Browse evidence-based analysis of health-related claims and assertions
Taking selenium or N-acetyl-cysteine for 6 months doesn't seem to help men with certain types of infertility have babies, even though it improves sperm quality.
In men with certain types of infertility, the total amount of selenium and N-acetyl-cysteine in semen is strongly linked to better sperm quality, including more sperm, better movement, and better shape.
In men with certain types of infertility, higher levels of selenium and N-acetyl-cysteine in semen are strongly linked to better sperm quality, including more sperm, better movement, and better shape.
After taking selenium or N-acetyl-cysteine for 6 months, men with certain types of infertility have lower levels of a hormone called FSH but higher levels of testosterone and inhibin B, which are important for sperm production.
Taking both selenium and N-acetyl-cysteine together for 6 months works better for improving sperm quality than taking either one alone for men with certain types of infertility.
Taking 600 milligrams of N-acetyl-cysteine every day for about 6 months helps men with certain types of infertility have better sperm quality, including more sperm, better movement, and better shape.
Taking 200 micrograms of selenium every day for about 6 months helps men with certain types of infertility have better sperm quality, including more sperm, better movement, and better shape.
NAC doesn't cause more side effects than placebo when taken with OCD medication for kids and teens, with tiredness being the most common side effect in both groups.
Kids and teens with OCD who take NAC along with their medication can move around better than they could before starting treatment, but this improvement isn't better than what kids get from just taking the medication alone.
NAC might help reduce OCD symptoms more than placebo after 10 weeks, but the difference wasn't quite big enough to be considered statistically significant.
Adding NAC to OCD medication doesn't seem to help kids and teens better control their obsessive thoughts compared to just taking the medication alone.
NAC is safe to take along with OCD medication for kids and teens, with no serious side effects and similar side effects to placebo.
Adding NAC to OCD medication doesn't seem to help kids and teens with OCD move around or do physical activities better than just taking the medication alone.
Kids and teens with OCD who take NAC along with their medication have better social interactions and relationships compared to those who just take the medication alone.
Kids and teens with OCD who take NAC along with their medication feel better emotionally compared to those who just take the medication alone.
When kids and teens with OCD take NAC along with their regular medication, their OCD symptoms get much better overall compared to those who just take the regular medication alone.
Adding NAC to a common OCD medication helps kids and teens better control their compulsive behaviors, like repetitive actions they can't stop doing, better than just taking the medication alone.
The antioxidant NAC made the heart cells in mice with heart failure produce about 30-40% less of the proteins that form scar tissue.
The antioxidant NAC didn't change the size of the heart muscle in mice with heart failure.
Mice with a specific genetic modification that causes heart failure had more than double the oxidative stress in their heart cells compared to normal mice.
The antioxidant NAC didn't change the levels of two heart stress markers in mice with heart failure.
Mice with a specific genetic modification that causes heart failure had about 30% worse heart pumping ability compared to normal mice.
The antioxidant NAC didn't change the blood pressure in mice with heart failure, even though it reduced heart scarring.
Giving the antioxidant NAC to mice with heart failure didn't help their heart's pumping ability improve, even though it reduced some scarring.