Prescribed by my Naturopathic Doctor as my vit D3 level was practically zero from living in a norther latitude and being in night shift for years. Take 15 drops (15,000 IU's or one dropper full) and hold under tongue for 30 seconds and swallow. Lemon flavor is pleasant. My energy level seems to be picking up. Follow-up blood tests are not scheduled until next month to check on results.<br /><br />Update: Doc says my blood-test Vit D levels are back to normal and looking good. Next step is to reduce dosage back to a normal 5,000 IU's per day and see if blood test levels hold normal

I’ve should’ve known better. You never know how vitamins are stored at Amazon. I ordered this product because I was running out and wanted to take advantage of Prime shipping. The liquid product looks odd in the glass dropper. Separated and very different from the bottle I bought from a reputable supplement store.

The seller sold me bad medicine that was expired over a year. The rubber dropper was rotten and smelled like a badly used condum. I noticed the bad taste first then noticed the dropper was not right. I took it apart and found it to be rotten and stank badly. Than I called Amazon because it is medicine and can't be returned. Than I noticed it was expired on 4/20, I just got it on 7/30. Bad seller. I would give a negative but it won't let me.

Flavored nicely, but I have seen no effect from this supplement. Wish I could return it and get my money back cause it’s worthless.

My doctor recommended this as he has a firm belief most people are Vitamin D deficient. Although I was taking a pill supplement, blood tests showed I was still deficient. I take 4 drops of this each day - it tastes good. I haven't had another blood test (too expensive) to see if this has improved by Vitamin D levels but trust my doc's recommendation.

My hair has been falling out in the shower and by the time I finished my first bottle in the hair loss had improved by about 90%. I didn’t do anything different except for taking these drops so I’m assuming they are the reason my hair loss has improved.