Place two fish oil bottles side by side. Now cover the brand names, promotional language and front-label claims. Leave only four things vi:contentReference[oaicite:0]{index=0}PA, DHA and the daily capsule count.
Which bottle can now be compared more fairly?
The useful comparison begins when words such as high strength, concentrated and double strength are set aside. Those phrases may help describe a product, but they do not reset the maths. The serving details and the named EPA and DHA amounts do.
For a fair EPA vs DHA comparison, use four label lines:
- Check whether the figures are per capsule or per serving.
- Record EPA per daily serving.
- Record DHA per daily serving.
- Note how many capsules provide that daily serving.
Then add EPA and DHA. The large fish oil number on the front may describe total oil or a separate equivalence statement, not combined EPA plus DHA. The Gold Health fish oil collection can be compared using the same four lines.
Before comparing EPA and DHA, reset the unit
Fish oil labels do not always start from the same unit. One may show amounts per capsule. Another may show amounts per two-capsule serving. A third may give a serving size that does not match the full daily direction.
Before deciding that one number is larger, work out what each term means:
- Per capsule means the amount in one capsule, even when the directions require more than one.
- Per serving means the amount in the serving defined on that label. A serving may contain one, two or more capsules.
- Per full daily label direction means the total supplied by the standard number of capsules directed for one day.
Here is a fictional example. Neither bottle is being recommended and there is no winner.
| Label line | Bottle A | Bottle B |
|---|---|---|
| How values are listed | Per capsule | Per two-capsule serving |
| EPA shown | 180 mg | 360 mg |
| DHA shown | 120 mg | 240 mg |
| Daily direction | Two capsules | One two-capsule serving |
| Reset daily amount | 360 mg EPA + 240 mg DHA | 360 mg EPA + 240 mg DHA |
Bottle A looked lower only because its figures were listed per capsule. Once both labels are reset to the daily-serving unit, the named EPA and DHA amounts are the same. The daily capsule count is also the same.
The three-number calculation
Once the unit is consistent, the calculation needs only three omega-3 numbers:
- EPA per daily serving
- DHA per daily serving
- Combined EPA plus DHA per daily serving
EPA per daily serve + DHA per daily serve = combined EPA plus DHA per daily serve
Example: 330 mg EPA + 220 mg DHA = 550 mg combined EPA plus DHA per daily serving.
Then add the fourth comparison line: how many capsules are needed to provide that serving?
This combined number is useful because it lets you compare named EPA and DHA on the same basis. It does not decide personal suitability by itself. Directions, cautions, capsule size, cost, diet, medicines and the reason for considering fish oil still matter.
EPA vs DHA is not a winner-takes-all choice
EPA and DHA are both long-chain omega-3 fatty acids. They have overlapping and distinct roles in cell membranes and signalling processes. DHA is particularly concentrated in the brain and retina, but that does not make EPA unimportant or turn DHA into the only omega-3 worth checking.
It is also too simple to describe EPA as only relating to inflammation or DHA as only relating to memory. Both are part of a broader omega-3 picture. Readers who want more detail about DHA and brain-support positioning can continue to Fish Oil and DHA for Memory Support in NZ Older Adults.
A higher EPA-to-DHA ratio is not automatically better. A higher DHA-to-EPA ratio is not automatically better either. The ratio tells you what is in the formulation. It does not tell you, on its own, whether that formulation suits your goal, medicines, health conditions or diet.
There is no universal EPA-to-DHA ratio or daily dose for every adult over 50. Major reference guidance does not provide one general adult intake recommendation specifically for EPA or DHA. A clinician-directed target is a different situation and should be followed with professional guidance.
Read a fish oil label in reverse order
Front labels are designed to be noticed. A calmer comparison starts at the back and works towards the front.
- Directions and cautions. Check the standard daily direction, medicine warnings, allergy information and situations that need professional advice.
- Serving size. Confirm whether the panel describes one capsule, several capsules or another defined serving.
- EPA and DHA amounts. Reset both to the full daily label direction, then add them.
- Actual oil amount. Note how much fish oil or purified oil is physically listed.
- Equivalent or source-material wording. Keep this as a separate label measurement unless the manufacturer clearly explains how it should be used.
- Front-label potency statement. Return to high strength or double strength only after the back-label numbers are clear.
In New Zealand, dietary supplements must meet requirements under the Dietary Supplements Regulations 1985, including labelling requirements, but Medsafe notes there is no pre-approval process for dietary supplements. Reading the complete label remains an important part of an informed comparison.
This reverse order reduces the influence of promotional wording. It also makes it easier to compare fish oil with other omega-oil formats. The same unit-reset method can be used when browsing broader Gold Health omega-oil options.
The Gold Health 2XP Label Maths: 360 + 240, Not Just 2000
The live Gold Health Super Fish Oil 2XP Omega 3 label information gives us a useful worked example. Its daily label direction is one capsule with food or as professionally prescribed. For the standard label direction, one capsule, one serving and one daily serving line up.
A. Actual purified oil listed in the capsule
Purified natural fish oil: 1000 mg
This is the actual purified fish oil amount listed for the capsule.
B. Fish-oil equivalence statement
Equivalent to 2000 mg fish oil
This is a separate equivalence statement on the label. It should not be read as 2000 mg of EPA plus DHA, and it should not be used to create an unsupported concentration claim.
C. Named EPA and DHA contribution
EPA: 360 mg
DHA: 240 mg
The useful named omega-3 calculation is:
360 mg EPA + 240 mg DHA = 600 mg combined EPA plus DHA per capsule and per standard daily serving
The descriptive EPA-to-DHA ratio is 360:240, which simplifies to 3:2. That ratio describes the formulation. It is not an ideal ratio for every adult and it is not personalised dosage advice.
The product page also describes natural orange-oil deodorising, micro-distillation and testing for impurities. These are separate quality or routine considerations. The one-capsule daily direction may also simplify a routine. None of these features adds extra EPA or DHA, makes the equivalence figure part of the EPA plus DHA total, or guarantees a stronger health outcome.
What higher potency changes in an after-50 routine
On a label, higher potency usually means more of the named ingredient or ingredients within a given capsule or serving. In daily life, the practical question is what that changes for the routine.
- Capsule count: How many capsules are needed for the daily label serving?
- Ease of swallowing: Is the capsule size comfortable for the person taking it?
- Memory load: Is the direction simple enough to remember consistently?
- Capsule burden: Does the fish oil add several capsules beside other medicines or supplements?
- Cost per daily serving: Divide the bottle price by the number of standard daily servings, not simply by the number of capsules.
- Routine fit: Can the direction be followed with food and alongside the rest of the person's routine?
Fewer capsules may simplify a routine, especially for someone already managing several daily products. That does not automatically make the product medically superior. A one-capsule product can still be unsuitable for a particular person, while a multi-capsule product may fit another person's professionally guided plan.
Four comparison traps
Trap 1: Comparing total fish oil with combined EPA plus DHA
A front label may highlight total fish oil, while another label highlights EPA plus DHA. These are different measurements. Reset both products to named EPA and DHA per daily serving before comparing them.
Trap 2: Comparing one capsule with a two- or three-capsule serving
A per-capsule number often looks smaller than a per-serving number. Multiply the per-capsule EPA and DHA by the number of capsules in the standard daily direction, or divide a multi-capsule serving only when you need a per-capsule check. Compare the same unit with the same unit.
Trap 3: Using the EPA-to-DHA ratio as a universal quality score
The ratio is descriptive unless a qualified professional has recommended a particular formulation for a defined reason. A 3:2 ratio is not automatically better than 2:1, 1:1 or any other ratio.
Trap 4: Comparing bottle size instead of daily servings
A bottle with 200 capsules lasts 50 days when the daily direction is four capsules. A bottle with 120 capsules lasts 120 days when the daily direction is one capsule. Bottle size alone does not show value or convenience. Count standard daily servings, then compare cost per daily serving.
When to stop calculating and ask a pharmacist
This article is about label arithmetic, not individual medicine or dose decisions. For a broader hand-off on benefits, suitability and safety, read the Fish Oil in NZ After 50 guide.
Ask a pharmacist, GP or other qualified healthcare professional to review the complete label when the person:
- uses warfarin or another anticoagulant
- uses antiplatelet medicine
- has a bleeding disorder
- has surgery planned
- has atrial fibrillation or another heart rhythm concern
- has a fish or seafood allergy
- intends to exceed the label direction
- has been given a clinician-directed EPA or DHA goal
Do not stop or change prescribed medicine because of a supplement label or this article.
Photograph these three label areas before buying
When comparing in a shop or online, photograph or save:
- the front label
- the ingredients and EPA/DHA panel
- the directions and cautions
You can then compare products at home without relying on memory, or show the complete information to a pharmacist. Gold Health can clarify Gold Health product information through the Gold Health contact page. Medication suitability, health conditions and individual amounts belong with a pharmacist, GP or other qualified healthcare professional.
Frequently asked questions
What is the difference between EPA and DHA?
EPA and DHA are both long-chain omega-3 fatty acids. They overlap in how they contribute to cell membranes and signalling, while DHA is especially concentrated in the brain and retina. A label should list them separately.
Is EPA or DHA more important in fish oil?
Neither is automatically more important. The useful formulation depends on the intended use, overall diet, medicines, health conditions and professional advice.
Does 1000 mg fish oil mean 1000 mg omega-3?
Not necessarily. The fish oil amount may include fats beyond named EPA and DHA. Add the listed EPA and DHA to find the combined amount per daily serving.
How do I calculate EPA plus DHA on a fish oil label?
Put both figures on the same daily-serving basis, then add: EPA per daily serving + DHA per daily serving = combined EPA plus DHA per daily serving.
Should I compare fish oil per capsule or per serving?
Compare per daily serving. If a label gives per-capsule figures, multiply by the number of capsules in the standard daily direction before comparing it with another product.
What does equivalent to 2000 mg fish oil mean?
It is a separate equivalence statement about the fish oil on the Gold Health label. It does not mean 2000 mg of EPA plus DHA. Use the named 360 mg EPA and 240 mg DHA figures for that calculation.
What EPA-to-DHA ratio is best after 50?
There is no universal best EPA-to-DHA ratio for every adult over 50. The ratio is descriptive unless a qualified professional has recommended a formulation for a defined reason.
How much EPA and DHA are in Gold Health Super Fish Oil 2XP?
One capsule, which is the listed serving and daily direction, provides 360 mg EPA and 240 mg DHA, for 600 mg combined EPA plus DHA.
Is a higher fish oil number always better?
No. The number may refer to total oil, an equivalent amount, a serving or a capsule. Compare like with like, then check directions, cautions, routine fit and cost per daily serving.
What else should older adults check before choosing fish oil?
Check directions, cautions, capsule count, allergy information, testing statements, cost per daily serving, medicine use and whether the routine is easy to maintain. Ask a pharmacist or GP when suitability is uncertain.
References
- NIH Office of Dietary Supplements: Omega-3 Fatty Acids Fact Sheet for Health Professionals
- Medsafe: Regulation of Dietary Supplements in New Zealand
General information only; not medical advice. Dietary supplements support nutrition and wellbeing but are not medicines. Check with a pharmacist, GP or other qualified healthcare professional if you take medicines, have a health condition, have surgery planned, have allergies or are unsure.
