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    GlossaryAllergic Reactions (Allergies)

    immune system overreacts to harmless substances, causing symptoms

    An allergic reaction, also known as a hypersensitivity reaction, occurs when the immune system mistakenly identifies a harmless substance (allergen) as a threat and overreacts to it. This can lead to symptoms ranging from mild, such as itching and sneezing, to severe, such as anaphylaxis, which can be life-threatening. Common allergens include pollen, pet dander, certain foods, and insect stings.

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      community Low level chronic allergies and hair loss

      in Research/Science  6 upvotes 10 months ago
      Hair loss can be influenced by chronic low-level allergies, and treatments like fexofenadine or topical cetirizine may help with regrowth. The user avoids finasteride, dutasteride, and minoxidil, and has tried Regenera Activa and PRF sessions.

      community Zyrtec (Cetirizine) antihistamine for hair growth compared to Minoxidil NIH study

      in Minoxidil  35 upvotes 1 year ago
      The conversation discusses the potential of topical cetirizine (Zyrtec) for hair growth in comparison to minoxidil, noting cetirizine's ability to reduce prostaglandin D2, which inhibits hair growth. Users share mixed experiences with cetirizine for allergies and scalp health, and there's a mention of the risk of dementia with long-term antihistamine use.

      community Scalp care on procapil and procyanidin b2 hair serum

      in Female  2 upvotes 1 year ago
      User uses Indian hair serum with procapil and procyanidin b2, stopped minoxidil due to allergies. Seeks advice on hair wash techniques and products for shoulder-length hair and scalp care while using hair growth serums.