D2 is bad for you.
Daily D3 is best. You can buy all supplements over the counter and online. You don't need a prescription.
Vitamin D3 is good (cholecalciferol)
Vitamin D2 is bad (ergocalciferol)
Vitamin D2 causes the amyloid protein in your brain to clump together making it difficult to remove this build up of amyloid. This leads to loss of cognitive function and sets up the conditions for Alzheimer's disease progression. Vitamin D3 helps clear amyloid from the brain which aids in improving cognitive function. Keeping 25(OH)D3 levels at or above 50ng/ml [US] or 125nmol/l [UK] is an important factor in reversing cognitive decline. And if that isn't bad enough we have also known for years that Vitamin D2 speeds up the rate at which your body disposes of Vitamin D so the more D2 you take the more you require. Vitamin D2 is also less effective than D3 so you need more D2 to get the same effect as D3.
high doses of vitamin D3 depletes the body of magnesium. And if you are one of those people who are already critically low in magnesium it is important to supplement this important mineral to avoid headaches, cramping, nausea, numbness and more that will result when you begin a high dose of D3.
If you do decide to try a dose higher than 10,000 make sure you drink a minimum of 2.5 liters [almost 85 ounces] of fluids [preferably water, total fluids] per day to guarantee the elimination of calcium through the urine.
Vitamin K2 directs calcium in your body and keeps it from depositing into your arteries. You also need to drink a lot of water especially since you took such high amounts of D. You need to help flush excess calcium from your body.
Take it in the morning. Vitamin D temporarily pauses the production of melatonin, the sleep hormone, so don’t take it at night.
Medications can deplete the body further of vitamins and minerals.
Low normal range can still have symptoms. They will tell you all is normal.
I had low D. I had to supplement with over the counter D3, magnesium, Vitamin K2 daily to raise my levels.
Low D and low magnesium WILL cause anxiety, heart palpitations, fatigue, muscle/bone pain, dizziness, insomnia, various illnesses, headaches, muscle twitches, brain fog...etc. you also need to make sure your potassium and sodium intake is balanced with the magnesium. If you get enough calcium in your diet you won't need extra supplements. The D will until ice calcium better. It's painful because the D is pushing calcium back into your bones. I was in agony for about 3 weeks.
My Vitamin D 25OH test was 19ng/mL in September. They tell you normal lab range is 30-100ng/mL. Anything below 50 isn't good.
I supplemented for a few months then re-tested. My D3 raised to 61ng/mL at Jan test. I need to test again soon to see if my levels are holding steady. That way I can see what amount I need to take for maintenance.
Vitamin D3 supplements, choose ones without soy or sunflower oil. Only take D3. You can also get UVB sun rays in many areas during this time till around end of September. Roughly between hours of 10am-3pm.
Take magnesium along with it. Magnesium is responsible for muscles and many other functions. My anxiety was through the roof when D was low. D and magnesium have eased things a lot. I drink coconut water, orange juice, eat bananas and avocados for potassium. Celtic grey salt for sodium and it also has trace minerals including 3 types of magnesium.