A superior form of selenium

  • Supports normal cell growth and development
  • Promotes the production of glutathione, the body’s most powerful antioxidant
  • Supports proper immune function
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SeMet contains selenomethionine, a natural form of the mineral selenium that is the prominent form which the body absorbs from food sources. It is the main form of selenium that is stored in the body, is more effectively used than other forms and is absorbed one and a halt to two times better than selenite, a form commonly found in supplements.

Selenium levels of plant-based foods are unpredictable as they will vary with soil selenium content, making it important to supplement with the absorbable and efficient form of selenium to obtain its health benefits. Selenium is necessary for immune function, supporting the production of glutathione, a powerful antioxidant, and boosting immune cell activity. Supplementing with selenium is important for those who want to promote a healthy immune system and normal cell growth especially as selenium soil content is depleted in many areas of North America.

AOR Advantage

AOR offers selenium in the form of selenomethionine, a less toxic and more potent form of selenium. Selenium’s cancer-fighting strength is linked to its formation of methylselenol. SeMet is directly and easily converted into this important metabolite, making it one of the most superior form of selenium available. AOR’s SeMet comes in the Recommended Dietary Allowance of 55 mcg per capsule with 90 capsules per bottle, allowing for flexible dosing options.




Natural Selenium is selenomethionine, a trace mineral and natural food-form of selenium found in plants such as broccoli and garlic when grown in exceedingly rich soil. Selenium is an antioxidant for the maintenance of good health.


AOR™ guarantees that all ingredients have been declared on the label. Contains no wheat, gluten, nuts, peanuts, sesame seeds, sulphites, mustard, soy, dairy, eggs, fish, shellfish or any animal byproduct.

Adult Dosage

Take one capsule daily with a meal, or as directed by a qualified health care practitioner.


This product contains a corn derived ingredient, do not use this product if you have such allergy.

Main Application
  • Antioxidant
  • Immune support
  • Normal cell growth and differentiation

The information and product descriptions appearing on this website are for information purposes only, and are not intended to provide or replace medical advice to individuals from a qualified health care professional. Consult with your physician if you have any health concerns, and before initiating any new diet, exercise, supplement, or other lifestyle changes.

Serving Size: One Capsule
Selenium (Selenomethionine)
55 mcg

Non-medicinal Ingredients: microcrystalline cellulose, dicalcium phosphate and sodium stearyl fumarate.

Capsule: hypromellose.

Anti-Cancer Trace Mineral

Selenium is now well established as a potent cancer-fighting trace mineral. Areas of the world with more selenium-rich soil have lower cancer rates, and a randomized, double-blind, placebo-controlled trial in the 1990s showed that men taking a daily 200 microgram selenium supplement experienced a 37% lower risk of developing new cancer, and a whopping 50% lower risk of cancer death.

Protective Effect Against Cancer

This form of selenium has been shown to be effective in fighting cancer. In one human trial involving 238 patients with mild or moderate esophageal squamous dysplasia were supplemented with 200mcg of selenomethionine and/or 200mg of the drug celecoxib twice daily for 10 months. After 10 months it was found that although neither selenomethionine nor celecoxib inhibited esophageal squamous carcinogenesis for all high-risk subjects, supplementation with selenomethionine did have a protective effect among subjects with mild esophageal squamous dysplasia at baseline.

Selenium and colorectal cancer reduction in smokers

A study which was coordinated by the National Cancer Institute (NCI) and carried out in a number of medical centres investigated the relationship between advanced colorectal adenoma in smokers and their serum selenium levels. The results indicated that having higher serum selenium levels could reduce the risk of advanced colorectal smokers especially in recent smokers. This study was published in the Cancer Epidemiology, Biomarkers and Prevention (15, 2:315-20, 2006).

A total of 758 participants were selected and had a least one advanced adenoma of the distal colon; the control subjects had a negative sigmoidscopy. There was a notable inverse association between serum selenium and colorectal adenoma (advanced stage) within the group of recent smokers. No relationship existed between adenoma risk and serum selenium in nonsmokers and previous smokers who had quit smoking over 10 years prior. The study results indicated that selenium may reduce the risk of advanced colorectal adenoma development, especially in the recent smoker high-risk group.

Methylselenol Formation is the Key

But not all forms of selenium are equal in their cancer-fighting properties. To everyone’s surprise, the last decade of scientific research has found that selenium’s anticancer effect is not due to its use as part of antioxidant or detoxifying compounds in the body. It’s also not linked to absolute tissue levels of selenium achieved by a given form of selenium, or to its ability to boost the immune system. Instead, the cancer-fighting potency of any form of selenium is linked to its ability to form methylselenol, a critical selenium metabolite in the body.

Selenomethionine: Organic Over Inorganic

Organic forms of selenium, like selenomethionine are directly and easily converted into this key cancer-fighting metabolite by enzymes in the body called methioninases. In contrast, conventional inorganic (selenite or selenate) selenium supplements are not easily converted to methylselenol. Selenomethionine has also been shown to be a very safe form of selenium. It provides a natural, stable and easily absorbed form of the mineral. As a result, SeMet is simultaneously more potent in its cancer-battling prowess, and less toxic per unit of cancer-fighting punch, than other forms of selenium.

SeMet is a natural form of selenium, and is estimated to make up about half of the selenium obtained from dietary sources. It is the main form in which the body stores selenium, and is easily used by the body and has been shown to have a bioavailability at least one and a halt to two times higher than inorganic forms of selenium.