Heart health evidence brief
Flaxseed provides fiber, alpha-linolenic acid, and lignans. People usually use it for cholesterol, bowel regularity, and broader heart-health support rather than direct training performance.
Ground flaxseed can modestly improve blood pressure and lipid markers, but it fits best as a food-fiber pattern rather than a capsule-style shortcut.
Hypertension RCT meta-analysis reported blood-pressure reductions, while lipid meta-analyses show modest LDL and total cholesterol improvements.
Studies often use ground flaxseed, flaxseed oil, or lignans; whole seeds may pass through undigested and oil does not provide the same fiber.
Effects are marker-level and diet-dependent. Start gradually because fiber can cause bloating or stool changes.
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