| Measure | Value |
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A simplified teaching model for a healthy adult. DRI values are adult RDAs (men where they differ); cooking losses and absorption shares are rounded teaching values that vary with food, time and person. Symptoms appear only if an intake stays in that zone for weeks to months (years for B12). Not for personal medical or diet decisions.
| Measure | Value |
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A simplified teaching model. Real red cells live about 120 days, so blood values change over weeks; time here runs about 2 weeks per second. Hemoglobin and MCV values are rounded. Nerve damage from B12 deficiency develops slowly and may not fully reverse.
The picture updates with the answer you type. The worked solution builds step by step; units that cancel are struck out in red.
Your job
Drag a card onto a box, or tap a card and then tap the box's name. Cards are buttons, so Tab and Enter work too.
Fictional people and rounded teaching values. For learning only, not personal medical or diet advice.
Wrong picks are fine here. Each one tells you why.