Vitamin D3 5,000IU by Protocol for Life Balance

This high-potency softgel is for adults whose Vitamin D (25-hydroxy) has tested low and who need a repletion dose, or whose clinician has found they need more than standard amounts to hold their level, as can happen with higher body weight or fat-absorption problems. The label itself notes that the upper limit for vitamin D is 4,000 IU per day and says this product should be taken under the supervision of a healthcare professional, so it belongs with a lab result and a retest plan. For routine maintenance, a lower dose is the better fit.

Vitamin D3 (cholecalciferol) is the form skin makes from sunlight, and it raises blood levels more effectively than D2. The liver and kidneys convert it into the hormone that increases calcium absorption from the gut and helps keep parathyroid hormone in check, which is how it supports bone and muscle. The D3 here comes from lanolin and is carried in extra virgin olive oil and safflower oil inside a bovine gelatin softgel, so it is not vegetarian.

Each softgel provides 125 mcg (5,000 IU) of vitamin D3. The label directs 1 softgel daily with a fat-containing meal, or as directed by your healthcare practitioner, who may set a different schedule based on your level. Count every other source of vitamin D you use, such as a multivitamin, a calcium and D combination or cod liver oil, toward your total.

The label says vitamin D should be used cautiously by anyone with hypercalcemia (high calcium) or taking cardiac glycosides such as digoxin, and that it may interact with atorvastatin and thiazide diuretics; if you take any of these, consult your healthcare practitioner before using it. At this dose, use it only under supervision if you have primary hyperparathyroidism, sarcoidosis, kidney disease or a history of kidney stones. Orlistat and bile acid sequestrants reduce absorption. Check with your clinician if you are pregnant or nursing.

Vitamin D (25-hydroxy) rises over 8–12 weeks, so retest at about three months, with Calcium, and step down once you are in range. Staying on 5,000 IU for long periods without testing is how levels drift too high. Signs of excess are those of high calcium: thirst, frequent urination, nausea, constipation and confusion. You will not feel the vitamin working; the lab result tells you.