Nutrients with a real role.
Vitamin C and zinc contribute to normal immune function. They are useful nutritional building blocks, especially when your diet does not cover your needs.
VITAMIN C + ZINC
Astral SupplementsAstral
Immunity Booster Blend
$34.99
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AT A GLANCE
- Vitamin C and zinc contribute to normal immune function.
- Elderberry, echinacea, turmeric and garlic broaden the blend beyond the essentials.
- Two capsules per serving, with 30 servings in each bottle.
Inside the formula
Vitamin C, zinc, elderberry, echinacea, garlic and turmeric. Read the label for the full ingredient list.
Make it part of your day
Two capsules make one serving. Follow the label directions and check the full ingredient list if you have sensitivities.
Shipping & returns
Shipping methods and charges are shown at checkout. Read our shipping policy and returns policy.
CARE FOR THE EVERYDAY
Start with your foundations.
Give your daily routine a place for vitamin C, zinc and selected botanicals. Two capsules, one simple habit.
✦ Vitamin C + zinc✦ Elderberry✦ 30 servings
Make it yours 
Taking care of yourself is part of living fully.
WHY IT BELONGS IN YOUR DAY
Support your everyday.
The essentials your body uses, a botanical blend you can explore and a format that fits your routine.
Explore the researchMore than a vitamin capsule.
Elderberry, echinacea, turmeric and garlic broaden the blend. A practical way to bring several familiar botanicals into your daily routine.
ELDERBERRY · ECHINACEA · TURMERICEasy to make part of your day.
Two capsules per serving and 30 servings per bottle. Pair them with the foundations you can control: food, sleep and movement.
TWO CAPSULES · 30 SERVINGSYOUR NEXT MOVE
Give your daily foundations a place.
Thirty servings to bring vitamin C, zinc and botanicals into your day.
RESEARCH, IN CONTEXT
Want to go deeper?
These human studies looked at specific ingredients. Read what researchers measured and how the studies were designed.
ONE STUDY, UP CLOSE312 travelers
An elderberry trial
In a randomized trial of 312 air travelers, researchers tracked respiratory symptom duration and severity with a specific elderberry extract. It did not test whether Astral prevents illness.
Read on PubMed ↗0102030405
Zinc and immune cells
In 31 older adults with low zinc levels, a three-month trial found higher zinc status and T-cell measures with 30 mg daily versus a lower-dose control.
Effect of zinc supplementation on serum zinc concentration and T cell proliferation in nursing home elderly: a randomized, double-blind, placebo-controlled trial.
Vitamin C over time
A five-year trial comparing 500 mg with 50 mg daily found fewer colds in the higher-dose group, but no clear difference in how long or severe they were.
Effect of vitamin C on common cold: randomized controlled trial.
Echinacea across one season
A four-month trial of a fresh-plant echinacea extract reported fewer cold episodes and days versus placebo; extract preparations vary.
Safety and Efficacy Profile of Echinacea purpurea to Prevent Common Cold Episodes: A Randomized, Double-Blind, Placebo-Controlled Trial.
Garlic in a small study
In a 12-week trial with 146 people, an allicin-containing supplement was linked to fewer self-reported colds versus placebo; evidence is limited.
Preventing the common cold with a garlic supplement: a double-blind, placebo-controlled survey.
Curcumin, a turmeric compound
A 12-week trial in 99 adults examined cold-symptom days with two specially formulated curcumin extracts; those differ from the turmeric in this blend.
Effects of Highly Bioavailable Curcumin Supplementation on Common Cold Symptoms and Immune and Inflammatory Functions in Healthy Japanese Subjects: A Randomized Controlled Study.
These studies tested specific ingredients, extracts and doses; they did not evaluate the finished Astral product. Individual results may vary.