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NOW Foods vs Life Extension Taurine (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
NOW Foods still edges Life Extension on our rubric (85 against 84 on our 0-100 execution score) and is still the cheaper of the two, at about $0.16 per 2.25g daily dose against Life Extension's $0.24. The gap narrowed sharply in 2026 though: NOW rose 45% while Life Extension fell 24%, so a cost difference that used to be nearly 3x is now about 1.5x. Both deliver the same free-form taurine at the same 1,000mg dose.
Life Extension publishes COAs on its website and uses a vegetarian capsule; NOW Foods brings its established GMP testing and a far larger 250-count bottle. In our view NOW Foods remains the pick on both score and cost, but Life Extension is now close enough that its published COAs are a fair reason to choose it instead.
Taurine 1,000mg Double Strength
NOW Foods
Taurine 1,000mg
Life Extension
Head-to-Head Comparison
| Category | Taurine 1,000mg Double Strength NOW Foods | Taurine 1,000mg Life Extension |
|---|---|---|
| Brand Score | 85/100Winner | 84/100 |
| Dosing & Form | 25/25Winner | 25/25 |
| Purity | 19/25Winner | 19/25 |
| Value | 20/25Winner | 19/25 |
| Transparency | 21/25Winner | 21/25 |
| Cost/Day | $0.16Winner | $0.24 |
| Price checked | 2026-08-07 | 2026-08-07 |
| Dose/Serving | 1000mg | 1000mg |
| Form | Free-form L-taurine, vegetable capsule | Free-form L-taurine, vegetarian capsule |
| Third-Party Tested | No | ✓ Yes |
| Proprietary Blend | No | No |
Why This Comparison Matters
NOW Foods and Life Extension both make a straightforward 1000mg free-form taurine at a value price. Taurine is a simple, single amino acid, so the active ingredient is identical and the decision comes down to cost per dose and testing. NOW Foods brings its long-standing GMP program; Life Extension publishes COAs on its website.
Both deliver the same 1000mg dose in free-form taurine. With a commodity amino acid, purity, an honest label, and price are what matter.
We scored both on evidence, quality, cost per dose, and transparency.
Detailed Score Breakdown
Taurine 1,000mg Double Strength
NOW Foods
Free-form L-taurine at the 1,000mg cap size used across multiple clinical trials
NOW Foods runs an NPA A-rated, GMP-certified facility with documented in-house identity, potency, and contaminant testing
$0.16 per 2.25g daily dose at the 250-cap size, the highest-scoring capsule here even after a 2026 price rise
NOW lists per-capsule taurine content, vegetarian capsule shell, and carries no proprietary blends
NOW Foods is the default capsule pick for taurine when balancing price, dose convenience, and brand quality history
Taurine 1,000mg
Life Extension
Free-form L-taurine at 1,000mg, marketed for cardiovascular and longevity support per recent Singh 2023 research
Life Extension contracts with GMP-certified manufacturers and publishes COAs on its website for most SKUs
$0.24 per 2.25g daily dose at the 90-cap size after a 24% price drop, now mid-pack rather than premium
Life Extension publishes COAs and lists vegetarian capsule shell, taurine dose, and excipients clearly
Life Extension is the brand most likely to lean into the longevity angle in marketing, but the underlying product is a clean single-ingredient capsule
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
More Taurine Comparisons
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.