Supplements1 mentions

Spirulina

2 grams; can reduce rhinitis/nasal obstruction, improve smell, improve sleep, reduce inflammatory cytokines, and reduce nasal itching. Caution for people with PKU/phenylalanine sensitivity.

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“Both cases saw significant decreases in nasal obstruction, improved ability to smell, improved sleep... reduction in nasal itching... after taking two grams, two grams, not milligrams, but two grams.”

huberman · Using Your Nervous System to Enhance Your Immune System · Nov 1, 2021 · 1:45:28 · open ↗

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