For most healthy adults, common guidelines suggest about 250–500 mg per day of combined EPA and DHA (the main marine omega‑3s), either from fish or supplements, plus about 1.1 g/day of ALA for women and 1.6 g/day for men from plant sources like flax or chia seeds. Higher doses are sometimes used for specific conditions (for example around 1,000 mg/day of EPA+DHA for heart disease, or up to 3–4 g/day under medical supervision for high triglycerides), so checking with a clinician before going above ~1 g/day from supplements is important.

Key daily targets

  • General health (most adults)
    • 250–500 mg/day combined EPA + DHA from fish or supplements.
* 1.1 g/day ALA (women) and 1.6 g/day ALA (men) from foods like flaxseed, chia, walnuts, and canola oil.
  • Heart health / coronary disease
    • Many guidelines suggest about 1 g/day EPA + DHA, preferably from fatty fish; supplements are often used if diet is low in fish.
  • High triglycerides (under doctor care)
    • Prescription‑strength omega‑3 products are commonly used in doses around 4 g/day EPA + DHA, which should only be done with medical supervision because of bleeding‑risk and interaction concerns.
  • Pregnancy and breastfeeding
    • Usual adult intake (250–500 mg/day EPA + DHA) plus an extra 200–300 mg/day of DHA is often recommended to support fetal and infant brain development.

How that looks in food or pills

  • Fatty fish (salmon, sardines, mackerel) 2–3 times per week typically gives you around 250–500 mg/day on average of EPA + DHA.
  • Many standard fish‑oil capsules contain about 300 mg EPA + DHA each, so:
    • 1–2 capsules per day often lands in the general‑health range.
    • More than 3–4 capsules per day should be discussed with a clinician, especially if you take blood thinners or have bleeding risks.

Safety limits and when to be careful

  • Intakes up to about 3–5 g/day of EPA + DHA from supplements are generally considered the upper safe range for adults, but doses near this level should be supervised.
  • Possible issues at higher doses include:
    • Increased bleeding tendency or bruising
    • Upset stomach, fishy aftertaste, or reflux
    • Interactions with blood‑thinning or blood‑pressure medications

Simple starting plan

  • If you are generally healthy and not on blood thinners:
    • Aim for 2 servings of fatty fish per week plus 1 basic fish‑oil capsule daily (around 300–500 mg EPA + DHA) or equivalent algae‑based omega‑3 if you are vegetarian/vegan.
  • If you have heart disease, very high triglycerides, are pregnant, or are on medications affecting clotting or blood pressure, discuss your current diet and any supplement label with a healthcare professional before choosing a dose.