Thorne Amino Complex vs NOW Foods Glycine
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Thorne Amino Complex and NOW Foods Glycine.
Last verified: 01 Mar 2026 · Based on 88 reviews
Our Verdict: Thorne Amino Complex or NOW Foods Glycine?
Thorne Amino Complex wins overall with an 80 vs 78 score, justified by its complete EAA profile and NSF Certified for Sport status — critical for drug-tested athletes. NOW Foods Glycine is the better pick for budget-conscious buyers focused solely on sleep quality or collagen support, delivering exceptional value at over 150 therapeutic doses per tub.
— AIScored Editorial Team
Thorne Amino Complex scores 80.0/100 vs NOW Foods Glycine at 78.0/100. Thorne Amino Complex wins on effectiveness, ingredient quality, certifications. NOW Foods Glycine is stronger on value for money.
Thorne Amino Complex vs NOW Foods Glycine: What Does the Data Say?
Thorne Amino Complex (£42.99, 80/100) and NOW Foods Glycine Pure Powder (78/100) serve genuinely different purposes despite both sitting in the amino acids category. Thorne delivers a complete essential amino acid formula — all nine EAAs with leucine-forward ratios aligned to muscle protein synthesis research — at 5.14g per serving. Glycine Pure Powder does exactly what the name says: one ingredient, nothing else, at 1g per serving. These products are not comparable in any functional sense; one is a broad-spectrum recovery supplement, the other is a targeted single-amino intervention.
If you train regularly and want clean, NSF Certified for Sport coverage of all essential amino acids, Thorne is the better choice — that certification matters particularly for drug-tested athletes. At £42.99 for 30 servings, the 62/100 value score is honest. Glycine's 88/100 value is easier to justify: a 454g tub gives over 150 therapeutic three-gram sleep doses, making it genuinely economical for that specific purpose.
Practically, note that Glycine's label shows 1g servings, so you need three scoops to reach the clinically studied dose — not clearly flagged. Thorne's flavour divides opinion; some find it sweet or slightly bitter. Both are third-party tested, and Thorne's formulation uses only stevia and fruit/vegetable juice for flavouring.
How Do the Scores Compare?
Thorne Amino Complex
Thorne
|
NOW Foods Glycine Pure Powder
NOW Foods
|
|
|---|---|---|
| Overall Score | 80.0 | 78.0 |
| Effectiveness |
78.0/100
Best
|
68.0/100 |
| Ingredient Quality |
91.0/100
Best
|
84.0/100 |
| Value for Money | 62.0/100 |
88.0/100
Best
|
| Side Effects |
91.0/100
Best
|
91.0/100
Best
|
| Certifications |
94.0/100
Best
|
77.0/100 |
| Best Price |
£42.99
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Cheapest
|
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| Price per Serving | £1.43 30 servings | N/A |
| Form | Powder | Powder |
| Dose | 5.14g essential amino acids per serving | 1000mg glycine per serving |
| Third-Party Tested | ✓ Yes | ✓ Yes |
| Reviews Analysed | 68 | 20 |
Thorne Amino Complex
Pros
- ✓Complete EAA profile covering all nine essential amino acids with leucine-forward ratios aligned to muscle protein synthesis research
- ✓NSF Certified for Sport — independently verified for banned substances, making it safe for competitive and drug-tested athletes
- ✓Exceptionally clean formulation: stevia and fruit/vegetable juice only, no artificial sweeteners, colours, or preservatives
- ✓Reviewers consistently report tangible recovery benefits — faster reduction in muscle soreness and sustained energy through later sessions
Cons
- ✗Price is the most recurring complaint — 30 servings runs out fast for daily or twice-daily users and the cost is high relative to unflavoured EAA alternatives
- ✗Flavour divides opinion: a meaningful minority find it overly sweet or detect a slightly bitter, medicinal undertone
- ✗Leucine dose at 2000 mg per serving is effective but on the conservative end; athletes prioritising maximal MPS stimulation may prefer higher-leucine formulations
- ✗Tub size (228 g / 30 servings) feels small for the premium price, which limits accessibility for budget-conscious buyers
Best For
NOW Foods Glycine Pure Powder
Pros
- ✓Genuinely pure single ingredient — no fillers, binders, or additives of any kind
- ✓Outstanding value: 454 g tub provides 151+ full therapeutic (3 g) sleep doses
- ✓GMP-certified and NPA A-rated manufacturing with third-party testing
- ✓Mildly sweet natural taste makes it easy to mix into water or a drink
Cons
- ✗Each serving is only 1 g — the clinically studied sleep dose (3 g) requires three scoops, which is not clearly flagged on the label
- ✗General NOW Foods quality concerns circulate on Reddit (notably regarding their magnesium glycinate), creating brand-level uncertainty even where product-specific evidence is absent
- ✗Authenticity questions raised by at least one long-term user who noticed label variation between batches purchased online
- ✗Powder format is less convenient than capsules for on-the-go use
Best For
Score Breakdown: Thorne Amino Complex vs NOW Foods Glycine
Thorne Amino Complex is a premium essential amino acid powder that iHerb reviewers consistently praise for supporting workout recovery, reducing post-exercise muscle soreness, and sustaining training energy.
What are the key differences?
Frequently Asked Questions
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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