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Question
Posted by: PK | 2005/11/24

Calcium

Hi Dietdoc,

Thanks for a great forum!!

I eat about 175ml fat free yoghurt, and a cup of milk - or just 2 x 175ml yoghurt / visa versa - IS it necessary to take a calcium supplement?

(25 yr old female).

Thank you

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Our expert says:
Expert ImageDietDoc

Dear PK
The RDA for calcium for adult women is at least 100 mg a day. Milk contains about 1 mg of calcium per ml, thus is you have 2 x 250 ml cups = 500 ml and 500 mg of calcium. Fat-free yoghurt on the other hand contains nearly 2 mg of calcium per ml, so if you have 175 ml of yoghurt you should be ingesting 350 mg (175 ml) or 700 mg (350 ml) of calcium when you eat the yoghurt. In both cases you still need between 300 and 500 mg of calcium a day from other sources, so it may be a good idea to take a calcium supplement containing about 300 mg a day to ensure that you get 1000 mg of calcium a day.
Best regards
DietDoc

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