Look for evidence-backed ingredients like vitamin D, zinc, vitamin C, elderberry, and medicinal mushrooms in immune support supplements, prioritizing bioavailable forms and third-party testing.
Essential Ingredients
Selection Tips
Avoid mega-doses or unproven herbs (e.g., echinacea inconsistent); seek USP/NSF seals for purity, especially for your nutraceutical brand standards.
Synergies like vitamin C + zinc amplify effects; tailor to gaps (e.g., vitamin D for Indian urban deficiency).
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