NutriStack
Symptom·Immune·Reviewed May 30, 2026
Supplements for Frequent illness / weak immunity.
When frequent illness / weak immunity is the complaint, these are the supplements most often associated with it in the NutriStack library, ranked by how directly each one targets it and by the strength of the evidence.
Ranked by relevance, top first.
Relevance reflects how directly each supplement targets this symptom in the NutriStack map. Evidence is the supplement’s own rating. Open any name for the full profile.
- 01Vitamin D3Moderate84% match
Vitamin D supports innate and adaptive immune regulation, especially when status is low.
SuggestedD3 (cholecalciferol) - 02ZincStrong82% match
Zinc is central to immune-cell function and mucosal defense.
SuggestedZinc picolinate or acetate lozenges - 03Vitamin CModerate72% match
Vitamin C supports leukocyte function and oxidative stress handling during illness.
SuggestedAscorbic acid or liposomal vitamin C - 04ElderberryLimited58% match
Elderberry is used for upper-respiratory immune support, though evidence quality is mixed.
SuggestedElderberry extract or syrup - 05ProbioticsModerate58% match
Gut microbes influence immune signaling and barrier function.
SuggestedMulti-strain probiotic - 06NACModerate56% match
NAC supports glutathione production and can help reduce thick mucus during respiratory stress.
SuggestedStandard NAC
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Every match traces to a full profile.
These rankings come from the same library that powers the NutriStack app. Open any supplement for full dosing, forms, interactions, and citations.