> In the UK doctors recommend no more than 1,000 IU/day during the winter months. You're mixing two pieces of advice: 1) everyone 'should consider' taking 400

> In the UK doctors recommend no more than 1,000 IU/day during the winter months. You're mixing two pieces of advice: 1) everyone 'should consider' taking 400IU daily over winter (under-4s year-round); 2) infants should not take more than 1,000IU daily (adults: 4,000IU) https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/ https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-... Of course, 4,000 daily is still only 28,000 weekly, not 50k, but GP is doing it on the basis of blood work & physician review; the NHS website certainly isn't intended to contradict that, it's generic advice in lieu of it.