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 amount you need There is no established Adequate Intake (AI) or Dietary Reference Intake (DRI) in the United States for EPA and DHA omega-3s. A growing number of expert bodies and health professionals recommend 250 milligrams (mg) to 1,000 mg of EPA and DHA per day.