Are you reading pharma posts? Alle natural doctors recommend selenium. I have taken it for years without sideeffects

Wormwood and black walnut for anti-parasite.

As for vitamin D...it's no different than taking iron and many other vitamins. Don't be an idiot and don't overdose and you'll be fine. Since Vitamin D is a fat soluble vitamin it doesn't get pissed out of the body like say vitamin C so overdosing on it is easier. I've taken 10 000IU of Vitamin D for 3 months before and was quite fine. We are deficient in Vitamin D especially in the colder areas where the sun doesn't shine as much. Don't be afraid of life...just use your brain. I know many people are lacking it.

Since you're not smart enough to do actual research I'll save you the trouble. I've been looking into Selenium recently since I've noticed much of my healthy foods contain too much of it and I'm probably going over the 400 mcg per day limit.

Selenium toxicity
Selenium toxicity, also known as selenosis, can occur when excessive amounts of selenium are ingested over time or in a single large dose. Here are some key points about selenium toxicity:

Symptoms: Common symptoms of selenium toxicity include nausea, vomiting, hair loss, nail discoloration or brittleness, joint pain, fatigue, irritability, and a garlic odor in the breath.
Diagnosis: Selenium toxicity is typically diagnosed based on clinical symptoms, as there are no specific biochemical or preclinical parameters for diagnosis.
Causes: Selenium toxicity can be caused by accidental over-supplementation with dietary supplements, contaminated water sources, or prolonged consumption of selenium-rich forages in animals.
Recommended Intake: The recommended dietary allowance for selenium varies by age, with adults and pregnant women requiring 400 µg per day.
Toxic Levels: Acute selenium poisoning can occur at doses much higher than the recommended intake, such as the case of a dietary supplement containing 200 times the labeled concentration of selenium, leading to symptoms in 201 cases across 10 states.
Mechanism: Selenium toxicity can disrupt the balance between reactive oxygen species (ROS) production and antioxidant capacity, leading to oxidative damage and impairing critical physiological functions.
Prevention: Regular testing of soil and forages in high-selenium areas can help prevent chronic selenium poisoning in livestock and horses.
Treatment: Treatment for selenium toxicity depends on the severity and type of poisoning. For chronic cases, supportive care and removal of the selenium source are recommended. Acute poisoning is often fatal, with limited treatment options.
Geographical Distribution: Selenium is unevenly distributed in the environment, with certain regions having high concentrations that can lead to toxicity in both humans and animals.
Sources: Selenium can be found in various forms, including elemental selenium, selenite, selenate, selenide, selenomethionine, and selenocysteine, each with different levels of toxicity and absorption in the body.

Do you take statins? Reason I am asking is cholestorol also makes vitamin D

I don't take anything. Even when my doctor prescribes something about 75% of the time I don't take it or for less than how long she tells me to. At the moment, I have low vitamin D, testosterone, iron and high TSH and cortisol levels. Waiting for my Selenium blood test to tell me if that's high or not. I've definitely been getting over 400mcg of it per day due to tuna salmon nuts liverwurst and whole grain bread. I either have stomach malabsorption since I have stomach issues I still need to get looked at or maybe low vitamin C and that's causing the low iron. I'll have to ask my doctor for another blood test. Living in Canada and with no sun 6-8 months of the year and inside a lot the vitamin D is low for most people. The testosterone might be due to a varicocele that I'm waiting for surgery for lol...so many different issues and my doc can't figure out my problems.