More often than not, it is the fillers in the supplements that cause issues. There are a few companies that address this. Here are a couple:
1) Pure Encapsulations – expensive though…
2) Dr. Ron’s
I take Ubiquinol rather than CoQ10. Mercola has a good one with no additives:
Other Ingredients: Medium chain triglycerides, Citrus extract, Capsule (Tilapia Fish Gelatin,Water).
If you’re taking supplements for cardiovascular health – I have found something that is amazing! I originally was researching for my teeth – and found vitamin K2. The cardiovascular studies on this vitamin are truly impressive. There are 2 forms – MK4 and MK7. Almost everything you find is MK7 but MK4 seems to be better. I buy the Thorne drops and take 2 drops per day. Don’t go by the directions – they advise far too much. 2 drops is plenty. The bottle will last a loooong time. http://www.iherb.com/thorne-research-vitamin-k2-1-fl-oz-30-ml/21592
Here’s some info on it:
“Vitamin K2 is a little known but extremely important fat-soluble vitamin. Some coin this nutrient ‘the missing link’.
In a nutshell, vitamin K2 plays an important role in mineral absorption and metabolism. It helps to move calcium into the proper areas in your body, such as your bones and teeth. It also plays a role in removing calcium from areas where it shouldn’t be, such as in your arteries and soft tissues. K2 is really critical for keeping your bones strong and your arteries clear. Its other main role is to activate proteins that control cell growth. That means K2 has a very important role to play in cancer protection,
A recent study examined the relationship between K2 (in the form of MK-4 through 10) consumption and heart attack risk in 4,600 Dutch men. They found a strong inverse association between K2 consumption and heart attack mortality risk. Men with the highest K2 consumption had a whopping 51% lower risk of heart attack mortality and a 26% lower risk of death from all causes compared to men eating the least K2.
Perigord, France is the world’s capital of foie gras, or fatty goose liver. Foie gras turns out to be the richest known source of K2. Perigord also has the lowest rate of cardiovascular mortality in France, a country already noted for its low CVD mortality.
Rats fed warfarin, a drug that inhibits K2 recycling, develop arterial calcification. Feeding the rats K2 completely inhibits this effect. Mice lacking matrix Gla protein (MGP), a vitamin K-dependent protein that guards against arterial calcification, develop heavily calcified aortas and die prematurely. The link between K2 and cardiovascular disease is a very strong one.
Vitamin K2, MK-4 is only found in animal products. The best sources known are grass-fed butter from cows eating rapidly growing grass, and foie gras.”