NuMedica Seasonal Shield® - Seasonal Allergy & Immune Support

Description^*
NuMedica® Seasonal Shield® is an advanced, broad-spectrum nutritional formula designed to support your body's natural defenses during times of seasonal environmental challenges.* Featuring a synergistic blend of Vitamin C, Vitamin D3, Zinc, Quercetin, Bromelain, Nettle Extract, and N-Acetyl L-Cysteine (NAC), this formula helps maintain healthy immune function, support balanced histamine levels, and promote clear airways and normal mucus viscosity.*

Targeted Nutrients for Seasonal Support

The foundation of Seasonal Shield® rests on three key immune-supporting nutrients: Vitamin C, Vitamin D3, and Zinc. Together, they strengthen immune defenses, provide antioxidant protection, and support healthy inflammatory responses.*
- Vitamin C (200 mg) - Supports immune defense, combats oxidative stress, and promotes normal respiratory function.*
- Vitamin D3 (1,000 IU) - Plays a key role in immune regulation and helps maintain respiratory and bone health.*
- Zinc (25 mg) - An essential trace element that supports enzymatic activity and helps regulate immune responses.*
Powerful Phytonutrients and Enzymes

Seasonal Shield® goes beyond basic vitamins and minerals. It includes Quercetin, Bromelain, and Nettle Extract, a combination known to support balanced histamine levels and healthy mucus viscosity-two key factors in seasonal comfort.*
- Quercetin - A potent antioxidant that supports the body's normal inflammatory response.*
- Bromelain - A proteolytic enzyme from pineapple that enhances Quercetin's absorption and supports sinus comfort.*
- Nettle Extract - Traditionally used to support respiratory function and seasonal histamine balance.*
Additionally, N-Acetyl L-Cysteine (NAC) helps maintain healthy levels of glutathione (GSH)-the body's master antioxidant-further supporting respiratory and immune health.*

Why Choose Seasonal Shield®?

When the seasons change, environmental factors like pollen, mold, animal dander, and dust can trigger immune responses that lead to discomfort. Seasonal Shield® is formulated to address these challenges by supporting your body's natural defenses, promoting clear airways, and helping maintain comfort during seasonal transitions.* For additional strategies on managing seasonal changes, explore our article on Seasonal Allergies - Understanding and Managing Your Symptoms.

Comprehensive Seasonal Support

NuMedica Seasonal Shield® combines immune-supportive vitamins and minerals with botanicals and antioxidants to provide broad-spectrum seasonal defense.* Vitamin C, Vitamin D3, and Zinc help prime immune function, while Quercetin, Bromelain, Nettle Extract, and NAC support healthy histamine levels, mucus viscosity, and respiratory comfort.* This well-rounded formula is ideal for preparing your body before and during high-pollen seasons or other environmental challenges.
Features^*
Directions

Size: 120 Vegetable Capsules
Serving Size: 4 Capsules
Servings Per Container: 30

Directions: Take four capsules once per day or as directed by your healthcare practitioner.

Ingredients

Four Capsules Contain:
Nutrient/Ingredient	Amount	% Daily ValueDV ¹
Vitamin C (as ascorbic acid) Vitamin C Vitamin C is a powerful antioxidant that supports immune health, collagen synthesis, and iron absorption. View Supplements Using: Vitamin C	200 mg
Vitamin D₃ (as cholecalciferol) (1,000 IU) Vitamin D₃ Vitamin D3 is the bioactive form of vitamin D that enhances calcium absorption and bone health. View Supplements Using: Vitamin D₃	25 mcg
Zinc (as zinc methionate) Zinc Zinc is a trace mineral that supports immune function, wound healing, and DNA synthesis. View Supplements Using: Zinc	25 mg
Quercetin Dihydrate Quercetin Quercetin is a flavonoid that supports immune health, histamine response, and antioxidant defense. View Supplements Using: Quercetin	500 mg
Boswellia Extract (Boswellia serrata) (resin) (65% boswellic acids) Boswellia Extract Boswellia Extract, also known as Indian frankincense, supports joint comfort and inflammatory balance, especially in musculoskeletal conditions. View Supplements Using: Boswellia Extract	300 mg
Nettle Leaf Extract (Urtica dioica) (root) extract Nettle Leaf Extract Urtica dioica has traditionally been used in the control of cardiovascular disorders especially hypertension. The leaf extract of Urtica dioica has been reported to improve glucose homeostasis in vivo. Nettle root could prevent some of the effects of prostatic hyperplasia. https://pubmed.ncbi.nlm.nih.gov/31163183/	300 mg
N-Acetyl L-Cysteine N-Acetyl L-Cysteine N-Acetyl L-Cysteine supports antioxidant defense, detoxification, and lung health by replenishing intracellular glutathione. View Supplements Using: N-Acetyl L-Cysteine	250 mg
Lemon Fruit Extract (Citrus x limon) (90% bioflavonoids) Lemon Fruit Extract Lemons, limes, grapefruits, and oranges are high in phytonutrients, such as carotenoids, flavonoids, and polyphenols. These nutrients are types of antioxidants and give the fruits their bright colors and strong scents. They can also help protect your body and prevent many health issues. https://www.webmd.com/diet/health-benefits-citrus-fruits#1	222 mg
Bromelain (2400 GDU/g) Bromelain Bromelain is a proteolytic enzyme from pineapple that supports digestion, inflammation modulation, and tissue recovery. View Supplements Using: Bromelain	200 mg
Grape Seed Extract (Vitis vinifera) (95% proanthocyanidins) Grape Seed Extract Grape Seed Extract is rich in proanthocyanidins, antioxidants that support cardiovascular health, circulation, and protection from oxidative stress. View Supplements Using: Grape Seed Extract	20 mg
Betaine (as betaine hydrochloride) Betaine Betaine is a nutrient found in beets that supports liver function, methylation processes, and homocysteine balance. It also contributes to cellular hydration. View Supplements Using: Betaine	15 mg
¹ The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advise.

Questions^*

Questions

If you have a question not answered on this page, please consider submitting it in the Product Questions or Feedback section in the Discussion Forum below.

What is NuMedica Seasonal Shield® used for?

Seasonal Shield® is designed to support the body's natural defenses during seasonal environmental changes. It combines vitamins, minerals, and phytonutrients that work synergistically to promote immune balance, clear airways, and histamine support when pollen, mold, or other irritants are at their peak.*

How is Seasonal Shield® different from a typical allergy supplement?

Unlike many over-the-counter allergy products that focus only on symptom relief, Seasonal Shield® provides a comprehensive nutritional foundation. It includes Vitamin C, Vitamin D3, and Zinc for immune support, plus Quercetin, Bromelain, Nettle Extract, and NAC to promote healthy histamine levels, mucus viscosity, and respiratory comfort.*

Can I use Seasonal Shield® with other immune support supplements?

Seasonal Shield® is formulated to stand alone as a broad-spectrum seasonal support formula, but many people use it alongside other targeted immune products for additional support. Always consult your healthcare practitioner when combining supplements, especially if you use prescription medications or have chronic health conditions.*

When should I start taking Seasonal Shield®?

For best results, begin taking Seasonal Shield® 2-4 weeks before the start of your typical allergy season. This gives your body time to build up nutrient levels and prepare its natural defenses. Daily use throughout the season supports consistent immune balance and respiratory comfort.*
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Why does that matter? Well, because you will need to take different measures when it comes to food allergy vs. sensitivity.

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Seasonal Allergies, Diet & Quality Supplements
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Great product!!

on June 4, 2025
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Seasonal shield is very effective against colds and sickness. I highly recommend it.

Quick and great price!

on February 16, 2025
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I'm so grateful for this company. Free shipping and a great price is what a momma needs these days. Thank you!

on August 31, 2024
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Helps ward off any illness

Seems to help

on May 20, 2024
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During high pollen season, taking this daily (2 twice a day) seems to reduce the allergy effects. No antihistamine feelings, just milder symptoms. I was without it for several days and noticed a difference. I'll take it through the season.

on October 26, 2023
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It works fantastic! Been using for a 3 years. Supplement also has the fastest shipping and always in stock for this product! This works better than any nasal spray or over the counter. More pleasant to take.

Seasonal shield

on February 24, 2022
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It was suggested to me a few years ago to take this because I was the sole caretaker of my husband. For two years I never had the first cold or sinus infection. After my husband passed in 2020 I ran out.and didn't take any for about a month and of course came down with a.respiratory infection..i got another bottle and have taken it faithfully since and have not had another.

Best Product

on October 11, 2021
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I only provide a review when something is either very good or very bad. In this case, I'm happy to give the most positive review possible. I was suffering with terrible sore throats and congestion. My doctor recommended I use Seasonal Shield. It helped immediately. I couldn't recommend this product more. Ordering from SupplementRelief.com was easy, and the price was in line with other suppliers. It came within days of my order (I was expect about a week).

Finally! Allergy relief!

on July 6, 2021
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Only thing that knocks out my allergies

on June 14, 2021
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I've been taking this supplement for several years. I feel great, and have only had one cold in over 5 years.

Allergies Completely Controlled!

on May 3, 2021
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Every spring I suffer with sinus headaches, itching eyes, runny nose, burning throat. I used to take steroid nasal spray, antihistamine and singulair with little improvement. Started Seasonal Shield on the advice of a integrative medicine NP friend and can't believe the results. All symptoms controlled and no RX's needed.