be explained by the observed improvement in musculoskeletal function.

Vitamin D3 and calcium to prevent hip fractures in the elderly women. Chapuy MC, Arlot ME, Duboeuf F, Brun J, Crouzet B, Arnaud S, Delmas PD, Meunier PJ. N Engl J Med. 1992 Dec 3;327(23):1637-42. PMID: 1331788 CONCLUSIONS. Supplementation with vitamin D3 and calcium reduces the risk of hip fractures and other nonvertebral fractures among elderly women.

Matsuoka, L. Y., Wortsman, J., Hanifan, N. & Holick, M. F. (1988) Chronic sunscreen use decreases circulating concentrations of 25-hydroxyvitamin D: a preliminary study. Arch. Dermatol. 124:1802-1804

Effects of a Mediterranean-style diet on the need for antihyperglycemic drug therapy in patients with newly diagnosed type 2 diabetes: a randomized trial. Esposito K, Maiorino MI, Ciotola M, Di Palo C, Scognamiglio P, Gicchino M, Petrizzo M, Saccomanno F, Beneduce F, Ceriello A, Giugliano D. Ann Intern Med. 2009 Sep 1;151(5):306-14. PMID: 19721018 Conclusion: Compared with a low-fat diet, a low-carbohydrate, Mediterranean-style diet led to more favorable changes in glycemic control and coronary risk factors and delayed the need for antihyperglycemic drug therapy in overweight patients with newly diagnosed type 2 diabetes.

Comparison of daily, weekly, and monthly vitamin D3 in ethanol dosing protocols for two months in elderly hip fracture patients. Ish-Shalom S, Segal E, Salganik T, Raz B, Bromberg IL, Vieth R. J Clin Endocrinol Metab. 2008 Sep;93(9):3430-5. Epub 2008 Jun 10. PMID: 18544622 doi:10.1210/jc.2008-0241 CONCLUSIONS: Supplementation with vitamin D can be achieved equally well with daily, weekly, or monthly dosing frequencies. Therefore, the choice of dose frequency can be based on whichever approach will optimize an individual's adherence with long-term vitamin D supplementation.

Long-term effects of a very-low-carbohydrate weight loss diet compared with an isocaloric low-fat diet after 12 mo. Brinkworth GD, Noakes M, Buckley JD, Keogh JB, Clifton PM. Am J Clin Nutr. 2009 May 13. [Epub ahead of print] PMID: 19439458 doi:10.3945/ajcn.2008.27326

Conclusion: Vitamin D3 at doses equivalent to 2000 IU/d for 1 yr is safe in adolescents and results in desirable vitamin D levels. Short- and long-term safety of weekly high-dose vitamin D3 supplementation in school children. Maalouf J, Nabulsi M, Vieth R, Kimball S, El-Rassi R, Mahfoud Z, El-Hajj Fuleihan G. J Clin Endocrinol Metab. 2008 Jul;93(7):2693-701. Epub 2008 Apr 29. PMID: 18445674 doi:10.1210/jc.2007-2530

CONCLUSION: Our results indicate that n-3 PUFA from seal oils is safe and efficacious for patients with NAFLD associated with hyperlipidemia and can improve their total symptom scores, ALT, serum lipid levels and normalization of ultrasonographic evidence. Further study is needed to confirm these results. Effects of n-3 polyunsaturated fatty acids from seal oils on nonalcoholic fatty liver disease associated with hyperlipidemia. Zhu FS, Liu S, Chen XM, Huang ZG, Zhang DW. World J Gastroenterol. 2008 Nov 7;14(41):6395-400. PMID: 19009658

Conclusion A low-carbohydrate plant-based diet has lipid-lowering advantages over a high-carbohydrate, low-fat weight-loss diet in improving heart disease risk factors not seen with conventional low-fat diets with animal products. The Effect of a Plant-Based Low-Carbohydrate ("Eco-Atkins") Diet on Body Weight and Blood Lipid Concentrations in Hyperlipidemic Subjects David J. A. Jenkins; Julia M. W. Wong; Cyril W. C. Kendall; Amin Esfahani; Vivian W. Y. Ng; Tracy C. K. Leong; Dorothea A. Faulkner; Ed Vidgen; Kathryn A. Greaves; Gregory Paul; William Singer Arch Intern Med. 2009;169(11):1046-1054. DOI: 10.1001/archinternmed.2009.115

High-dose oral vitamin D3 supplementation in the elderly. Bacon CJ, Gamble GD, Horne AM, Scott MA, Reid IR. Osteoporos Int. 2009 Aug;20(8):1407-15. Epub 2008 Dec 20. PMID: 19101755 Sixty-three elderly participants were randomized to three regimens of vitamin D supplementation: a 500,000-IU loading dose; the loading dose plus 50,000 IU/month; or 50,000 IU/month. CONCLUSIONS: Large loading doses of vitamin D(3) rapidly and safely normalize 25OHD levels in the frail elderly. Monthly dosing is similarly effective and safe, but takes 3-5 months for plateau 25OHD levels to be reached.

An isoenergetic very low carbohydrate diet improves serum HDL cholesterol and triacylglycerol concentrations, the total cholesterol to HDL cholesterol ratio and postprandial pipemic responses compared with a low fat diet in normal weight, normolipidemic women. Volek JS, Sharman MJ, Gómez AL, Scheett TP, Kraemer WJ. J Nutr. 2003 Sep;133(9):2756-61. PMID: 12949361