Ingredient & formula quality
Dose suitability, formula clarity, additives, sugars and evidence-based supporting ingredients.
SUPPLEMENT INDEX PUBLISHED METHODOLOGY
One category.
Two separate rankings.
Hydrolysed collagen peptides use gram-dose comparisons. Undenatured Type II capsules use milligram daily-dose comparisons. Their value rankings never cross.
Scoring logic last reviewed 3 Oct 2026. Each product shows its own record review date.
Hydrolysed Collagen Peptides
Value / comparable amount
Comparable cost per 10 g of disclosed collagen, assessed alongside dose relevance. This is a price unit, not an effective-dose claim.
Source, type & transparency
Source, type, origin, manufacture, traceability and relevant disclosures.
Evidence & testing
Ingredient relevance, claim quality and disclosed exact-product or third-party testing.
User rating
A product rating counts from 20 reviews. Missing ratings are excluded and the other four category weights are redistributed proportionally.
Undenatured Type II Capsules
Ingredient & formula quality
The undenatured Type II ingredient and daily milligram dose are assessed against evidence for that exact form.
Value / comparable amount
Cost is calculated per evidence-relevant daily capsule dose—not per gram and never against powders.
Source, type & transparency
Type II source, branded ingredient, origin, manufacture, traceability and relevant disclosures.
Evidence & testing
Form-specific evidence, dose match, claim quality and disclosed exact-product or third-party testing.
User rating
A product rating counts from 20 reviews. Missing ratings are excluded and the other four category weights are redistributed proportionally.
Relevant dose and currency
Hydrolysed costs are normalised to a comparable 10 g of actual collagen; undenatured Type II uses the relevant daily capsule dose. The 10 g unit is a comparison tool, not a dosing recommendation. Existing Value sub-scores are editorial inputs, not automatically calculated from price. Earlier NZ$ figures entered those assessments without a documented A$ conversion formula. We now display both NZ$ and indicative A$ at A$1 = NZ$1.2391 (RBA, 28 Sep 2026); NZ products receive provisional, Low-confidence scores with 0/25 Value contribution until their A$-normalised Value assessments are completed. Missing Value is not redistributed to other categories. Shipping is excluded.
Joint products
Hydrolysed peptides are assessed in grams, and undenatured Type II in milligrams. Generic hydrolysed products without named, joint-relevant research are capped at 4/15 for Evidence & testing and 12/25 for Value. The same pack can therefore receive different goal-specific scores; the Bulk Nutrients beauty and joint records explain this distinction.
20 reviews, then confidence adjustment
A usable exact-product star rating needs at least 20 reviews. For each ranking system, the median is calculated from usable rated products, counting a pack with two goal assessments once. The current hydrolysed median is 4.90 stars; the current undenatured median is 4.80 stars. Adjusted stars = (review count × raw stars + 25 × median stars) / (review count + 25). The adjusted stars contribute up to 10 points. With no usable rating, User rating is not scored and the other four category scores are multiplied by 100/90. A review count without stars is a data gap. Ratings measure customer experience, not clinical effectiveness; source and capture date are shown per product, or marked Not yet checked.
Incomplete records receive provisional scores
All catalogued products can appear in the ranked list. Unresolved dose, label, price or Value assessments make a score provisional and its record confidence Low. Value contributes 0/25 until the issue is resolved: this withholds credit rather than judging the product poor value. The missing Value weight is not redistributed. Brand-stated unverified doses remain flagged and Ingredient & formula quality is capped at 24/30. Other category assessments remain editorial inputs, not laboratory measurements. Provisional ranks can change substantially when information is confirmed.
Confidence in the record
We use the Protein Index’s High, Medium and Low labels. Low means a scoring-critical dose, label, price or Value input is unresolved; these assessments are provisional. Medium means the critical inputs are resolved but raw-material origin, final manufacture, testing documentation or an attributable customer rating is incomplete. High requires those record checks to be complete, including a disclosed testing status and a usable exact-product rating. This describes support for the assessment, not clinical evidence strength, safety, effectiveness or a probability of success. A trademark alone earns no confidence upgrade. Each product lists its gaps.
Describe what was actually checked
The filter distinguishes Third-party tested (disclosed), Testing partly disclosed, No testing disclosed, and Not yet checked. A branded clinical ingredient is not a batch test. “No testing disclosed” is used only after both the exact product page and brand site have been checked; no current record meets that documented standard. A disclosure is not independent verification of every batch.
Facts instead of implied outcomes
Short descriptors use the recorded dose, collagen type and format. They summarise label facts and do not make therapeutic claims. Where the label amount is unverified, the descriptor says so.
≤2% receives no penalty
We do not reward “zero sugar” marketing. Unsweetened formulas score well; naturally derived sweeteners are preferred where needed; artificial sweeteners receive a small deduction and high added sugar a larger one.
Affiliate relationships do not enter the formula
Affiliate partners are labelled beside their records. The same data-quality, rating, dose and pending rules apply to every brand. Commission, referral arrangements and reader discounts are not scoring inputs.
Local channel and shipping are separate facts
Products need an official AU/NZ store, established local distributor or reputable local retail channel. The site currently records local channels, but shipment to Australia and New Zealand has not been confirmed for each SKU; those indicators say Not yet checked.
Rating sensitivity check
Among the 24 currently scored hydrolysed assessments, excluding User rating for everyone and rescaling the four other categories gives this top five. Provisional products are included in both orders, with unresolved Value points withheld.
- Luvin Life — Beauty Boost Collagen — 450 g: 87/100
- Luvin Life — Joint Support Collagen — 450 g: 87/100
- Nutra Naturals — Collagen Beauty — Unflavoured 672 g: 84/100
- Protein Supplies Australia — Collagen Peptides Pure — Unflavoured 500 g: 83/100
- Bulk Nutrients — Collagen Protein — Raw 750 g: 82/100
Luvin Life Joint Support Collagen — 450 g: 1 → 2; Luvin Life Beauty Boost Collagen — 450 g: 2 → 1; Protein Supplies Australia Collagen Peptides Pure — Unflavoured 500 g: 5 → 4. These positions are calculated from the current product records, and can change as unresolved data is verified. The undenatured ranking contains 2 assessments. Its usable customer ratings are handled by the same adjustment rule.
Evidence foundations
The framework distinguishes collagen forms because published research uses different doses and mechanisms. It does not present supplements as medical treatment.
RBA daily exchange rates (A$/NZ$, 28 Sep 2026) ↗Review: collagen supplementation for joint health ↗Study: 40 mg undenatured Type II ↗Harvard Nutrition Source: collagen ↗General comparison information only. Scores reflect recorded inputs and the published framework, not clinical recommendations or guarantees. Check each product’s Last reviewed date.