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Ultra Strength One-per-Day RxOmega-3 with Vitamin D3 25 mcg (1000IU)

Natural Factors
4.9
(1639 ratings)
DHA 600 mg
Omega-3 900 mg
Fish Oil 1407 mg
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Score97

A high-potency, one-a-day fish oil with added Vitamin D3 for heart and immune support.

How scoring works
Quantity:150 Softgel(s)(150 servings)
Goals:
Anti-Inflammatory Support
Cardiovascular Support
Skin Health

Score 97

A high-potency, one-a-day fish oil with added Vitamin D3 for heart and immune support.

How scoring works
$49.67($0.33 per serving)
iHerb
$ 49.67
Vitacost
$ 49.67
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Analysis

Each softgel provides 600mg of EPA and 300mg of DHA, plus 1000IU of Vitamin D3. This combination supports heart health, skin integrity, and a healthy immune response all at once.

It uses pharmaceutical-grade oil from sustainable small fish. This is a very convenient option for people who want multiple benefits from a single daily capsule.

Pros

  • Includes Vitamin D3
  • 900mg of active omega-3s per pill
  • Pharmaceutical-grade purity
  • Excellent value in the 150-count size

Cons

  • Ethyl ester form
  • Softgels are quite large

Warnings

  • Contains fish
  • Contains Vitamin D; check other supplements to avoid over-intake

Nutrient quality

93 Highest impact

High-purity fish oil concentrate provides a substantial 900mg of active omega-3s for systemic support. The addition of a therapeutic dose of vitamin D3 enhances the formula's utility for immune and bone health.

Ingredient transparency

98 Highest impact

Labeling clearly identifies the amounts for both total omega-3s and vitamin D3, facilitating precise nutrient tracking. Sourcing information and pharmaceutical-grade standards are prominently communicated to the user.

Customer satisfaction

98 Highest impact

Superior customer ratings reflect a very high level of reliability and user satisfaction with the product. Feedback suggests that the one-per-day convenience and lack of aftertaste are significant benefits.

Value for money

99 Highest impact

Outstanding value is provided by the combination of high-potency omega-3s and vitamin D3 at a competitive price. This formula offers one of the best price-per-serving ratios for integrated wellness support.

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Goals

Impact
Highest effect
A+ Goal FitA Strength of SupportA- CoverageA+ Formula Quality

Natural Factors RxOmega-3 provides a potent 900 mg dose of omega-3 fatty acids alongside a therapeutic 1,000 IU dose of vitamin D3. This combination appears well aligned with goals for both lipid-mediated inflammatory resolution and immune modulation.

The pharmaceutical-grade oil ensures high purity and concentrated delivery of active components. Consistent intake of these synergistic nutrients contributes to the maintenance of healthy systemic balance and oxidative defense.

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Impact
Highest effect
A+ Goal FitB+ Strength of SupportC+ CoverageA+ Formula Quality

This pharmaceutical-grade concentrate provides a high-potency dose of omega-3 fatty acids along with 1000IU of vitamin D3. The combination of EPA, DHA, and cholecalciferol supports both lipid management and vascular health in a convenient daily softgel.

The use of sustainable, wild-caught fish and third-party verification ensures a high standard of purity for long-term use. The inclusion of vitamin E as a stabilizer helps protect the delicate marine lipids from oxidation.

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Impact
Highest effect
A- Goal FitB+ Strength of SupportC+ CoverageA Formula Quality

Support for the skin's moisture barrier and cellular turnover is provided through a high dose of Omega-3 fatty acids and Vitamin D3. These nutrients contribute to dermal hydration and the maintenance of a healthy skin surface.

Dosing at 900mg of Omega-3s provides meaningful levels for supporting barrier integrity. Use of an ethyl ester concentrate ensures a high potency per serving, though it may be less bioavailable than triglyceride-form alternatives.

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Ingredients

IngredientAmount per serving
Calories
15 Calorie(s)
Total Fat
1.5 Gram(s)
Cholesterol
5 mg
Vitamin D3
25 mcg
pharmaceutical grade Fish Oil concentrate
1407 mg
Omega-3 Fatty Acids
900 mg
Docosahexaenoic Acid Ethyl Ester
600 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
DHA · 600 mg OverallScore87
B- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value
This ultra-strength one-per-day formula provides a massive 900mg dose of DHA with Vitamin D3. It is a high-value, high-potency choice for comprehensive cognitive and bone health.
Omega-3 · 900 mg OverallScore81
B- Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value
This ultra-strength softgel provides a massive dose of DHA and EPA with added vitamin D3 for complete support. It is highly pure and represents one of the best values on the market for high-potency fish oil.
Fish Oil · 1407 mg OverallScore78
C+ Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyA+ Value
This ultra-strength formula offers a high concentration of omega-3s alongside a therapeutic dose of Vitamin D3. It provides good value and clear transparency, although it utilizes the ethyl ester form rather than triglycerides.
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