Selenium 200 mcg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Selenium 200 mcg against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
Selenium 200 mcg is a dietary supplement by OL Olympian Labs with 1 active ingredient. Its ingredients are commonly taken for thyroid health support, antioxidant support, immune support.Based on those ingredients, 321 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Selenium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Selenium 200 mcg by OL Olympian Labs
Ask about any prescription or over-the-counter medication and we check it for interactions with Selenium 200 mcg by OL Olympian Labs — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Selenium 200 mcg by OL Olympian Labs
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.
What’s inside
Full disclosure
This product contains one active ingredient: selenium at 200 micrograms per capsule. Selenium is a mineral your body needs in small amounts for several functions, including supporting thyroid health and acting as an antioxidant.
The remaining ingredients are inactive: vegetarian capsule material, microcrystalline cellulose (a filler), rice flour, ascorbyl palmitate (a form of vitamin C used as a preservative), and silicon dioxide (an anti-caking agent).
Does it work?
Strong evidence
The evidence for selenium varies by condition. It's likely effective for treating selenium deficiency itself.
For Kashin-Beck disease (a joint disorder linked to low selenium), pre-eclampsia (a pregnancy complication), and autoimmune thyroiditis (thyroid inflammation), the evidence rates as possibly effective—meaning there's some supporting research, but it's not conclusive. For dyslipidemia (abnormal blood fat levels), the evidence rates as possibly ineffective.
How safe is it?
Well-documented data
At the dose in this product (200 mcg daily), selenium is generally well tolerated—most people don't experience side effects. However, selenium can be toxic at high doses.
The safe upper limit is 400 mcg daily; doses above that risk selenosis (excess selenium buildup) affecting your liver, skin, nails, and hair. Common side effects at higher doses include nausea, vomiting, fatigue, and nail changes.
Rare but serious effects from chronic excess include neurological damage and organ failure. Headache has been reported in people taking up to 200 mcg daily for up to 12 months.
For pregnancy, the evidence rates as possibly safe and possibly unsafe—meaning there isn't enough data to know either way. For breastfeeding, it rates as possibly safe.
Talk with your doctor or pharmacist about whether this dose is right for you if you're pregnant, nursing, or planning to become pregnant.
Meds to double-check
Moderate interaction found
Before taking this, check with your doctor or pharmacist if you take blood thinners or antiplatelet drugs (moderate risk of increased bleeding), barbiturates (moderate risk of prolonged sedation), immunosuppressants (moderate risk of reduced effectiveness), warfarin specifically (moderate risk of interference), oral contraceptives (minor—may raise selenium levels), or niacin (minor—may reduce its cholesterol benefits). Use the medication checker on this page to search your exact drugs.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
If you have selenium deficiency or are interested in Kashin-Beck disease or thyroid support, this product is worth discussing with your doctor or pharmacist. The big catch: if you take any blood thinners, antiplatelet drugs, barbiturates, immunosuppressants, or warfarin, you need to clear this with your healthcare provider first because of moderate interaction risk.
At 200 mcg daily, you're below the toxic threshold, but talk it over before you start.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Feb 23, 2022.
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
General information
Key facts about Selenium 200 mcg, straight from the product label.
| Brand | OL Olympian Labs |
|---|---|
| Barcode (UPC) | 710013003874 |
| Net contents | 100 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Feb 23, 2022 |
| DSLD ID | 259825 |
| Product type | Mineral |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), No Allergies, Gluten Free, Dairy Free |
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 Selenium 200 mcg by OL Olympian Labs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Selenium | 200 mcg | 286% |
Other ingredients: Vegetarian Capsule, Microcrystalline Cellulose, Rice Flour, Ascorbyl Palmitate, Silicon Dioxide
Tap any ingredient to jump to its full detail below.
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.
Formulation
Olympian Labs, Inc. products are made with the highest quality ingredients and manufactured according to current Good Manufacturing Practices (cGMP).
We do not use ingredients that were produced using modern biotechnology
Vegan
Gluten free
Supports prostate health Supports cellular antioxidant activity Immune system support
No: Milk, eggs, fish, crustaceans shellfish, tree nuts, peanuts, wheat, or soybeans.
Non-GMO
Made in USA
Precautions
Caution: If you are pregnant or nursing, have a medical condition, or are taking medication, consult your healthcare professional before using this or any other nutritional supplement.
Discontinue use if allergic reaction occurs.
Keep out of reach of children.
Allergen free
Do not exceed two capsules per day.
Prop 65 Warning for California Residents Warning: This product can expose you to chemicals, including lead, cadmium, arsenic and mercury which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
Storage
Store in a cool, dry place.
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.
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take one (1) capsule daily with a meal, or as directed by a healthcare professional.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Selenium 200 mcg by OL Olympian Labs label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in Selenium 200 mcg by OL Olympian Labs
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container100 Amounts shown are per serving.
Selenium
Interacts with321 drugs
Selenium is an essential trace mineral your body needs in small amounts for thyroid function, antioxidant defense, and immune health. Most people who...
Selenium monograph & interactionsOther (inactive) ingredients: Vegetarian Capsule, Microcrystalline Cellulose, Rice Flour, Ascorbyl Palmitate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.
Selenium 200 mcg by OL Olympian Labs Drug Interactions
HelloPharmacist Interaction Report
Selenium 200 mcg by OL Olympian Labs has documented interactions with several medication types.
The most serious concern is with blood thinners and antiplatelet drugs (anticoagulants/antiplatelets): selenium may increase bleeding risk by enhancing antiplatelet effects. This is a Moderate severity interaction.
Read the full breakdown — every affected drug type, severity by severity
Moderate interactions also affect immune-suppressing medications—selenium may reduce their effectiveness by stimulating your immune system. Barbiturates (sedating drugs) may have prolonged effects if combined with selenium, since selenium can slow how your body breaks them down.
Warfarin (Coumadin), a common blood thinner, may also be affected; selenium could interfere with how warfarin works through several mechanisms.
Minor interactions are documented with oral contraceptives (which may raise selenium levels, though the clinical meaning isn't clear) and niacin (which selenium might reduce the beneficial effects of on HDL cholesterol).
Additionally, one other ingredient we hold data for—rice flour—was checked with no interactions documented. Altogether, these interactions span 321 individual medications.
Use the medication checker on this page to look up your exact prescriptions before starting this supplement.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Selenium 200 mcg?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Selenium 200 mcg interact with 321 drugs. Click any drug to see the details.
1 of the 1 ingredient in Selenium 200 mcg interact with drugs. Each result below shows which ingredient is responsible. Selenium
Aspirin, Ethoheptazine, MeprobamateEquagesic
How Aspirin, Ethoheptazine, Meprobamate interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Ethoheptazine, Meprobamate interactionAspirin, HydrocodoneAlor 5 500, Lortab ASA
How Aspirin, Hydrocodone interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Hydrocodone interactionAspirin, MeprobamateMicrainin
How Aspirin, Meprobamate interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Meprobamate interactionAspirin, MethocarbamolRobaxisal
How Aspirin, Methocarbamol interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Methocarbamol interactionAspirin, OmeprazoleYosprala
How Aspirin, Omeprazole interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Omeprazole interactionAspirin, OxycodonePercodan
How Aspirin, Oxycodone interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Oxycodone interactionAspirin, PentazocineTalwin Compound
How Aspirin, Pentazocine interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aspirin, Pentazocine interactionAtezolizumabTecentriq
How Atezolizumab interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Atezolizumab interactionAtropine, Hyoscyamine, PhenobarbitalHypnaldyne
How Atropine, Hyoscyamine, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Atropine, Hyoscyamine, Phenobarbital interactionAtropine, Hyoscyamine, Phenobarbital, ScopolamineBarbidonna No. 2, Belladonna Phenobarbital
How Atropine, Hyoscyamine, Phenobarbital, Scopolamine interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Atropine, Hyoscyamine, Phenobarbital, Scopolamine interactionAtropine, Hyoscyamine, Scopolamine, PhenobarbitalBarbeloid, Donnatal #2, Donphen
How Atropine, Hyoscyamine, Scopolamine, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Atropine, Hyoscyamine, Scopolamine, Phenobarbital interactionAtropine, PhenobarbitalAnthrocol
How Atropine, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Atropine, Phenobarbital interactionAzamuneImmunoprin
How Azamune interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Azamune interactionAzathioprineAzamune, Imuran
How Azathioprine interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Azathioprine interactionBasiliximabSimulect
How Basiliximab interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Basiliximab interactionBeclometasone DipropionateBecotide
How Beclometasone Dipropionate interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Beclometasone Dipropionate interactionBeclomethasoneBeclovent, Vanceril
How Beclomethasone interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Beclomethasone interactionBeclomethasone DipropionateQNASL, Qvar
How Beclomethasone Dipropionate interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Beclomethasone Dipropionate interactionBelladona Extract, PhenobarbitalChardonna-2
How Belladona Extract, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladona Extract, Phenobarbital interactionBelladonna Alkaloids, Ergotamine Tartrate, PhenobarbitalBel Tabs, Bellamine-S, Bellaphen-S, Duragal S, Phenarbal S, Spastrin
How Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interactionBelladonna Alkaloids, PhenobarbitalBarbidonna, Donnatal
How Belladonna Alkaloids, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna Alkaloids, Phenobarbital interactionBelladonna Extract, Butabarbital SodiumButibel
How Belladonna Extract, Butabarbital Sodium interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna Extract, Butabarbital Sodium interactionBelladonna Extract, PhenobarbitalBelap
How Belladonna Extract, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna Extract, Phenobarbital interactionBelladonna, Caffeine, Ergotamine, PentobarbitalMicomp PB
How Belladonna, Caffeine, Ergotamine, Pentobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna, Caffeine, Ergotamine, Pentobarbital interactionBelladonna, Ergotamine Tartrate, Phenobarbital
How Belladonna, Ergotamine Tartrate, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna, Ergotamine Tartrate, Phenobarbital interactionBelladonna, Ergotamine, PhenobarbitalBellergal-S
How Belladonna, Ergotamine, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna, Ergotamine, Phenobarbital interactionBelladonna, PhenobarbitalBellophen, Susano
How Belladonna, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Belladonna, Phenobarbital interactionBellafoline, Caffeine, Ergotamine Tartrate, PentobarbitalCafergot PB
How Bellafoline, Caffeine, Ergotamine Tartrate, Pentobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Bellafoline, Caffeine, Ergotamine Tartrate, Pentobarbital interactionBellafoline, PhenobarbitalBelladenal, Belladenal-S
How Bellafoline, Phenobarbital interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Bellafoline, Phenobarbital interactionBetamethasoneCelestone, Diprolene AF, Diprosone
How Betamethasone interacts with Selenium 200 mcg — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Betamethasone interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Selenium 200 mcg with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Selenium
Anticoagulant/Antiplatelet Drugs
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Clinical research suggests that taking selenium 10 mcg/kg/day can increase bleeding times by increasing prostacyclin production, which inhibits platelet activity. Other clinical research suggests that taking selenium 75 mcg daily, in combination with ascorbic acid 600 mg, alpha-tocopherol 300 mg, and beta-carotene 27 mg, reduces platelet aggregation.
Barbiturates
Theoretically, selenium might prolong the sedating effects of barbiturates.
Laboratory research suggests that selenium can inhibit the hepatic metabolism of barbiturates. Selenium seems to prolong the sedative effect of pentobarbital in animal models.
Immunosuppressants
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
In vitro research and preliminary clinical evidence suggests that selenium may stimulate the immune system.
Warfarin (Coumadin)
Theoretically, selenium might interfere with warfarin activity.
Animal research suggests that selenium can increase warfarin activity. Selenium might interact with warfarin by displacing it from albumin binding sites, reducing its metabolism in the liver, or by decreasing production of vitamin K-dependent clotting factors. Selenium can also prolong bleeding times in humans by increasing prostacyclin production, which inhibits platelet activity.
Contraceptive Drugs
Contraceptive drugs might increase levels of selenium, although the clinical significance of this effect is unclear.
Some research suggests that oral contraceptives increase serum selenium levels in women taking oral contraceptives; however, other research shows no change in selenium levels. It is suggested that an increase could be due to increased carrier proteins, indicating a redistribution of selenium rather than a change in total body selenium.
Niacin
Selenium might reduce the beneficial effects of niacin on high-density lipoprotein (HDL) levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as selenium, or to the combination. It also is not known whether it will occur in other patient populations.
Brand information
Manufacturer and brand details for Selenium 200 mcg, from the product label.
OL Olympian Labs
See all OL Olympian Labs products- Name
- Olympian Labs, Inc.
- City
- Phoenix
- State
- AZ
- ZipCode
- 85027
- Phone Number
- 1-800-473-5883
- Web Address
- www.olympianlabs.com
Selenium 200 mcg by OL Olympian Labs: Common Questions
Does Selenium 200 mcg by OL Olympian Labs interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What does selenium do?
Is 200 mcg safe, or is it too much?
Can I take this while pregnant or breastfeeding?
What side effects might I experience?
Does selenium actually work for thyroid problems?
Will this interact with my blood pressure or cholesterol medication?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Selenium 200 mcg is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Selenium 200 mcg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Selenium 200 mcg'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 36 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.
Selenium 36 references
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: National Academy Press, 2000. Available at: http://www.nap.edu/books/0309069351/html/.
- Brown BG, Zhao XQ, Chait A, et al. Simvastatin and niacin, antioxidant vitamins, or the combination for the prevention of coronary disease. N Engl J Med 2001;345:1583-93. DOI
- Trafikowska U, Zachara BA, Wiacek M, et al. Selenium supply and glutathione peroxidase activity in breastfed Polish infants. Acta Paediatr 1996;85:1143-5. PubMed
- Duffield-Lillico AJ, Slate EH, Reid ME, et al. Selenium supplementation and secondary prevention of nonmelanoma skin cancer in a randomized trial. J Natl Cancer Inst 2003;95:1477-81.. PubMed
- Cheung MC, Zhao XQ, Chait A, et al. Antioxidant supplements block the response of HDL to simvastatin-niacin therapy in patients with coronary artery disease and low HDL. Arterioscler Thromb Vasc Biol 2001;21:1320-6. PubMed
- Schiavon R, Freeman GE, Guidi GC, et al. Selenium enhances prostacyclin production by cultured endothelial cells: possible explanation for increased bleeding times in volunteers taking selenium as a dietary supplement. Thromb Res 1984;34:389-96. PubMed
- Davila JC, Edds GT, Osuna O, Simpson CF. Modification of the effects of aflatoxin B1 and warfarin in young pigs given selenium. Am J Vet Res 1983;44:1877-83. DOI
- Heese HD, Lawrence MA, Dempster WS, Pocock F. Reference concentrations of serum selenium and manganese in healthy nulliparas. S Afr Med J 1988;73:163-5.
- Lloyd B, Lloyd RS, Clayton BE. Effect of smoking, alcohol and other factors on the selenium status of a healthy population. J Epidemiol Commun Health 1983;37:213-7. PubMed
- Capel ID, Jenner M, Williams DC, et al. The effect of prolonged oral contraceptive steroid use on erythrocyte glutathione peroxidase activity. J Steroid Biochem 1981;14:729-32. PubMed
- Contempre B, Dumont JE, Ngo B, et al. Effect of selenium supplementation in hypothyroid subjects of an iodine and selenium deficient area: the possible danger of indiscriminate supplementation of iodine-deficient subjects with selenium. J Clin Endocrinol PubMed
- Hofbauer LC, Spitzweg C, Magerstadt RA, Heufelder AE. Selenium-induced thyroid dysfunction. Postgrad Med J 1997;73:103-4. PubMed
- Debski B, Milner JA. Dietary selenium supplementation prolongs pentobarbital induced hypnosis. J Nutr Biochem 2004;15:548-53. PubMed
- Ishikawa M, Sasaki M, Koiwai K, et al. Inhibition of hepatic mixed-function oxidase enzymes in mice by acute and chronic treatment with selenium. J Pharmacobiodyn 1992;15:377-85. PubMed
- Lippmann SM, Klein EA, Goodman PJ, et al. Effect of selenium and vitamin E on risk of prostate cancer and other cancers: the selenium and vitamin E cancer prevention trial (SELECT). JAMA 2009;301:39-51. DOI
- Reid SM, Middleton P, Cossich MC, Crowther CA. Interventions for clinical and subclinical hypothyroidism in pregnancy. Cochrane Database Syst Rev 2010;(7):CD007752. PubMed
- Vinceti, M., Wei, E. T., Malagoli, C., Bergomi, M., and Vivoli, G. Adverse health effects of selenium in humans. Rev.Environ.Health 2001;16(4):233-251. PubMed
- Abrams, C. K., Siram, S. M., Galsim, C., Johnson-Hamilton, H., Munford, F. L., and Mezghebe, H. Selenium deficiency in long-term total parenteral nutrition. Nutr Clin Pract 1992;7(4):175-178. PubMed
- Spiller, H. A. and Pfiefer, E. Two fatal cases of selenium toxicity. Forensic Sci Int 8-24-2007;171(1):67-72. PubMed
- Negro, R., Greco, G., Mangieri, T., Pezzarossa, A., Dazzi, D., and Hassan, H. The influence of selenium supplementation on postpartum thyroid status in pregnant women with thyroid peroxidase autoantibodies. J Clin Endocrinol.Metab 2007;92(4):1263-1268. PubMed
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