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Grains & legumes — See the category page
Grains & legumes
Early researchA 16-week trial in Kenya. The porridge with amaranth carried 5.6 times the iron of the control. Neither hemoglobin nor iron status moved. In the same trial, a micronutrient powder giving far less iron did reduce anemia.

Grains & legumes
Early researchIn the 2025 menopause trial, symptom scores fell in all three groups. That sounds like good news until you see that all three groups ate cheonggukjang. Without a placebo arm, there is no way to separate the improvement from time and expectation.

Grains & legumes
A 12-week double-blind randomised trial found visceral fat fell — only in people carrying the T allele of PPAR-γ2. And in the same trial, insulin and HOMA-IR rose. Meanwhile, the biggest number on doenjang's label is sodium.

Grains & legumes
Early researchIn a 2026 network meta-analysis, replacing 500 mL of cow milk with soy drink lowered systolic pressure by 8.23 mmHg — about what a single blood-pressure tablet does. But the same paper's overall verdict is that "few differences were observed", and that number is graded low certainty.

Grains & legumes
Early researchThree years of MK-7 in 244 women slowed bone loss at the lumbar spine and femoral neck — but not at the total hip. One year of natto capsules in 334 women changed nothing anywhere.

Grains & legumes
Early researchRye products produced lower insulin responses than white wheat bread. Yet in the same trial, bread made from rye bran produced a higher insulin response than every other rye product — the opposite of what more fibre is supposed to do.