Do quality adjectives have a standard? So some cheese products I buy have nutritional information on the outside that say things like "Good source of Calcium", or "Excellent source of Calcium", or "Great source of Calcium".

Are these just buzzwords, or is there a standard for these words (ie, Excellent = ^20% calcium, Great = ^10% Calcium, Good = ^5% Calcium)?
From Googling Nutritional Claims Excellent:

YES! These terms are highly regulated in the United States.

In the US, the FDA sets the following standards for food products:


  
  "High," "Rich In," or "Excellent Source Of" - Contains 20% or more of the DV per RACC. May be used on meals or main dishes to indicate that the product contains a food that meets the definition, but may not be used to describe the meal.
  "Good Source," "Contains," or "Provides" - 10%-19% of the DV per RACC. These terms may be used on meals or main dishes to indicate that the product contains a food that meets the definition but may not be used to describe the meal.
  "More," "Fortified," "Enriched," "Added," "Extra," or "Plus" - 10% or more of the DV per RACC than an appropriate reference food. May only be used for vitamins, minerals, protein, dietary fiber, and potassium.
  


Note: DV = Daily Value, RACC = Reference Amount Customarily Consumed

This is a really helpful page!