NOW Ultra Omega 3-D is our most potent Omega-3 formula, with 600 mg EPA and 300 mg DHA per softgel. This product is flavored with lemon oil and also provides 1,000 IU Vitamin D-3.
From the FDA's website:
The natural fish oil concentrate used in this softgel is manufactured under strict quality control standards. It is tested to be free of potentially harmful levels of contaminants (i.e. mercury, heavy metals, PCB’s, dioxins, and other contaminants).