I had a severe reaction to taking vitamin D3. I broke out in hives everywhere. I couldn't stop scratching myself. It was fairly awful. I immediately quit taking all vitamins I was using. Doing a little research online I discovered that vit D3 is derived from sheep's wool. I had no idea. I asked 3 pharmacists, 2 doctors, & a doctor specializing in allergies if they had heard of such a thing & neither of them had. Unfortunately I had gave the vitamins away after my reaction. If I had still had them the Doctor could've done a skin test on me. As it was I called the vitamin company and also the food & drug admin here in Canada & gave them both detailed reports of my experience with the Vit D3. Oh, I forgot to mention that yes, I am allergic to wool
I started taking just 300iu vit d a day at the end of Nov 2015, by the middle of Dec 2015 I began waking up feeling weird. Racing heart, couldn't breathe well. On Jan 4 2016, woke up and it was horrible. I was having all of the symtpoms of a heart attack. I went to the ER who of course checked my heart everything looked good. Began having what my doctor thought was panic attacks. At first they were just at night (the same feelings I had when I woke up Jan4). Then they began happening all the time. Then it starting feeling like just everything in me was shutting down. I was digesting food, urinating, my heart beat was so irregular that it would almost take me to my knees at times. My doctor put me on Buspar (which made things worse) began having a reaction to that sever jerking, foggy feeling, shaking on the inside. So I decided to stop everything I was taking. My ex talked to his sister who used to be a nurse and told her the vitamins that I had been taking she said to stay away from the vit d that it could cause all of the symptoms that I was having. So I slowly started reintroducing my vitamins and supplements one at a time except the vit d. I slowly began feeling better and the "attacks" became fewer and farther inbetween then it came time to add my multivitamin back in (I was only doing 1 at a time to find out how I would react before starting another) .
After taking my multivitamin for 3 days it all started happening again. I looked on the label to find vit d so I stopped taking it and within a week it all started going away again. I haven't taken anymore vit d or any vitamin with vit d in it since and things seem to be pretty normal except when I eat foods high in vit d I start having heart palpitations again and an irregular heart beat as well as difficulty breathing. The same goes for being in the sun. I only work part time (20 hrs) but about 6 - 10 hours of that is outside. It is getting warmer so I am not all layered up now and covered head to toe and by the time Friday gets here I have begun having the same issues as when I eat something with vit d in it. I don't get it. I have always been an outside person and have never had any kind of a problem with the sun of vit d before. I don't understand how such a small dose would cause such horrible problems!
Mykind organics brand of vitamin d3, certified vegan d3 from lichen and none GMO works for me. Howerver, if I drink just one glass of milk or eat anything that is fortified with d3, I will break out in hives and itch like crazy for two to three days. ugh!
I was taking omega3 from Trader JOes and got the worst reaction - my muscle became 'frozen' like for a week! Felt dreadful. Now years later am taking Vita D3 and just taking Vita A again and trying Salmon Oil. Realizing something is wrong as am feeling so ill and itchy! Started researching this and found that oils can go rancid and if there's an issue with Vit D3 or other can be your liver is reacting to it. The soy oil and other ingredients too. And possible can go into inflammations of the body which I feel am experiencing. Vitamins interact with each other and getting to much of one may throw the whole healthy thing off in your system. I take a bit of vinegar every day and add more to my foods (Asian style) and drinking more water! Am using Walmart Spring Valley brands and Trader Joes Salmon Oil which am going to curb but not my magnesium! Eat more of my vitamin D and A and not farm raised Salmon! Back to researching. My stepmother a nurse from the Army said 'you are what you eat'...ole school and just about right! Good health!
UPDATE:
I finally found a type of vitamin D supplement that I can tolerate.
There are currently three types of vitamin D supplements available:
1) supplements which contain vitamin D3 derived from lanolin (sheep's wool),
2) supplements which contain vitamin D3 derived from lichen, and
3) supplements which contain vitamin D derived from cod liver oil.
There are a few manufacturers who use *only* cod livers in their cod liver oil products. Most "coid liver oil" products contain primarily vitamin D3 derived from lanolin as the source of their vitamin D. The problem with most of the pure cod liver oil formulations is that they contain an excessive amount of vitamin A.
I have tried several of the lichen-derived products. Most of them contained other ingredients which I could not tolerate. I recently found a manufacturer who makes a very pure formulation which contains only lichen-derived vitamin D3 and organic rice flour. This product is called DailyD and is manufactured by Do Vitamins.
My vitamin D levels were below normal. I am so glad that this company is making this product!
DISCLAIMER: I have no financial interest in this company.
None of the previous posters on this thread are currently active on the forum, so it's unlikely that anyone will respond. It's good to have that information, though, in case someone else has the same/similar issues.