Nordic Naturals Ultimate Omega

Our assessment

The evidence shows that Nordic Naturals Ultimate Omega is a fish oil supplement, and the specific data we have relates to its calcium content. Our assessment: if you are taking this supplement to support bone health, the calcium it contains is a key player. The data confirms that calcium supports bone mineralization and neuromuscular relaxation [NIH ODS]. However, you should be aware that high intakes of calcium from all sources might increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a structural building block and a cell communicator. It works by depositing into your bone matrix to maintain density and strength, and it also helps your muscles relax and your nerves send signals properly [NIH ODS]. The specific mechanism of this product's omega-3s is not covered in the provided data.

Safety profile

Data not available for specific adverse events for this product. However, for the ingredient calcium, the FDA has received a total of 592,059 adverse event reports across all supplements. High levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

If you are using this product for its omega-3 content, be mindful of the calcium it provides. Do not exceed the recommended daily allowance for calcium from all supplements and food combined, which is generally 1,000–1,200 mg for most adults [NIH ODS]. If you take thyroid medication or certain antibiotics, take this supplement at least two hours apart from those medications to avoid absorption issues [NIH ODS]. For overall safety, stick to the serving size on the label and consult your doctor before starting any new supplement regimen.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide