Pack size: 120 capsules

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Selenium

Selenium SeLECT® 200 mcg

56,99 zł

Supports normal immune system function
Supports normal thyroid function
Protects cells from oxidative stress

Overview

A precise daily serving of an essential trace mineral. Each Selenium capsule provides 200 mcg in the organic form L-selenomethionine, which the body readily recognizes and uses.

At the heart of the formula / Selenium

Thoughtful support. Clear purpose.

01Supports normal immune system function
02Supports normal thyroid function
03Protects cells from oxidative stress
04Helps maintain healthy hair and nails
05Supports normal sperm production

Doctor Life / 01

Selenium

Made for your daily routine.

We chose Selenium SeLECT®, a branded ingredient with a clearly specified form. Selenium helps protect cells from oxidative stress, supports normal immune and thyroid function, and helps maintain healthy hair and nails.

Selenium also contributes to normal sperm formation. This single-mineral formula makes the serving clear, while the 120-capsule bottle provides approximately four months of daily use.

Doctor Life / 02

Selenium

Why does selenium matter?

Selenium is needed in small amounts to make selenoproteins. These proteins participate in antioxidant defenses and thyroid hormone metabolism, among other processes. Selenium also supports immune function, healthy hair and nails, and normal sperm formation. The formula uses an organic form of this trace mineral.

Doctor Life / 03

Selenium

What does research say about Selenium?

Research on L-selenomethionine shows that supplementation can increase selenium levels and affect selenoprotein activity. In people with low selenium status, studies have reported changes in markers such as selenoprotein P and glutathione peroxidase. Other research in older adults examines selenium status and thyroid hormone metabolism. Benefits depend on baseline intake and status; more selenium is not necessarily better.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

Each ingredient, its form and quantity — in one place.

Ingredient amounts for the servings shown in the table.
Ingredient	1 capsule
Selenium	200 mcg (364%*)

*NRV: Nutrient Reference Value

Full ingredient list

L-selenomethionine, capsule shell (bulking agent): hydroxypropyl methylcellulose.

How to use

Part of your daily rhythm.

How to use

Take 1 capsule after a meal.

Important information

Do not exceed the recommended daily serving. Food supplements should not replace a varied diet. A balanced diet and a healthy lifestyle are recommended. Store at room temperature, away from sunlight and out of reach of young children. Not recommended during pregnancy or breastfeeding. EFSA’s adult tolerable upper intake level is 255 mcg of selenium daily from all sources, including food and supplements. Account for your diet and other products before combining selenium supplements.

Science & sources

Understand the formula.

These studies examine how L-selenomethionine affects selenium status and selenoprotein activity, and why selenium matters for antioxidant protection and normal thyroid function.

These publications concern the studied ingredients or formulas. They do not all evaluate the finished Doctor Life product, and research results do not guarantee individual outcomes.

01Effects of organic and inorganic selenium supplementation on selenoenzyme activity in blood lymphocytes, granulocytes, platelets and erythrocytes

Katrina M. Brown, Karen Pickard, Fergus Nicol, Geoff J. Beckett, Garry G. Duthie, John R. Arthur

Clinical Science (2000), 98(5), 593-599. DOI: 10.1042/CS19990276; PMID: 10781391.

In healthy adults, L-selenomethionine supplementation affected glutathione peroxidase activity in several types of blood cells. The study shows that this organic form of selenium can be used to support selenium-dependent enzyme activity.

Read publication ↗

02Optimization of selenoprotein P and other plasma selenium biomarkers for the assessment of the selenium nutritional requirement: a placebo-controlled, double-blind study of selenomethionine supplementation in selenium-deficient Chinese subjects

Yiming Xia, Kristina E. Hill, Ping Li, Jiayuan Xu, Dingyou Zhou, Amy K. Motley, Li Wang, Daniel W. Byrne, Raymond F. Burk

The American Journal of Clinical Nutrition (2010), 92(3), 525-531. DOI: 10.3945/ajcn.2010.29642; PMID: 20573787.

In a 40-week study, L-selenomethionine gradually improved markers of selenium status, including selenoprotein P levels and glutathione peroxidase activity. The findings highlight the value of consistent selenium intake when baseline levels are low.

Read publication ↗

03Low selenium status in the elderly influences thyroid hormones

O. Olivieri, D. Girelli, M. Azzini, A. M. Stanzial, C. Russo, M. Ferroni, R. Corrocher

Clinical Science (1995), 89(6), 637-642. DOI: 10.1042/cs0890637; PMID: 8549083.

In a study of older adults, selenium status was associated with thyroid hormone measures. Supplementation improved selenium markers and glutathione peroxidase activity. The publication illustrates selenium's role in thyroid physiology.

Read publication ↗

FAQ / Selenium

Good questions. Clear answers.

Talk to us ↗

Who is this product for?

This product is designed for adults who want to supplement selenium in relation to immune and thyroid function, antioxidant protection, and hair and nail health. Suitability, including for older adults, depends on medication and total selenium intake.

What is distinctive about L-selenomethionine?

L-selenomethionine is an organic selenium compound in which selenium is incorporated into the amino acid methionine. It can enter the body’s amino acid pool. The formula uses Selenium SeLECT®, a branded source with a defined chemical form.

How do I take it?

Take 1 capsule daily after a meal. Each provides 200 mcg of selenium. Do not increase the serving or combine it with other selenium supplements without checking your total intake.

How many days does a bottle provide?

Each bottle contains 120 capsules. At 1 capsule daily, it provides 120 days of use—approximately four months.

Why does one capsule provide 364% NRV?

The 200 mcg serving equals 364% of the EU nutrient reference value. This does not mean a higher intake is better. EFSA’s adult tolerable upper intake level is 255 mcg daily from all sources, including food and supplements. Account for your diet and other products, and seek professional advice before combining selenium supplements.

Can I take selenium with thyroid medication?

If you take thyroid medication, other medication, or have a diagnosed thyroid condition, consult your doctor or pharmacist. This product provides a high selenium serving and does not replace diagnosis, treatment, or thyroid monitoring.

Can I use it during pregnancy or breastfeeding?

No. The product is not recommended during pregnancy or breastfeeding. Discuss mineral intake with your healthcare professional, taking account of your diet and other supplements.

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