Last update
3/14/2026
Reviewed By
Reviewed By
Overview
SCIENTIFIC SCORE
Questionable
Based on 1 Research
5
USERS' SCORE
Moderately Good
Based on 17 Reviews
7.9
Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Selenium (elemental) (from 20 mg L-Selenomethionine)
100 mcg
182%
Top Medical Research Studies
5
We examined the levels of selenium and key vitamins in patients suffering from obstructive sleep apnea (OSA) without additional health issues. Our study, involving 146 subjects split into different OSA severity levels, aimed to understand how these antioxidants might play a role in OSA's impact on health.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
Read More
Most Useful Reviews
9
Energy and mood boost
Very good selenium. On the third day of taking it, I noticed increased energy, a good mood, and improved sleep.
Read More
9
Improved sleep quality
Works clearly eliminates the lack of selenium; I began to sleep better, experience fewer mood swings, and have more energy in the morning. My tests have shown improvement.
Read More
9
Calmer sleep achieved
23 people found this helpful
This wonderful supplement is a miracle for those who eat little seafood. My hair has stopped falling out as much, and my sleep has become calmer and stronger. I feel like I have gained more energy.
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Medical Researches
SCIENTIFIC SCORE
Questionable
Based on 1 Research
5
- All Researches
5
We examined the levels of selenium and key vitamins in patients suffering from obstructive sleep apnea (OSA) without additional health issues. Our study, involving 146 subjects split into different OSA severity levels, aimed to understand how these antioxidants might play a role in OSA's impact on health.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
Read More
User Reviews
USERS' SCORE
Moderately Good
Based on 17 Reviews
7.9
- All Reviews
- Positive Reviews
- Negative Reviews
9
Energy and mood boost
Very good selenium. On the third day of taking it, I noticed increased energy, a good mood, and improved sleep.
Read More
9
Improved sleep quality
Works clearly eliminates the lack of selenium; I began to sleep better, experience fewer mood swings, and have more energy in the morning. My tests have shown improvement.
Read More
9
Calmer sleep achieved
23 people found this helpful
This wonderful supplement is a miracle for those who eat little seafood. My hair has stopped falling out as much, and my sleep has become calmer and stronger. I feel like I have gained more energy.
Read More
7
Improved sleep quality
22 people found this helpful
I recommend selenium! It normalises thyroid and pancreas functions, aids in the absorption of fat-soluble vitamins, and reduces overall fatigue. Lack of selenium clearly impacts thyroid performance, which in turn affects hormones. Adhering to the principle of doing no harm, I've been taking one capsule without excessive reliance. Night sweats have ceased, and my sleep has become more profound and longer. I will continue to take it.
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7.5
Insomnia alleviated
7 people found this helpful
I suffered from insomnia, waking up in the middle of the night. After taking selenium for three months, I no longer wake up at night. I believe it has calmed my nervous system.
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Frequently Asked Questions
9
Energy and mood boost
Very good selenium. On the third day of taking it, I noticed increased energy, a good mood, and improved sleep.
7.5
Insomnia alleviated
7 people found this helpful
I suffered from insomnia, waking up in the middle of the night. After taking selenium for three months, I no longer wake up at night. I believe it has calmed my nervous system.
9
Beneficial for sleep
The quality is good, though it can be harsh on my stomach. It suited my mother, and it was beneficial for both of us, helping us sleep deeply.
7
Improved sleep quality
22 people found this helpful
I recommend selenium! It normalises thyroid and pancreas functions, aids in the absorption of fat-soluble vitamins, and reduces overall fatigue. Lack of selenium clearly impacts thyroid performance, which in turn affects hormones. Adhering to the principle of doing no harm, I've been taking one capsule without excessive reliance. Night sweats have ceased, and my sleep has become more profound and longer. I will continue to take it.
7.5
Improved sleep duration
1 people found this helpful
I usually take it with magnesium before bed, and I've been sleeping well all night.
7.5
Noticeable sleep improvement
6 people found this helpful
I noticed my sleep improved because of this, but I advise caution. I heard that you must take iodine with it to prevent sluggishness in the thyroid gland.
7.5
Sleep disturbance relief
4 people found this helpful
This is excellent for selenium deficiency. I no longer have memory difficulties, and my light sleep issues have vanished. I take it with Lugol’s solution, which is essential for a healthy thyroid.
7.5
Improved sleep quality
88 people found this helpful
This vitamin is absolutely incredible. I took it for two weeks straight before noticing any improvements, so I recommend giving it a few weeks to work. It has greatly enhanced my mood and energy levels and even improved my sleep. The only downside is that it upsets my stomach, so during the day, I take half a pill instead.
5
We examined the levels of selenium and key vitamins in patients suffering from obstructive sleep apnea (OSA) without additional health issues. Our study, involving 146 subjects split into different OSA severity levels, aimed to understand how these antioxidants might play a role in OSA's impact on health.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
Interestingly, we found that higher concentrations of selenium and vitamin A appeared to bolster the body’s defense against OSA. Although our findings suggest potential benefits, it's important to note that antioxidants alone should not replace conventional treatments for OSA.
References
- Saruhan E, Sertoglu E, Unal Y, Bek S, Kutlu G. The role of antioxidant vitamins and selenium in patients with obstructive sleep apnea. Sleep Breath. 2021;25:923. 10.1007/s11325-020-02207-w
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