[MrEfficiency]

Recently my website was criticized for using the data on the food package rather than USDA data.

I'm unsure what the 'correct answer' is, given they were off by 25% which is significant.

I could add javascript so the user could decide which reporting method they would like to see, but I'm considering that this is massive overkill with limited benefit for the customer.

I doubt my conclusions are impacted as despite this huge difference, top 10 items usually stay around the top 10.

Any thoughts on how to make the data the most trustworthy and accurate?

[throwaway080383]

Doesn't have to be fancy JavaScript. Even an asterisk next to disputed items and a link to the "Alternative Nutrition Facts" would be helpful.

[MrEfficiency]

Ive been thinking about this since the morning.

I believe a link to the alternative calculation is probably going to be my solution.

[forapurpose]

Is there any information available about why the two sources differ so much? For example, is the USDA data not updated frequently?