Nordic Naturals Ultimate Omega Lemon

Our assessment

The evidence shows that Nordic Naturals Ultimate Omega Lemon is a fish oil supplement. Our assessment is based on data for its key ingredient, omega-3 fatty acids, though specific data for this product is limited to the general ingredient profile. For the general ingredient category, the data supports benefits for heart and cognitive health, but you should be aware of the safety profile based on available reports [NIH ODS].

How it works

Think of omega-3s as cellular support — they help maintain cell membrane fluidity and support healthy inflammatory responses throughout your body. For calcium, which is a separate ingredient in some supplements, the mechanism involves bone mineralization by supporting bone density and mineral deposition, as well as neuromuscular relaxation by supporting muscle relaxation and nerve signaling [NIH ODS].

Safety profile

FDA received 592,059 total adverse event reports across all supplements. For the specific ingredient calcium, high intakes might increase the risk of heart disease and prostate cancer. 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]. Data not available for side effects specific to Nordic Naturals Ultimate Omega Lemon.

Our recommendation

Start by checking with your healthcare provider before adding any supplement. For fish oil, choose a product from a reputable brand and follow the label dosage. Be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Our recommendation is to prioritize getting nutrients from food first and use supplements only to fill specific gaps identified by your doctor.

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