Table 1 : Inputs to Vitamin D consumption model.

  Year
Measure Units 1980 1985 1990 1995 2000 2005 2010

% of babies who are ever breast-fed % 55% 60% 53% 60% 71% 74% 77%
% of babies who are breast-fed at 6 mos % 19% 20% 18% 22% 34% 43% 49%
% of babies who are breast-fed at 12 mos % 9% 10% 8% 10% 16% 22% 27%
% of breast-fed babies given D drops % 0% 0% 0% 0% 0% 11% 16%
Age starting D drops months -- -- -- -- 2 2 0
Age in months of typical transition to milk months 8 9 10 11 12 12 12
Human milk consumption by breast-fed Ml 600 600 600 600 600 600 600
Formula consumption by formula-fed Ml 600 600 600 600 600 600 600
Milk consumption by toddlers Ml 500 500 500 500 500 500 500
Vitamin D per liter in human milk IU 45 45 45 45 45 45 45
Vitamin D per liter in formula IU 400 586 772 713 654 595 536
Vitamin D per liter in whole milk IU 200 200 200 320 439 483 526
Vitamin D per liter in 2% milk IU 271 271 271 331 391 446 500
Vitamin D per vitamin D drop IU 400 400 400 400 400 400 400
Vitamin D in kids multivitamins IU 400 400 400 400 400 400 400
Vitamin D from diet without fortification IU 18 18 18 18 18 18 18
% of toddlers receiving vitamins % 11% 11% 18% 26% 33% 39% 45%
Vitamin D from other fortified foods IU 21 21 21 21 31 51 71

Seth Bittker Journal of Autism  2015 2:1DOI : 10.7243/2054-992X-2-1