There are segments of health care products that do not go through the same rigorous testing as others. And often, these misleading claims on the bottles are left unknown for years.
When choosing supplements, more money doesn't necessarily ensure the best product, however, it's likely it does in many cases. When a company invests into 3rd party testing of their products, and searches out ingredients that are sourced ethically, sustainable, and clear of contaminants, that will result in a higher cost. There are also supplement ingredients that are more or less bioavailable to your body's cells. Meaning, some are better absorbed and utilized by your cells than others. If a supplement is not in a highly absorbable form, there is little benefit, and possible disadvantages to consuming that product.
Professional products sold by healthcare practitioners, including Naturopathic doctors, go through rigorous 3rd party testing to ensure the quality and efficacy of their products.
When it comes to your health, spend the money. You only have one body. Invest well!
When you know better, you do better!