The extent of a focal tendon abnormality was intrasubstance in none (0%) of 16 patients with full-thickness tears, one (20%) of five patients with bursal surface partial-thickness tears, two (20%) of 10 patients with articular surface partial-thickness tears, and two (15%) of 13 patients with tendons without tear.
1 Adequate Intake (AI), where no RDA has been established, but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group.  Tolerable upper intake levels (UL), to caution against excessive intake of nutrients (like vitamin A) that can be harmful in large amounts.
The RDA represents an amount of a nutrient that will prevent a deficiency disorder of that individual nutrient (e.g., carbohydrate, protein) in practically all healthy people. The AMDR represents a balance of energy sources that appears to reduce the risk for chronic diseases such as heart disease, diabetes, etc. Food sources that provide carbohydrate, protein & fat also provide other essential nutrients.