Interactions on record — worth a quick check against your medications. Based on 3 of 5 ingredients. Check your meds →
Dietary supplement

Myco Shield Throat Spray Winter Mist Ingredients & Drug Interactions

by Host Defense Mushrooms

Liquid Category: Botanical
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Myco Shield Throat Spray Winter Mist is a dietary supplement by Host Defense Mushrooms with 5 active ingredients. Its ingredients are commonly taken for immune support, antioxidant support, general wellness/tonic.Based on those ingredients, 501 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Reishi Mycelium Extract, Fresh, Chaga Mycelium Extract, Fresh, Birch Polypore Mycelium Extract, Fresh. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 5 active ingredients.
  • “Proprietary Extract Blend” is a proprietary blend — the label gives one combined amount (0.42 mL) without saying how much of each component you get.

Myco Shield contains 5 active ingredients, all fresh mushroom mycelium extracts: Agarikon, Chaga, Birch Polypore, Turkey Tail, and Reishi. These are the working parts of the formula.

The spray also holds inactive ingredients — water, alcohol, and sweet birch oil — that help deliver and preserve the extracts.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

The label doesn't state a purpose we can grade — see each ingredient's own graded uses on its monograph instead.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence for what this product does isn't established in the data we hold. Chaga, birch polypore, turkey tail, and reishi have all been studied for various conditions — heart health, diabetes, joint pain, and others — but the ratings in our records show insufficient reliable evidence for most of them.

Reishi is rated possibly ineffective for high cholesterol (hyperlipidemia). If you're considering this spray for a specific health goal, talk with your pharmacist or doctor about what the research actually shows for your situation.

The evidence, ingredient by ingredient Chaga Birch Reishi Mushroom

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 3 of the 3 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 3 of 3.
  • General safety write-ups exist for 3 of 3.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Chaga is generally used in foods and teas, but human safety data are limited. It contains high concentrations of oxalate, and there are rare reports of kidney problems with excessive use.

Reishi is generally well tolerated short-term, though long-term safety hasn't been well studied; common side effects include dizziness, dry mouth, itching, nausea, rash, and stomach upset. Some people report respiratory allergy to reishi spores.

Birch can trigger allergic reactions in people sensitive to birch pollen or birch bark. The safety data for all three main extracts advise against use during pregnancy and breastfeeding — there isn't enough information to know they're safe for you or your baby.

Side effects, ingredient by ingredient Chaga Birch Reishi Mushroom

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 3 of the 3 matched ingredients can interact with medications — Birch, Reishi Mushroom, Chaga.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 501 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before you start, double-check your blood thinners (anticoagulants and antiplatelet drugs like warfarin, aspirin, or clopidogrel), diabetes medications, blood pressure pills, immunosuppressants, and diuretics (water pills). Chaga and reishi carry Moderate-severity interactions with the first three categories; birch polypore carries a Minor interaction with diuretics.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This spray may be worth considering if you're interested in mushroom extracts and don't take blood thinners, diabetes drugs, blood pressure medications, or immune-suppressing drugs. If you do take any of those, check your specific medications first.

Talk with your pharmacist before you start, especially if you're pregnant, breastfeeding, or have kidney concerns.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 3 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 24, 2025.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Myco Shield Throat Spray Winter Mist, straight from the product label.

Brand Host Defense Mushrooms
Barcode (UPC) (633422261621)
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Jul 24, 2025
DSLD ID 335819
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Organic, Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
0.42 mL
Maximum serving Sizes:
0.42 mL
Servings per container
71
UPC/BARCODE
(633422261621)
IngredientAmount% DV
Proprietary Extract Blend0.42 mL--
Agarikon Mycelium Extract, Fresh0 NP--
Chaga Mycelium Extract, Fresh0 NP--
Birch Polypore Mycelium Extract, Fresh0 NP--
Turkey Tail Mycelium Extract, Fresh 0 NP--
Reishi Mycelium Extract, Fresh0 NP--

Other ingredients: Water, Alcohol, sweet Birch Oil

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Directions: Apply three pump sprays into mouth, then swallow, twice per day. Shake well before using. Can be taken with food, on an empty stomach, or as recommended by your healthcare professional.

Precautions

Do not inhale while spraying. Avoid contact with eyes.

Caution: If you have a medical condition, are taking medications, or are pregnant or breastfeeding, consult a healthcare professional before using this product.

Keep out of reach of children.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Seals/Symbols

USDA Organic Vegan Certified B Corporation

Certified organic Washington State Department of Agriculture Organic Program

Formulation

GF Gluten free Non GMO

Vegan

On-The-Go Immune support

Certified Organic by the WSDA

FDA Statement of Identity

Dietary Supplement

Formula

Superfood mushroom mycelium

See for yourself

Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size0.42 mL Dosage formLiquid Servings per container71 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Proprietary Extract Blend

0.42 mL per serving

Other (inactive) ingredients: Water, Alcohol, Sweet Birch Oil. These complete the product’s ingredient list but are not active constituents.

Interaction report

Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms Drug Interactions

Want to check YOUR meds against Myco Shield Throat Spray Winter Mist?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

Go to the checker
501Drugs
494 Moderate 7 Minor

Each ingredient & the kinds of drugs it affects

For each ingredient in Myco Shield Throat Spray Winter Mist with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Reishi Mycelium Extract, Fresh3 drug types · 375 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
A dose of 1.5 grams daily of reishi mushroom does not seem to decrease platelet aggregation, but a higher dose of 3 grams daily does.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, reishi mushroom might have additive effects with antidiabetes drugs.
Animal research suggests that reishi mushroom decreases blood sugar. However, in patients with type 2 diabetes, taking reishi mushroom does not reduce fasting glucose levels, and its effects on glycated hemoglobin are inconsistent.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, concurrent use of reishi mushroom with antihypertensive drugs might increase the risk of hypotension.
Reishi mushroom has shown hypotensive activity in animal research. Clinical evidence suggests that reishi mushroom reduces blood pressure in some, but not all, patients with hypertension.

Likelihood Possible Evidence D

Chaga Mycelium Extract, Fresh3 drug types · 327 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, chaga may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro and animal research suggests that chaga extract can inhibit platelet aggregation. This effect has not been reported in humans.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, taking chaga with antidiabetes drugs might increase the risk of hypoglycemia.
Animal research suggests that chaga might decrease blood glucose levels and increase insulin levels. This has not been reported in humans.

Likelihood Possible Evidence D
Immunosuppressants

Theoretically, chaga might interfere with immunosuppressive therapy.
In vitro research suggests that certain constituents of chaga stimulate immune function. This has not been reported in humans.

Likelihood Possible Evidence D

Birch Polypore Mycelium Extract, Fresh1 drug type · 75 drugs

Diuretic Drugs

Theoretically, birch might interfere with diuretic therapy.

Likelihood Possible Evidence D
The maker

Brand information

Manufacturer and brand details for Myco Shield Throat Spray Winter Mist, from the product label.

Host Defense Mushrooms

See all Host Defense Mushrooms products
Name
Fungi Perfecti, LLC
Street Address
PO Box 7634
City
Olympia
State
WA
ZipCode
98507
Phone Number
877-504-6926
Web Address
Hostdefense.com
Pharmacist Counseling Corner

Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms: Common Questions

Does Myco Shield Throat Spray Winter Mist by Host Defense Mushrooms interact with any medications?
Yes. Based on its ingredients, Myco Shield Throat Spray Winter Mist has a known interaction with 501 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Myco Shield Throat Spray Winter Mist contains 5 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I use this spray if I'm on a blood thinner?
Probably not without checking first. Both chaga and reishi in this spray may increase bleeding risk when combined with blood thinners. Talk to your pharmacist before starting — they can review your specific medication and dose.
Is this safe during pregnancy or breastfeeding?
The safety data advise against it during both pregnancy and breastfeeding — there isn't enough information to know either way. Talk with your doctor or pharmacist for personalized advice based on your situation.
What are the side effects I might notice?
Reishi, one of the active ingredients, may cause dizziness, dry mouth, itching, nausea, rash, or stomach upset. Some people have reported sore throat or runny nose. If you have a birch pollen allergy, you may also react to the birch polypore in this spray.
Will this actually help with a sore throat?
The evidence for what these mushroom extracts do isn't established in the data we hold. If you're using this spray for a specific reason, ask your pharmacist what research supports it for your situation.
Is this safe if I have kidney problems?
Chaga contains high concentrations of oxalate and there are rare reports of kidney failure tied to excessive chaga use. If you have kidney concerns, talk to your doctor or pharmacist before using this product.
What are the inactive ingredients?
The spray contains water, alcohol, and sweet birch oil as inactive ingredients. If you're sensitive to birch or alcohol, let your pharmacist know.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Myco Shield Throat Spray Winter Mist is safe with your meds?

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Myco Shield Throat Spray Winter Mist label
Sources

Sources & How We Checked

Myco Shield Throat Spray Winter Mist's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 30 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Chaga 9 references
  1. Sun JE, Ao ZH, Lu ZM, et al. Antihyperglycemic and antilipidperoxidative effects of dry matter of culture broth of Inonotus obliquus in submerged culture on normal and alloxan-diabetes mice. J Ethnopharmacol 2008;118(1):7-13. PubMed
  2. Hyun KW, Jeong SC, Lee DH, et al. Isolation and characterization of a novel platelet aggregation inhibitory peptide from the medicinal mushroom, Inonotus obliquus. Peptides 2006;27(6):1173-8. PubMed
  3. Kim YO, Han SB, Lee HW, et al. Immuno-stimulating effect of the endo-polysaccharide produced by submerged culture of Inonotus obliquus. Life Sci 2005;77(19):2438-56. PubMed
  4. Kikuchi Y, Seta K, Ogawa Y, et al. Chaga mushroom-induced oxalate nephropathy. Clin Nephrol 2014;81(6):440-4. PubMed
  5. Lee S, Lee HY, Park Y, et al. Development of end stage renal disease after long-term ingestion of chaga mushroom: case report and review of literature. J Korean Med Sci. 2020;35(19):e122.
  6. Kwon O, Kim Y, Paek JH, et al. Chaga mushroom-induced oxalate nephropathy that clinically manifested as nephrotic syndrome: A case report. Medicine (Baltimore) 2022;101(10):e28997. PubMed
  7. Su L, Xin C, Yang J, et al. A polysaccharide from Inonotus obliquus ameliorates intestinal barrier dysfunction in mice with type 2 diabetes mellitus. Int J Biol Macromol 2022;214:312-323. PubMed
  8. Chen S, Ma Y, Li H, et al. Anti-diabetic e?ects of Inonotus obliquus extract in high fat diet combined streptozotocin-induced type 2 diabetic mice. Nutr Hosp 2022;39(6):1256-1263. PubMed
  9. Ye X, Wu K, Xu L, et al. Methanol extract of Inonotus obliquus improves type 2 diabetes mellitus through modifying intestinal flora. Front Endocrinol (Lausanne) 2023;13:1103972. PubMed

See these in context on the Chaga monograph →

Birch 4 references
  1. Robbers JE, Tyler VE. Tyler's Herbs of Choice: The Therapeutic Use of Phytomedicinals. New York, NY: The Haworth Herbal Press, 1999.
  2. Lahti, A. and Hannuksela, M. Immediate contact allergy to birch leaves and sap. Contact Dermatitis 1980;6(7):464-465. PubMed
  3. Allam JP, Wuestenberg E, Wolf H, et al. Immunologic response and safety in birch pollen sublingual versus oral vestibule immunotherapy: a pilot study. J Allergy Clin Immunol. 2014;133(6):1757-9.e3. PubMed
  4. Meyer-Hoffert U, Brasch J. Allergic contact dermatitis caused by betulin-containing triterpene extract from the outer bark of birch (Betula alba). Contact Dermatitis. 2013;68(6):382-3.

See these in context on the Birch monograph →

Reishi Mushroom 17 references
  1. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Tao J, Feng KY. Experimental and clinical studies on inhibitory effect of ganoderma lucidum on platelet aggregation. J Tongji Med Univ 1990;10:240-3. PubMed
  3. Singh AB, Gupta SK, Pereira BM, Prakash D. Sensitization to Ganoderma lucidum in patients with respiratory allergy in India. Clin Exp Allergy 1995;25:440-7.
  4. Lee SY, Rhee HM. Cardiovascular effects of mycelium extract of Ganoderma lucidum: inhibition of sympathetic outflow as a mechanism of its hypotensive action. Chem Pharm Bull (Tokyo) 1990;38:1359-64. PubMed
  5. Kwok Y, Ng KFJ, Li, CCF, et al. A prospective, randomized, double-blind, placebo-controlled study of the platelet and global hemostatic effects of Ganoderma lucidum (Ling-Zhi) in healthy volunteers. Anesth Analg 2005;101:423-6. PubMed
  6. Wanmuang, H., Leopairut, J., Kositchaiwat, C., Wananukul, W., and Bunyaratvej, S. Fatal fulminant hepatitis associated with Ganoderma lucidum (Lingzhi) mushroom powder. J Med Assoc Thai. 2007;90(1):179-181.
  7. Seto, S. W., Lam, T. Y., Tam, H. L., Au, A. L., Chan, S. W., Wu, J. H., Yu, P. H., Leung, G. P., Ngai, S. M., Yeung, J. H., Leung, P. S., Lee, S. M., and Kwan, Y. W. Novel hypoglycemic effects of Ganoderma lucidum water-extract in obese/diabetic (+db/+db
  8. Chu, T. T., Benzie, I. F., Lam, C. W., Fok, B. S., Lee, K. K., and Tomlinson, B. Study of potential cardioprotective effects of Ganoderma lucidum (Lingzhi): results of a controlled human intervention trial. Br.J.Nutr. 2012;107(7):1017-1027.
  9. Jin, X., Ruiz, Beguerie J., Sze, D. M., and Chan, G. C. Ganoderma lucidum (Reishi mushroom) for cancer treatment. Cochrane.Database.Syst.Rev. 2012;6:CD007731.
  10. Kabir, Y., Kimura, S., and Tamura, T. Dietary effect of Ganoderma lucidum mushroom on blood pressure and lipid levels in spontaneously hypertensive rats (SHR). J Nutr Sci Vitaminol.(Tokyo) 1988;34(4):433-438. PubMed
  11. Kanmatsuse, K., Kajiwara, N., Hayashi, K., Shimogaichi, S., Fukinbara, I., Ishikawa, H., and Tamura, T. [Studies on Ganoderma lucidum. I. Efficacy against hypertension and side effects]. Yakugaku Zasshi 1985;105(10):942-947. PubMed
  12. Gao, Y., Lan, J., Dai, X., Ye, J., and Zhou, S. A Phase I/II Study of Ling Zhi Mushroom Ganoderma lucidum(W.Curt: Fr.) Lloyd (Aphyllophoromycetideae) Extract in Patients with Type II Diabetes Mellitus. International Journal of Medicinal Mushrooms 2004;6. DOI
  13. Jin H, Zhang G, Cao X, and et al. Treatment of hypertension by linzhi combined with hypotensor and its effects on arterial, arteriolar and capillary pressure and microcirculation. In: Niimi H, Xiu RJ, Sawada T, and et al. Microcirculatory Approach to Asi
  14. Klupp NL, Chang D, Hawke F, Kiat H, Cao H, Grant SJ, Bensoussan A. Ganoderma lucidum mushroom for the treatment of cardiovascular risk factors. Cochrane Database Syst Rev. 2015 Feb 17;2:CD007259. PubMed
  15. Zhao H, Zhang Q, Zhao L, Huang X, Wang J, Kang X. Spore Powder of Ganoderma lucidum Improves Cancer-Related Fatigue in Breast Cancer Patients Undergoing Endocrine Therapy: A Pilot Clinical Trial. Evid Based Complement Alternat Med. 2012;2012:809614.
  16. Pazzi F, Adsuar JC, Domínguez-Muñoz FJ, García-Gordillo MA, Gusi N, Collado-Mateo D. Ganoderma lucidum effects on mood and health-related quality of life in women with fibromyalgia. Healthcare (Basel) 2020;8(4):520. PubMed
  17. Kogure T, Koiwai A, Fukushi D, et al. Hypereosinophilia with hepatic nodule formation caused by Ganoderma lucidum. Intern Med 2021;60(24):3897-3903.

See these in context on the Reishi Mushroom monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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