1) Milk - Yes, it's often fortified with vitamin D, providing about 20% of the Recommended Dietary Allowance (RDA).
2) Eggs - Yes, they contain a small amount of vitamin D, around 10% of the RDA.
3) Salmon - Yes, it's a great source of vitamin D, providing well over 100% of the RDA.
4) Spinach - No, spinach is not a significant source of vitamin D.
So, the foods that provide at least 20% of the RDA of vitamin D are milk, eggs, and salmon.
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