Vitamin D

Vitamin D3 in Portugal: D3, D3 + K2, Spray and Cod Liver Oil Supplements

Vitamin D: the essentials. Vitamin D is produced in the skin through sun exposure and occurs in few foods, such as oily fish and eggs. In this collection you will find vitamin D3 (cholecalciferol) from NOW Foods, Osavi, OstroVit and Life Extension, on its own or combined with vitamin K2 (MK-7), as well as cod liver oil and A-D-E-K formulas.

Authorised claims. Vitamin D contributes to normal absorption and utilisation of calcium and phosphorus, to normal blood calcium levels, to the maintenance of normal bones and teeth, to the maintenance of normal muscle function and to the normal function of the immune system. These claims apply to products providing at least 15% of the nutrient reference value (NRV) per daily dose.

Vitamin D3 with K2. Many products combine D3 and K2. Vitamin K contributes to the maintenance of normal bones and to normal blood clotting. If you take anticoagulants, consult your doctor before taking supplements containing vitamin K.

IU, micrograms and upper levels. 1 mcg of vitamin D equals 40 IU and the NRV is 5 mcg (200 IU). So 2000 IU is 50 mcg (1000% NRV) and 4000 IU is 100 mcg, the tolerable upper intake level set by EFSA for adults. 5000 IU products (125 mcg) exceed that level and should only be used under medical supervision. Do not combine several vitamin D products without adding up the doses.

Formats for everyone. Choose between softgels, tablets, chewable lozenges, oral spray and liquid oil. Cod liver oil also provides omega-3 and vitamin A — keep your total vitamin A in mind if you take other supplements. See also omega-3 and oils and magnesium.

Frequently asked questions

When should I take vitamin D? Vitamin D is fat-soluble, so it is usually taken with a meal containing some fat, as directed by the manufacturer.

Where can I buy vitamin D3 in Portugal? From the Nutri9 online shop, with delivery across Portugal, or at our physical shop in Malveira. See all vitamins.