Last updated: September 28, 2026 · Originally published: August 12, 2025 · By Eternal Elixir Editorial
Quick Answer
High-quality ingredients in supplements start with a label that tells you exactly what you are getting: the form of each active, the amount per capsule and per serve, every other ingredient, and how many serves are in the bottle. What sets Eternal Elixir apart is that you can check all of that on every product page. Most of our capsule products come in 90-capsule bottles, many are one capsule a day, and we list the fillers too. Orders ship from Sydney within 24 hours with a 30-day money-back guarantee. If you want one example, our NMN 500mg holds 500mg of NMN in each capsule, 90 capsules for $59.99, or $0.67 a day.
This is Eternal Elixir writing about its own products. Every product figure below is taken from our labels and product pages.
Two supplements can have the same name on the front and very different contents inside. The difference usually shows up in four places: the form of the ingredient, the real amount per serve, what else is in the capsule, and whether anyone has checked that the label matches the bottle. This guide explains each one, gives you a checklist for reading any label, and then shows the same details for our own range so you can judge us by the same standard.
What “High-Quality Ingredients” Actually Means
The form of the ingredient
Many nutrients come in several chemical forms, and the form can change how much your body absorbs. Magnesium is the clearest example. In a study by Firoz and Graber, only about 4% of the magnesium in magnesium oxide was absorbed, while magnesium chloride, lactate and aspartate were absorbed better and to a similar degree. The same study found that some inorganic forms can match organic ones, so “organic” on its own isn’t a guarantee.
Products that use the same form can still differ. Blancquaert and colleagues tested 15 magnesium supplements sold in shops and found very wide differences in how well they dissolved and were absorbed in the lab. When they gave the best and worst performers to 30 people, blood magnesium rose differently in line with the lab results.
The real amount per serve
Look for the amount of the active per capsule and the number of capsules in a serve. Two traps are common:
- Extract ratios. A “20:1” extract means 20 parts of raw herb went into 1 part of extract. Labels often show the herb equivalent, which is a much bigger number than what is in the capsule. Our Berberine HCl label, for example, shows the equivalent of 10,000mg per capsule because each capsule holds 500mg of a 20:1 extract. The 500mg is what you swallow.
- Serve size. A bottle labelled “2,000mg” may mean 2,000mg across three capsules. Price per serve, not price per bottle, is the fair comparison.
Everything else in the capsule
Most capsules contain more than the active: a capsule shell, and often a filler or flow agent so the machine can fill each capsule evenly. These aren’t a sign of low quality in themselves. What matters is that they are listed, so you know what you’re taking. Our NMN, for example, lists NMN, rice flour and a cellulose capsule.
Whether the label matches the bottle
A label is a promise, and testing is how that promise gets checked. A 2019 consensus statement by Eichner and colleagues set out what a credible third-party certification programme for supplements should include, largely because athletes and military personnel need products free of banned substances. For everyday buyers, the practical step is to ask the seller for a certificate of analysis for the batch number printed on your bottle, and to be wary of any claim of testing that can’t be matched to a batch.
A Checklist for Reading Any Supplement Label
- Active and form: “magnesium glycinate 500mg” tells you more than “magnesium 500mg”.
- Amount per capsule and per serve: check how many capsules make one serve.
- Extract ratio: if you see “equivalent to”, find the actual extract amount.
- Serves per bottle: divide the price by the serves to get the true daily cost.
- Other ingredients: every filler, capsule material and additive should be listed.
- Directions and warnings: a good label tells you when and how to take it and who shouldn’t.
- Batch number and expiry: you need these to match any certificate of analysis.
- Who stands behind it: a returns policy and a way to contact the seller.
Our longer guide on what to look for on a supplement label in Australia works through real examples of fillers and misleading doses.
Our Range, Label by Label
Here is the same information for Eternal Elixir’s capsule products, taken from our labels and product pages. Prices are as of Sep 2026, and the cost per serve is the bottle price divided by the serves.
| Product | Active per capsule or serve | Capsules | Label serve | Serves | Price (AUD) | Per serve |
|---|---|---|---|---|---|---|
| NMN 500mg | 500mg NMN per capsule | 90 | 1 capsule | 90 | $59.99 | $0.67 |
| Pure NR 500mg | 500mg NR per capsule | 90 | 1 capsule | 90 | $59.99 | $0.67 |
| Ca-AKG 500mg | 500mg per serve | 90 | 1 capsule | 90 | $59.99 | $0.67 |
| TUDCA 500mg | 500mg per capsule | 90 | 1 capsule with a meal | 90 | $59.99 | $0.67 |
| Spermidine 10mg | 10mg per capsule | 90 | 1 capsule with a meal | 90 | $49.99 | $0.56 |
| Trans-Pterostilbene 500mg | 500mg per serve | 90 | 1 capsule | 90 | $64.99 | $0.72 |
| Berberine HCl 500mg | 500mg of a 20:1 extract per capsule | 90 | 1 capsule, empty stomach | 90 | $49.99 | $0.56 |
| Trans-Resveratrol | 600mg trans-resveratrol per capsule | 90 | 2 capsules (1,200mg) | 45 | $59.99 | $1.33 |
| Shilajit 1000mg | 1,000mg of 20:1 extract (20% fulvic acid) per 2 capsules | 90 | 2 capsules, empty stomach | 45 | $44.99 | $1.00 |
| Korean Panax Ginseng | 1,600mg per serve | 90 | 2 capsules | 45 | $44.99 | $1.00 |
| Reduced L-Glutathione | 2,000mg per 2-capsule serve | 90 | 2 capsules | 45 | $39.99 | $0.89 |
| Tongkat Ali 200:1 | 2,000mg per 3-capsule serve | 90 | 3 capsules | 30 | $39.99 | $1.33 |
| TMG 2000mg | 2,000mg per 3-capsule serve | 90 | 3 capsules with a meal | 30 | $44.99 | $1.50 |
| Methylene Blue Capsules | 10mg per capsule | 60 | 1 capsule | 60 | $59.99 | $1.00 |
Add NMN 500mg to cart · $59.99
What the table shows, good and bad
- Most bottles hold 90 capsules. Where the serve is one capsule, that is three months of use per bottle.
- Not every product is one a day. Resveratrol, shilajit, ginseng and glutathione are two-capsule serves (45 serves). Tongkat ali and TMG are three-capsule serves (30 serves); our tongkat ali guide covers what that 2,000mg serve of a 200:1 extract means for dosing and buying. Methylene blue comes in a 60-capsule bottle.
- We list the fillers. Several of our capsules, including NMN, NR and Ca-AKG, contain rice flour, and our shilajit capsules contain magnesium stearate and silica. You’ll find each ingredient list on the product page.
- The dose on the front is the dose you take. Where a figure is an extract ratio or a multi-capsule serve, the product page says so.
What Makes Eternal Elixir Different
We don’t claim secret ingredients or a formula nobody else can buy. Several of the actives we sell are also sold by other Australian brands. What we offer is a straightforward buying experience built around facts you can check:
- Clear doses: the amount per capsule and per serve on every product page, with extract ratios explained.
- Bigger bottles: 90 capsules on most products, where many pharmacy packs hold 30.
- Full ingredient lists: fillers and capsule materials included.
- Local dispatch: orders ship from Sydney within 24 hours, and shipping is free over $100.
- A guarantee: 30-day money-back guarantee, and Afterpay if you want to spread the cost.
- Multi-bottle savings: two, three or five bottles of the same product save 10%, 15% or 20%.
Our Eternal Elixir overview covers the full range, prices and buying notes in one place. If you are building a routine from several products, our guide to building a complete longevity stack shows how they fit together, and you can browse everything in our shop.
Label Directions Come First
Quality also means taking a product the way its label says. Keep to the label serve for each product in the table above, and talk to your doctor before starting any supplement if you are pregnant or breastfeeding, take prescription medicine or have a medical condition. Some products carry their own cautions: methylene blue, for example, is not for anyone taking serotonergic medicines, and our berberine and shilajit labels say to take them on an empty stomach.
The Bottom Line
A high-quality supplement tells you the form and amount of each active, the serve, the serves per bottle and every other ingredient, and its seller can match any testing claim to your batch. Eternal Elixir publishes those details for every product, sells most of them in 90-capsule bottles and backs them with a 30-day money-back guarantee. If you want to start with one product, our NMN 500mg is a good example of how we label and price.
Frequently Asked Questions
What should I look for on a supplement label?
Check the active ingredient and its form, the amount per capsule and per serve, the number of serves, every other ingredient, the directions and warnings, and a batch number and expiry date. If the label shows an “equivalent to” figure, find the actual extract amount.
Add NMN 500mg to cart · $59.99
Are all supplement brands tested the same way?
No. Testing ranges from a manufacturer’s own checks to independent certification programmes, and the programmes themselves differ in what they test. Ask the seller for a certificate of analysis that matches the batch number on your bottle.
Why do some supplements cost more than others?
Differences in ingredient form, dose per serve, bottle size and testing all affect price. Compare the price per serve rather than per bottle: a cheap bottle with a three-capsule serve can cost more per day than a dearer one with a one-capsule serve.
Do Eternal Elixir capsules contain fillers?
Some do, and we list them. Several of our capsules contain rice flour, and our shilajit capsules contain magnesium stearate and silica. Each product page shows the full ingredient list.
How many serves are in an Eternal Elixir bottle?
It depends on the product. One-capsule products such as NMN, NR, Ca-AKG, TUDCA and spermidine give 90 serves. Two-capsule products give 45 and three-capsule products give 30. Our methylene blue capsules give 60.
Sources
- Firoz M, Graber M. Bioavailability of US commercial magnesium preparations. Magnesium Research. 2001;14(4):257-262. PubMed 11794633
- Blancquaert L, Vervaet C, Derave W. Predicting and testing bioavailability of magnesium supplements. Nutrients. 2019;11(7):1663. PubMed 31330811
- Eichner AK, Coyles J, Fedoruk M, et al. Essential features of third-party certification programs for dietary supplements: a consensus statement. Current Sports Medicine Reports. 2019;18(5):178-182. PubMed 31082891
- Eternal Elixir product pages and labels (doses, capsule counts, directions, ingredients and prices), linked in the table above.
