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Antioxidant support; Immune system support; Respiratory wellness
Adults with busy lifestyles seeking daily antioxidant and immune system support or those with limited sun exposure.
Take 2 tablets once daily, preferably with food to support absorption and minimize stomach upset.
Gluten Free; Vegetarian; Free from synthetic colors and preservatives; Free from milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy, and sesame.
Vitamin C functions as a water-soluble antioxidant and cofactor for enzymes involved in immune cell function and collagen formation.
Caution: High doses may cause digestive discomfort in some people; take with food if sensitive.
Vitamin D3 binds to vitamin D receptors to influence gene expression involved in immune cell activity and calcium balance.
Caution: High potency; consider total vitamin D intake from all sources to avoid excessive levels.
Zinc supports normal development and signaling of immune cells and serves as a cofactor for antioxidant enzymes.
Caution: Zinc may cause nausea on an empty stomach and long-term high intake may affect copper balance.
NAC provides cysteine to support glutathione production, a key intracellular antioxidant involved in cellular defense.
Caution: May cause mild gastrointestinal upset; avoid combining with other supplements that thin mucus unless advised.
Selenium is a cofactor for glutathione peroxidases that help neutralize reactive oxygen species.
Caution: High intake over time may lead to unwanted effects; consider total selenium from diet and supplements.
Vitamin C and NAC both feed antioxidant defenses, with NAC supporting glutathione production and vitamin C recycling antioxidants in fluids. Vitamin D3 helps regulate immune cell signaling, while zinc and selenium act as enzyme cofactors that participate in antioxidant and immune processes.
Who should be cautious: Contains vitamin D at 5000 IU per serving, which is above the typical daily intake; people monitoring vitamin D or blood calcium may want to discuss with a healthcare provider. People with thyroid conditions or on anticoagulants may wish to review high-dose selenium and vitamin K status with a clinician. Those with zinc-sensitive stomachs may prefer to take with food. If you take medications that may interact with high-dose vitamin D, consult a healthcare provider before use.
Storage: Keep tightly closed in a cool, dry place. Keep out of reach of children.
Many users mention feeling healthier and more energetic after consistent use.
Reviewers often credit the vitamin and NAC blend with supporting easy breathing and daily resilience.
Some find the tablets big and note an unpleasant odor, making them harder to swallow.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
Vitamin C may enhance antioxidant defenses, supporting overall health and vitality. It works synergistically with other antioxidants to neutralize free radicals, promoting cellular health.
AI generated. Not medical advice.
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Strengthen and nourish your natural immune protection with the power of NaturesPlus® Immune Boost! Uniquely formulated delivering 6 key nutrients to support respiratory and overall immune system health. NaturesPlus Immune Boost provides robust immune support with high-potency vitamins and minerals along with N-Acetyl-Cysteine. These nutrients promote production of the powerful immune-support antioxidant enzyme, Glutathione.*
Can be taken with other NaturesPlus Immune Formulas.
As a dietary supplement, take two tablets daily.
Microcrystalline cellulose, rice protein, vegetable cellulose, stearic acid, silica, pharmaceutical glaze.
Free from synthetic: colors, preservatives. Free from milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy and sesame.
Keep tightly closed in a cool, dry place.
Keep out of reach of children.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 2 Tablets | ||
| Servings Per Container: 30 | ||
| Amount Per Serving | %Daily Value | |
| Vitamin A (as beta carotene)(3000 IU) | 900 mcg RAE | 100% |
| Vitamin C (as ascorbic acid) | 1000 mg | 1111% |
| Vitamin D (as cholecalciferol [vegan D3])(5000 IU) | 125 mcg | 625% |
| Zinc (from zinc gluconate) | 30 mg | 273% |
| Selenium (as selenomethionine) | 200 mcg | 364% |
| N-Acetyl-Cysteine | 600 mg | † |
| †Daily Value not established. | ||
