Here is an article from Hardys on their testing.
If you are taking many of the ingredients individually why not try switching to Hardys with extra vitamers at least for a trial to see if it makes a difference to you.
“In giving nutrient intake guidelines, the U.S Institute of Medicine makes it clear that the balance of ingredients in supplements is critical. They state that an imbalance in the intake of two or more nutrients can have a diverse array of adverse health effects and increase the potential risks of adverse nutrient-nutrient interactions. They also state that excessive intake of one nutrient may interfere with absorption, excretion, transport, storage, function, or metabolism of a second nutrient.
So, in other words, what they’re saying is that if the ingredients in a supplement are not in proper balance, it could be less effective than taking no supplement at all – and even create problems. For instance, if zinc and copper are not balanced properly, it could be worse than having no zinc or no copper in the supplement at all. Similarly, if you take zinc or copper separately, you can imbalance the body and create serious problems.
The critical ratio of calcium, phosphorus, and magnesium is another good example. If you supplement calcium to solve bone issues without also supplementing phosphorus and magnesium in proper balance, you won’t solve the bone issues. In fact, you may actually create osteoporosis. So, the balance of nutrients is a critical issue, and simply having 100% of the RDA of each nutrient, like many supplements on the market, is not ideal. Nutrients must be in optimal balance with other key ingredients to be truly effective.
The most important reason why Daily Essential Nutrients outperforms other supplements is our NutraTek™ proprietary mineral delivery technology. We’ve refined and used this mineral delivery system in our vitamin-mineral formulations since we began, producing never-before-seen results. It combines micronized minerals with specialized organic molecules to maximize mineral absorption and delivery to body cells.
Micronization, which reduces each mineral to tiny particle sizes that the body can use, is a key step of our NutraTek™ proprietary mineral delivery technology. After the chelation process, which we’ll tell you about next, we add one more micronization process to ensure that the final product will be optimally absorbed by the body. All of these processes don’t just involve a couple of hours like most of the supplements on the market. The final product actually takes several days to produce, but it’s well worth it; that’s the price of performance!”