Currently I take the one from physalis: https://www.hollandandbarrett.nl/shop/product/physalis-vitamine-d3-forte-60016558 https://www.hollandandbarrett.nl/shop/

Currently I take the one from physalis: https://www.hollandandbarrett.nl/shop/product/physalis-vitamine-d3-forte-60016558 https://www.hollandandbarrett.nl/shop/product/physalis-vitam... You can probably play around with the brands and doses a little. I think the important thing is to take gel capsules with oil inside and not solid pills. Vitamin D is fat-soluble so I think solid pills don't get absorbed very well.