Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Sea vegetables, a group that includes various edible seaweeds such as kelp, nori, wakame, and dulse, have a long history of use in traditional diets, particularly in East Asia. Their use to support heart health stems from their rich content of minerals (notably iodine, magnesium, calcium, and potassium), fiber, and certain antioxidants. In traditional systems, especially in Japanese and Korean diets, sea vegetables are believed to promote general vitality and may be associated with cardiovascular wellness due to their nutrient density and potential to help regulate blood pressure and cholesterol.

However, while these traditional beliefs exist, direct historical references specifically linking sea vegetables to the treatment of "heart weakness" are sparse. Most traditional use is general and not specific to cardiac insufficiency. Modern scientific studies on sea vegetables point to potential cardiovascular benefits, such as cholesterol-lowering effects and blood pressure regulation, but these are based on limited, mostly observational or animal studies, and do not constitute robust clinical evidence. No major clinical guidelines recommend sea vegetables as a treatment for heart weakness or heart failure. Therefore, while there is a tradition of use for general health and possible heart health support, the evidence is not strong or specific enough to rate higher than a 2 on the scale.

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