This is the key fact--while the optimal level may not be known, the old minimum was based on a very inadequate criterion. Like saying the minimum requirement of calories is just what it takes to stave off starvation. I have seen the 50,000 prescription, but don't know what it is based on. Certainly a few thousand a day, at least, would be prudent. I take 2000 of D3 daily.
Costco carries 2,000 and 3,000 IU Vit D at a very reasonable price. Reading up on the subject I arrived at taking about 10,000 units two or three times a day. Irregular quantities but at least every night and every morning. No ill effecgs afgter several months and a general improvment.
Also recently diagnosed with low level, half tablet med a day, diabetes. Still learning but am using Nopal (cactus) capsules and have had a drop to normal (under 99) withot h meds and only using the capsules and FRESH (sliced, thorn removed) cactus from a supermarket that has lots of Mexican clients.
Mexican grocery manager, a more serious diabetic, uses the cactus leaves but scrapes the thorns off himself.
He then pops a leaf or two into a blender, with some celery stalks and some parsley and “liquefies” with added water (preferably purified/double filtered/distilled).
The best water can be obtained from a portable distiller unit - about three hours for a gallon (about $150) - several brands on Google. Less expensive units ($99) take about 5-hours to make a gallon.
Anyone interested Freepmail me for the brand I chose and use.
Then lets it breathe (stand), and drink the liquid after removing some of the solid/fibre matter(which is also good for you but less drinkable). He adds a chunk or two of pineapple for taste showing that the Nopal is strong enough to compensate for the sweetness of the pineapple.
Be well!