Sisu Sisu - Selenium Plus 200 mcg, 60 caps
Sisu Selenium Plus - A vital antioxidant which helps defend the body from free-radical cell development. Selenium also aids in the development of anti-bodies that help maintain a healthy heart and liver and is especially effective when combined with Vitamin E, another powerful, natural antioxidant.

Price
Regular Canadian retail price: $13.98 CAD. Price Vault members pay below retail on this product. Member pricing is private and shown after a free opt-in, with no membership fee, no minimum order and no subscription.
In stock. Free shipping across Canada on orders over $89, flat $9.95 under that. 30 days to request a return, with return shipping paid by the customer. Ships from Victoria, BC.
Why people keep reordering it
- Highly absorbable forms
- Chelated forms your body takes up, instead of oxide that mostly passes through.
- Calm and recovery
- Supports muscle relaxation, sleep quality and everyday stress resilience.
- Gentle on digestion
- Formulated to skip the laxative effect of cheaper magnesium.
Best suited to: someone eating little seafood or organ meat, people supporting thyroid hormone conversion, anyone who wants the food form, not a mineral salt.
What the research supports
One capsule gives 200 mcg of selenium as selenomethionine, the organic form found in food. 60 capsules is two months at one a day.
Studies use 200 mcg a day.
- Thyroid conversion (evidence: moderate, from randomized controlled trial, meta-analysis)
- Selenium is required by the enzymes that convert inactive thyroid hormone T4 into its active form, T3. Trials using 200 mcg a day, the dose in one capsule, have lowered thyroid autoantibodies in people who were low to start.
- Antioxidants (evidence: moderate, from randomized controlled trial, meta-analysis)
- Selenium is built directly into glutathione peroxidase, an enzyme that disarms cell-damaging molecules. Restoring intake in people who are running low brings that enzyme's output back up.
- Immunity (evidence: limited, from small human trials, animal studies)
- Selenium is involved in switching on immune cells during an infection response. In people who already get enough, adding more shows little added effect in trials, so replacing a real gap matters more than the dose itself.
Read the literature: Thyroid conversion on PubMed, Antioxidants on PubMed, Immunity on PubMed.
Is it right for you
Worth it if
- someone eating little seafood or organ meat
- selenium in food tracks the soil it grew in, and 200 mcg of selenomethionine raises status reliably when the usual dietary sources are thin.
- people supporting thyroid hormone conversion
- the deiodinase enzymes that turn T4 into T3 are selenium-dependent, and 200 mcg is the amount used in the trials on that step.
- anyone who wants the food form, not a mineral salt
- selenomethionine is built into body protein the way dietary selenium is, so stores fill gradually instead of spiking and clearing.
Look elsewhere if
- someone who eats Brazil nuts most days
- count what you already get first, since a few nuts can match this capsule outright and stacking the two moves you toward the 400 mcg ceiling.
- vegans and vegetarians
- the capsule shell here is gelatin, so choose a selenium product in a hypromellose or otherwise vegetarian shell.
- a shopper wanting broad antioxidant coverage
- this is one mineral at one dose, so a formula carrying vitamin C, mixed tocopherols and carotenoids covers more ground for the money.
What to expect
Nothing you will feel day to day. Blood selenium climbs over a few weeks, and if thyroid support is the reason you are taking it, the change shows up on bloodwork over two to three months rather than as a symptom you notice.
How it compares
- Compared with the 55 to 100 mcg of selenium already in a daily multivitamin
- this is the full 200 mcg the human trials actually used, not a maintenance top-up. The tradeoff: it is another bottle, and if your multi carries selenium you have to subtract it to stay under the daily limit.
- Compared with sodium selenite tablets
- selenomethionine is the form the body stores in protein, and it is what the large long-term selenium trials were built on. The tradeoff: selenite is cheaper, and because it is not stored the same way it clears faster if you overshoot.
Product details
- Active ingredient
- Selenium (selenomethionine)
- Ingredient form
- caps
- Strength
- 200 mcg
- Servings per container
- 60
- Suggested use
- Take 1 capsule daily or as directed by a health care practitioner.
- Country of manufacture
- Canada
- Independent testing
- independent third-party labs
- Certifications
- Non-GMO, Made in Canada
- Storage
- Store in a cool, dry place
- Brand
- Sisu
How to take it
Take 1 capsule daily or as directed by a health care practitioner.
- Store in a cool, dry place away from direct light.
- Keep out of reach of children.
- Consult a practitioner if you are pregnant, nursing or on medication.
Ingredients
Each capsule contains
- Selenium (selenomethionine)
- 200 mcg
Non-medicinal ingredients
Microcrystalline cellulose, magnesium stearate (vegetable). Capsule shell: Gelatin.
Free from
Contains no dairy, wheat, gluten, corn, soy, or peanuts.
Interactions and cautions
- Medications
- May reduce absorption of certain antibiotics and thyroid medication.
- Timing
- Separate from medications by 2 to 4 hours unless directed otherwise by a healthcare practitioner.
- Pregnancy and breastfeeding
- Consult a healthcare practitioner before use if pregnant or breastfeeding.
- General
- Use only as directed. Discontinue and consult a practitioner if you experience an adverse reaction.
This product is not intended to diagnose, treat, cure or prevent disease. Consult a healthcare practitioner before use. Free certified advisors are available at 1-888-386-1211, Mon to Fri, 9am to 5pm PT.
Questions about Sisu - Selenium Plus
- Is this the genuine, authentic product?
- Yes. It is identical to what you would pay full price for anywhere else, sourced through our authorized supplier relationships.
- How is the price below retail?
- We buy direct, with nobody in the middle taking a cut, and we sell it for close to what we paid. You see the price privately because you have unlocked the Vault.
- How fast does it ship?
- Orders placed before 12pm PT are processed the same day and ship within two business days. Shipping is free over $89, and a flat $9.95 under that.
- Can I return it?
- You have 30 days after it arrives to request a return. Product must be unused, in its original packaging, with proof of purchase, and return shipping is paid by you. Find it cheaper anywhere in Canada and we will match the price.