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Foods Eaten Tracking Chart
It would be interesting to see a bar or pie chart of foods eaten i.e. how many servings of eggs, beef, fish during a day/week/month/year. It might also be something that could be volunteered for nutrional studies as an opt in type thing.
It might not be 100% scientific, but it would be better than a nutritional study questionaire asking 'how many times you ate' something being answered from memory.