What affects folate status?

Food preparation:

The vitamin is easily lost when foods are:
1. stored for too long: after 3 days most of it is gone
2. stored too warm temperature: folic acid is sensitive to heat.
3. stored in a light place
4. overcooked or reheated: a lengthy cooking easily oxidizes foods rich in folates. Up to 50% of folic acid in foods may be lost in processing and cooking.
  Always cover vegetable airtight, store them in a cool dark place and eat them as soon as possible.
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