Here is some information that I found regarding Limu and allergies…
A study from Japan found that mice given fucoidan got relief from pulmonary inflammation, suggesting the protein’s use for treating allergies. Another study, conducted by the biomedical group Takara Shuzo Co., also in Japan, which has been conducting a number of fucoidan studies, found there was suppression of the production of Immunoglobulin (lgE), which is known to cause allergies such as hay fever and allergic rhinitis, in mice that orally ingested fucoidan.
Another Japanese study from the School of Allied Health Sciences, found that fucoidan augments type 1 T helper cell response in mice, a finding that may mean it could be useful as a treatment for allergic inflammation.
