I am sure it is great for adults
I received this in the mail because I ordered the wrong liquid vitamin d. It does not have a dropper and would not work for our son who is 4. The exchange process was easy and everyone was nice.
This product probably saved my life
Vitamin D levels are not tested during routine blood tests here in the UK which is negligent to put it mildly, considering at least 70% of the population is deficient by March. I eventually had a private blood test and found I was severely deficient after bogus diagnoses like "chronic fatigue" and "fibromyalgia" from doctors - neither of these conditions actually exist and both can be easily treated if you find out which deficiency you have. Both are linked to Vitamin D and other deficiencies. Upon receiving this supplement, I took 50 drops once a week in water and within 12 weeks, I was back to optimally replete. I have now dropped back to 5 drops per day as a maintenance dose and will continue to do so for the foreseeable future as I am finally back to work without the debilitating fatigue associated with a lack of this necessary vitamin. Highly recommended. Liquid is the most bioavailable form and I would not be without this supplement from now on.