Best (free) data for nutritional modelling of recipes?

Hi all,

I'm making a simple spreadsheet to help model recipe nutritional profiles (ingredients and the impact on nutritional values in the finished food), and I'm looking for data sources.

I've been taking data from the FDA fooddata website, but there seems to be inconsistency between types of data available and the values for numerous ingredients.

I don't intend to make FDA compliant nutritional facts label from this, just prototyping recipes and thinking about the impact of different ingredients.

I can live with it, but I was wondering if this is the best free source?

Thanks!