Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) vs Collagen Unflavoured 320g

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) and Collagen Unflavoured 320g.

Last verified: 07 Apr 2026 · Based on 29 reviews

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Quick Answer

Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) scores 82/100 vs Collagen Unflavoured 320g at 70.0/100. Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) wins on effectiveness, ingredient quality, value for money.

Which is better: Advanced Hydrolysed Marine ... or Collagen Unflavoured 320g?

Known Nutrition's liquid collagen (82/100) beats Optimum Nutrition's collagen powder (70/100) on skin and hair improvement. It costs £64.99 per supply versus £16.00. Pick Optimum Nutrition if budget is tight — it still supports joint comfort and dissolves smoothly in drinks.

— AIScored Editorial Team

How Do the Scores Compare?

Advanced Hydrolysed Marine ...

Collagen Unflavoured 320g

	Advanced Hydrolysed Marine ... Known Nutrition	Collagen Unflavoured 320g Optimum Nutrition
Overall Score	82	70.0
Effectiveness	83.0/100 Best	71.0/100
Ingredient Quality	83.0/100 Best	75.0/100
Value for Money	69.0/100 Best	62.0/100
Side Effects	91.0/100 Best	82.0/100
Certifications	100/100 Best	40.0/100
Best Price	£64.99 Known Nutrition →	£16.00 Holland & Barrett → Cheapest
Form	liquid	Powder
Dose	None	None
Third-Party Tested	✓ Yes	✗ No
Reviews Analysed	16	13

Advanced Hydrolysed Marine Liqui...

Pros

✓5000mg hydrolysed marine collagen at a clinically relevant dose, with liposomal delivery claimed to enhance absorption
✓Strong positive feedback on skin plumpness, fine line reduction, and hydration — multiple reviewers report results within 4 weeks
✓Hair thinning and dullness improvements noted, particularly by perimenopausal users
✓Synergistic formula: Vitamin C (cofactor for collagen synthesis), pine bark extract (antioxidant), bilberry, Vitamin E, and A

Cons

✗Redesigned sachet format widely criticised: leaking, difficult to fully empty, and inconvenient — drove two 1-star reviews from previously loyal customers
✗Price has increased while some reviewers feel pack size has decreased, reducing perceived value
✗One reviewer found the taste artificial; subjective but relevant given the liquid format
✗Short-term users (under 1 week) report no results yet, which is expected but may disappoint those seeking rapid outcomes

Best For

Women over 40 or in perimenopause seeking skin and hair support Those who struggle to swallow capsules and prefer a liquid format Couples or household members sharing a monthly supply Consumers prioritising certified, UK-manufactured supplements Anyone wanting a collagen product with supporting antioxidant co-factors built in

Known Nutrition £64.99

View full review →

Collagen Unflavoured 320g

Pros

✓Dissolves completely in hot or cold drinks with minimal impact on taste or smell — repeatedly confirmed across reviews
✓Generous 20g hydrolysed collagen dose per serving with synergistic Vitamin C already included, removing the need for a separate supplement
✓Multiple reviewers report noticeable improvements in joint comfort, post-workout recovery, skin, and hair quality
✓Trusted Optimum Nutrition brand with consistent quality; comes with a convenient measuring scoop

Cons

✗A minority of users detect a distinct chemical-like taste or smell, especially noticeable in lighter drinks
✗No third-party testing or informed-sport certification disclosed — relevant for competitive athletes
✗Higher price per 100g compared to many competing collagen powders; at 20g/day the tub yields roughly 16 servings
✗Noticeable results are not universal — some users report no change after 4 weeks, likely because collagen typically requires 8–12 weeks to show measurable skin or joint effects

Best For

Adults seeking joint comfort support during or after regular exercise Women over 30 looking to support skin elasticity, hair strength, and nail condition Coffee and tea drinkers who want an unflavoured, low-prep supplement Active individuals already using protein or creatine who want to conveniently stack collagen

Holland & Barrett £16.00 Amazon UK £19.26

View full review →

What does the data say about Advanced Hydrolysed Ma... vs Collagen Unflavoured 320g?

Known Nutrition's Advanced Hydrolysed Marine Liquid Collagen Couples Supply (£64.99, 82/100) and Optimum Nutrition's Collagen Unflavoured 320g (£16.00, 70/100) differ fundamentally in form and delivery. The Known Nutrition product provides 5000mg marine collagen in liquid with liposomal delivery claiming enhanced absorption. Optimum Nutrition's powder comes with added Vitamin C and mixes into hot or cold drinks. The liquid suits those struggling with capsules; the powder appeals to coffee drinkers who want minimal fuss.

On performance, Known Nutrition scores higher for ingredient quality (83/100 vs 75/100) and delivers visible results—reviewers report skin plumpness and fine line reduction within four weeks. However, the redesigned sachet packaging leaks and frustrates users trying to fully empty it, eroding the premium positioning. Optimum Nutrition costs a third the price and performs reliably for joint comfort and post-workout recovery, with Vitamin C already included. A minority detect chemical taste in lighter drinks, but dissolving remains excellent.

Known Nutrition carries third-party testing; Optimum Nutrition doesn't. Choose Optimum Nutrition if budget matters or you value daily mixing flexibility. Pick Known Nutrition if you're over 40, seeking intensive skin support, and tolerate packaging inconvenience for superior marine collagen dose.

Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) Winner 82/100

Known Nutrition's Advanced Marine Liquid Collagen delivers 5000mg of hydrolysed marine collagen per 15ml sachet, enhanced with liposomal technology, Vitamin C, pine bark extract, and bilberry.

Effectiveness

Advanced Hydroly..

83.0/100

Collagen Unflavo..

71.0/100

Ingredient Quality

Advanced Hydroly..

83.0/100

Collagen Unflavo..

75.0/100

Value for Money

Advanced Hydroly..

69.0/100

Collagen Unflavo..

62.0/100

Side Effects

Advanced Hydroly..

91.0/100

Collagen Unflavo..

82.0/100

Certifications

Advanced Hydroly..

100/100

Collagen Unflavo..

40.0/100

What are the key differences?

Advanced Hydrolysed Mar.. is best for: Women over 40 or in perimenopause seeking skin and hair support, Those who struggle to swallow capsules and prefer a liquid format

Collagen Unflavoured 320g is best for: Adults seeking joint comfort support during or after regular exercise, Women over 30 looking to support skin elasticity, hair strength, and nail condition

Frequently Asked Questions

Which is better, Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) or Collagen Unflavoured 320g? ▼

Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) scores 82/100 overall while Collagen Unflavoured 320g scores 70.0/100. Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) comes out ahead, scoring higher on effectiveness (83.0 vs 71.0). Advanced Hydrolysed Marine Liq is best suited for Women over 40 or in perimenopause seeking skin and hair support and Those who struggle to swallow capsules and prefer a liquid format. Collagen Unflavoured 320g is better for Adults seeking joint comfort support during or after regular exercise and Women over 30 looking to support skin elasticity, hair strength, and nail condition.

Is Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) worth the price compared to Collagen Unflavoured 320g? ▼

Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) costs £64.99 while Collagen Unflavoured 320g is £16.00. For value, Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) scores 69.0/100 vs Collagen Unflavoured 320g's 62.0/100. Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) delivers better value relative to its quality. Note that Advanced Hydrolysed comes as liquid while Collagen Unflavoured 320g is powder, which may affect your preference.

Which has fewer side effects? ▼

Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply) scores 91.0/100 for side effects (higher means fewer reported issues) while Collagen Unflavoured 320g scores 82.0/100. Reviewers report fewer side effects with Advanced Hydrolysed Marine Liquid Collagen Couples Supply (2x 28-Day Supply). For certification and testing, Advanced Hydrolysed scores 100/100 vs Collagen Unflavoured 320g's 40.0/100. Always consult a healthcare professional before starting any supplement.