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Study links four to six daily whole grain servings to improved heart health

ScienceDaily reports that a meta-analysis of 87 clinical trials found optimal cardiovascular benefits at 60 to 100 grams daily.

Updated Sep 16, 2026 · 15:57 UTC1 reports

The short version

  • A systematic review of 87 clinical trials suggests that eating four to six daily servings of whole grains improves key cardiovascular risk factors.[ScienceDaily]
  • The analysis found initial health benefits at 30 to 40 grams per day, with maximum effects observed at 60 to 100 grams daily.[ScienceDaily]
  • Because most trials averaged eight weeks and measured risk factors rather than direct events, researchers state longer-term studies are required.[ScienceDaily]

Key facts

  • The analysis compiled 87 clinical trials involving over 6,500 participants globally.[ScienceDaily]
  • The study was led by Dr. Helda Tutunchi from Tabriz University of Medical Sciences.[ScienceDaily]
  • The strongest improvements in heart health risk factors occurred between 60 and 100 grams of dry-weight whole grains daily.[ScienceDaily]

What remains uncertain

  • The long-term effects of high whole-grain consumption on actual cardiovascular events remain unconfirmed due to short trial durations.[ScienceDaily]
  • The physiological impact of very high intakes exceeding 140 grams per day remains uncertain due to few evaluated studies.[ScienceDaily]

Sources

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.