Protect Immunity Supplement.

The gap this formula speaks to.

Public health figures the engine matched to this formula's ingredients. Reported by their source, cited and dated, never written by the brand.

Population figures from public health data. Context for the category, not a statement about any individual and not a claim about this product.

Every one of these is a fact the engine could ground.

Each line below was derived from this formula's own record at the time of verification. Nothing here was written by the brand, and nothing can be added that the evidence does not carry.

• Studied in people22 human studies on Zinc back this formula, each one cited.
• A mechanism that is settledHow Vitamin C and Zinc work is settled pharmacology.
• Studied together, not just separatelyVitamin C and Zinc have been studied together, not only separately.
• Recent work on the recordThe most recent study on this record was published in 2025.
• Serving amount inside the studied rangeEach serving carries 11 mg of Zinc, inside the range the published research used.
• A stated daily maintenance amountZinc is here at a daily maintenance amount, which is what a daily supplement is for.
• Why this formatIt is a capsule, so the amount per serving is fixed and travels without measuring.
• Full label disclosureEvery ingredient on this label carries its own declared amount.
• Where it comes from and how it is madeVitamin C is made by fermentation.
• Positions this formula already qualifies forThis formula already qualifies for positions beyond the one it is sold into, on the evidence it carries.
• A position nobody is holding yetSome of those positions are ones almost nobody is selling to yet.
• Interaction screen on the recordEvery active on this label was screened against the interaction record, and the screen is published with it.

What the trials show about timing.

Time-to-effect windows the engine read from the trial record. Each is a window a named study measured, cited and dated, never written by the brand.

• Vitamin Cwithin 24 hours of a single doseMeasured within a day

  In a randomised crossover trial, 12 healthy adults consumed 101.7 mg of vitamin C as a powder, as raw fruits and vegetables, or as juice, and plasma vitamin C rose after every intake form, with plasma and urinary levels tracked over the 24 hours following the single dose.

  Choi et al., 2025 (Nutrients)PMID 41228404

  Strong
• Zincover about five days of lozenges started within 24 hours of symptom onsetBuilds with daily use

  Across three randomised placebo-controlled trials pooled as individual patient data (199 adults with naturally acquired colds, 80 to 92 mg of elemental zinc a day as acetate lozenges), 70 percent of the zinc group had recovered by day 5 against 27 percent on placebo, and colds ran 2.73 days shorter against a 7 day average duration. A separate meta-analysis of seven lozenge trials (575 participants, doses above 75 mg a day, zinc acetate or zinc gluconate) measured cold duration 33 percent shorter, with no significant difference between the two salts.

  Hemilä et al., 2017 (Open Forum Infect Dis)PMID 28480298

  Hemilä et al., 2016 (Br J Clin Pharmacol)PMID 27378206

  Hemilä, 2017 (JRSM Open)PMID 28515951

  Strong
• Zincabout two to four weeks of daily intakeBuilds with daily use

  In a controlled feeding study in nine healthy men, six weeks of restricted zinc intake raised DNA strand breaks in peripheral blood cells, and four weeks of repletion at 11 mg a day, with 20 mg of supplemental zinc for the first seven days, reversed the rise. In a separate randomised placebo-controlled trial in 40 Ethiopian women eating a high-phytate diet, 20 mg a day of zinc sulfate for 17 days lowered mean comet tail moment from 39.7 to 30.0 while plasma zinc did not change significantly. Both windows were measured on a DNA damage marker in blood cells, not on a symptom.

  Song and colleagues 2009, American Journal of Clinical NutritionPMID 19515738

  Joray and colleagues 2015, Nutrition ResearchPMID 25491347

  Early
• Elderberry Fruit Powderwithin about 7 hours of a single doseMeasured within a day

  In a kinetic study, 6 healthy volunteers took a single 30 ml oral dose of elderberry extract providing 147.3 mg of anthocyanins. The anthocyanins appeared in plasma and were excreted in urine within 7 hours, with a plasma half-life of about 1.74 hours.

  Bitsch et al., 2004 (International journal of clinical pharmacology and therapeutics)PMID 15176653

  Strong
• Elderberry Fruit Powderabout 1 week of twice-daily useBuilds with daily use

  In a randomised crossover trial, adults with overweight consumed anthocyanin-rich elderberry juice twice daily for 1 week. After that week, gut microbiota composition had shifted, post-meal blood glucose was lower and fat oxidation was higher than after placebo.

  Teets et al., 2024 (Nutrients)PMID 39458549

  Early

Windows measured in the cited trials. Context for how the active behaves over time, not a statement about any individual and not a claim about this product.

How each ingredient usually behaves over time.

Five ingredients, from each one's own page.

• Vitamin CWithin hours

  Blood levels rise within hours and tissue pools fill over days. Collagen-linked changes in skin and gums build over weeks and show as tissue quality, not as a sensation.

  Its own page, the plain answer on timing ↗

• ZincWithin days

  Blood zinc moves within days. The parts you would notice, skin behaviour and immune resilience, take four to twelve weeks of steady daily intake.

  Its own page, the plain answer on timing ↗

• Larch Extract

  Gas and stool changes turn up in the first few days. The shift in the bacteria it feeds builds across two to four weeks of daily use.

  Its own page, the plain answer on timing ↗

• Elderberry Fruit Powder

  It moves on a scale of days, not minutes. Studies that started daily use at the first sign of a sniffle followed the difference over the next two to four days.

  Its own page, the plain answer on timing ↗

• Yeast Beta GlucanAbout one to two weeks

  Immune priming builds across one to two weeks of daily use. The change shows up in immune cell activity measures rather than in anything you feel.

  Its own page, the plain answer on timing ↗

How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.

Capsule

It is a capsule, so the amount per serving is fixed and travels without measuring.

Because the effect builds and holds only with continued daily use, a steady recurring supply is the practical way to keep it going.