| Fish Oil (Omega-3) - Skin/Coat | B | Omega-3 supplementation had a mild, consistent benefit for the reduction of itch and improvement in skin disease. However, the primary benefit was a reduced dose of prescription medication, rather than efficacy as a standalone treatment. |
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| Omega3/Omega 6 combination | B | Combination omega 3/omega 6 supplementation demonstrated a mild improvement in itching and owner-assessed coat quality, though results were inconsistent. Benefits were predominantly observed when used as an adjunctive therapy with veterinarian prescribed medications.
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| Probiotics (skin) | C | Supplementation with probiotics may provide a mild benefit to dogs with dermatitis, though evidence is minimal and emerging. Evidence was most supportive for their use as an adjuvant therapy rather than as a standalone treatment. |
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