💪 CREATINE PURITY GUIDE 2026

Best Clean Creatine 2026: NSF & Third-Party Tested Brands Ranked

Published January 6, 2026 | Creatine Safety | Third-Party Testing | Contamination Analysis

Not all creatine is created equal. While creatine monohydrate is one of the most studied supplements in sports nutrition, low-quality manufacturing can introduce dangerous contaminants like dicyandiamide (converts to cyanide in your stomach), dihydrotriazine (suspected carcinogen), and heavy metals. This guide ranks 15+ verified-clean creatine brands by third-party testing, purity standards, and value—so you can supplement safely without the hidden risks.

📊 What's Inside This Guide:

15+

Verified-Clean Brands Ranked

30+

NSF Certified Options

3

Contamination Types Explained

$0.13

Cheapest Verified-Safe Option

Part 1: Why Creatine Purity Matters (The Hidden Contamination Crisis)

Creatine monohydrate has decades of research proving its safety and effectiveness for muscle growth, strength gains, and cognitive function. But here's what most people don't know: the manufacturing process for creatine can introduce dangerous chemical byproducts that have nothing to do with creatine itself.

Unlike protein powder (where heavy metals come from contaminated ingredients), creatine contamination comes from incomplete chemical synthesis. When manufacturers cut corners or use outdated production methods, three major contaminants can appear in your creatine:

The 3 Contaminants Hiding in Low-Quality Creatine

⚠️ Contamination #1: Dicyandiamide (DCD)

What it is: A toxic byproduct formed from cyanamide (a creatine precursor) during synthesis. DCD indicates an incomplete or inefficient chemical manufacturing process.

Why it's dangerous:

The problem: There are NO agreed-upon international standards for safe DCD levels in supplements. The European Commission has published guidelines for milk powder contamination, but nothing specific to creatine supplementation.

Bottom line: If DCD is detectable in your creatine, it means the manufacturing process failed. High-quality creatine should have DCD levels below analytical detection limits.

⚠️ Deep-dive on DCD contamination: Dicyandiamide (DCD) converts to hydrogen cyanide in your stomach and has been found in over 40% of generic creatine samples. Read our complete DCD contamination guide to learn which brands test DCD-free.

⚠️ Contamination #2: Dihydrotriazine (DHT)

What it is: An organic impurity formed during chemical synthesis of creatine from raw materials like sarcosine and cyanamide. (Note: This is NOT the same as the hormone DHT from testosterone metabolism.)

Why it's dangerous:

Safe limits (EFSA guideline): The European Food Safety Authority recommends a maximum of 3 mg/kg (3 parts per million) for DHT in creatine products.

⚠️ Real-world contamination: Testing of generic creatine products has found DHT levels as high as 110 mg/kg—more than 35 times the recommended maximum. High-quality manufacturers like Creapure® (Germany) consistently achieve "non-detected" DHT levels.

Wondering if German Creapure justifies the premium? See our Creapure vs Regular Creatine comparison with DHT contamination data.

⚠️ Contamination #3: Creatinine (Quality Indicator)

What it is: The metabolic waste product from creatine breakdown. In your body, creatine naturally breaks down into creatinine, which your kidneys filter out.

Why it appears in supplements:

Is it dangerous? Not directly toxic like DCD or DHT, but high creatinine levels mean you're paying for useless filler instead of active creatine. It's a red flag for overall product quality.

What to look for: High-purity creatine should be ≥99.9% creatine monohydrate, with creatinine levels below 100 ppm (parts per million).

How These Contaminants End Up in Your Creatine

Creatine monohydrate is synthesized through a multi-step chemical process:

  1. Step 1: Sarcosine (an amino acid derivative) reacts with cyanamide
  2. Step 2: This creates creatine through a series of chemical reactions
  3. Step 3: The raw creatine is purified to remove byproducts
  4. Step 4: Final product is dried and micronized into powder

Where contamination happens:

✅ The Solution: Third-Party Testing & Premium Manufacturing

Two ways to ensure you're getting clean creatine:

1. Third-party certification (batch testing):

2. Premium manufacturing standards:

Part 2: Understanding Creatine Certifications (What Actually Matters)

The supplement industry is full of marketing buzzwords and meaningless certifications. When it comes to creatine purity, only three things actually matter:

  1. Is every batch tested by an independent third party?
  2. What contaminants are they testing for?
  3. Are the test results publicly available?

Here's how the major certifications stack up:

🥇 Gold Tier: NSF Certified for Sport

NSF Certified for Sport

What it tests for:

Testing frequency: Every production batch tested before release

Who needs this:

Cost premium: NSF certified creatine typically costs $0.40-0.50 per serving vs $0.13-0.26 for non-certified. Worth it if you're taking this daily for months/years.

Competitive athletes have specific compliance requirements. Read our complete NSF Certified Creatine Athletes Guide covering NCAA, Olympic, and professional league requirements.

🥈 Silver Tier: Informed Choice / Informed Sport

Informed Choice & Informed Sport

What it tests for:

Testing frequency:

Who needs this:

Cost: Similar pricing to NSF ($0.35-0.45 per serving). Good middle ground between price and verification.

🥉 Bronze Tier: Creapure® Ingredient

Creapure® (Premium German Manufacturing)

What it is: Creapure® isn't a certification—it's a trademarked creatine monohydrate manufactured by AlzChem Group in Germany. Think of it like "Intel Inside" for creatine.

Why it matters:

Who needs this:

💡 Pro tip: The BEST creatine has Creapure® + NSF/Informed Choice certification. You get premium German manufacturing AND independent batch testing. Brands like Momentous and Bare Performance Nutrition offer this combo.

⚠️ Red Flag Tier: No Certification

Generic Creatine Monohydrate (No Third-Party Testing)

What you're getting:

Why some people still buy it: It's cheap ($0.10-0.15 per serving). But you're gambling with your health.

The math: Saving $0.10 per serving = $36/year. Is $36 worth the risk of consuming carcinogens daily? Probably not.

Quick Decision Tree: Which Certification Do You Need?

Are you a competitive athlete subject to drug testing?

→ YES: You MUST use NSF Certified for Sport or Informed Sport. Non-negotiable.

→ NO: Continue below...

Do you want the absolute highest purity available?

→ YES: Look for Creapure® + NSF/Informed Choice combo

Examples: Momentous, Bare Performance Nutrition, Dymatize (Europe)

→ NO: Continue below...

Are you on a tight budget but want verification?

→ YES: BulkSupplements Creatine ($0.13/serving + NSF Certified)

This is the sweet spot: verified-clean at generic pricing

→ NO: Pick any NSF or Informed Choice brand from our rankings below

Now that you understand WHY purity matters and WHICH certifications to trust, let's rank the 15+ best verified-clean creatine brands by safety, value, and effectiveness...

Part 3: Top 15 Verified-Clean Creatine Brands (Ranked by Safety + Value)

We analyzed 30+ NSF Certified brands, 63 Informed Choice brands, and 30+ Creapure manufacturers to identify the cleanest creatine options at every price point. Here's how we ranked them:

🏆 Ranking Criteria:

🥇 The Rankings: Best Clean Creatine 2026

Rank Brand Certification $/Serving Best For
🥇 #1 BulkSupplements Creatine Monohydrate NSF CERTIFIED $0.13 Best Overall Value
🥈 #2 NOW Sports Creatine Monohydrate INFORMED CHOICE $0.19 Best Budget + Quality Balance
🥉 #3 Optimum Nutrition Micronized Creatine INFORMED CHOICE $0.22 Most Popular Brand
#4 Jacked Factory Creatine Monohydrate INFORMED CHOICE $0.41 Clean Label Focus
#5 MuscleTech Platinum Creatine HPLC TESTED $0.41 Trusted Mainstream Brand
#6 Thorne Creatine NSF CERTIFIED $0.48 Best Premium Option
#7 Legion Athletics Creatine+ NSF CERTIFIED $0.50 Added Electrolytes
#8 Myprotein Creatine (with Creapure) IC + CREAPURE $0.25 Best Value + German Purity
#9 Dymatize Creatine Monohydrate INFORMED CHOICE $0.30 Europe Market Leader
#10 Vega Sport Creatine Monohydrate INFORMED CHOICE $0.55 Vegan-Certified

Detailed Brand Breakdowns

🥇 #1: BulkSupplements Creatine Monohydrate

Certification: NSF Certified for Sport

Price: $26.97 for 200 servings = $0.13/serving

Purity: 99.99% creatine monohydrate

Why it's #1:

The catch: Unflavored only (but that's actually a good thing - flavoring adds cost and potential contaminants). Mix with juice or your protein shake.

💡 Bottom line: This is the creatine we recommend to 90% of people. NSF certified quality at generic pricing. You literally cannot beat this value proposition.

Buy BulkSupplements Creatine on Amazon →

🥈 #2: NOW Sports Creatine Monohydrate

Certification: Informed Choice

Price: $37.16 for 200 servings = $0.19/serving

Purity: 99.9% creatine monohydrate

Why it's #2:

Best for: People who want verified-clean creatine without spending premium prices. Perfect middle ground between BulkSupplements (#1) and Thorne (#6).

Buy NOW Sports Creatine on Amazon →

🥉 #3: Optimum Nutrition Micronized Creatine

Certification: Informed Choice

Price: $25.99 for 120 servings = $0.22/serving

Purity: 99.9% creatine monohydrate (micronized)

Why it's #3:

Why not #1? Slightly more expensive than BulkSupplements and NOW Sports for the same certification level. You're paying a small premium for the Optimum Nutrition brand name.

Best for: People who want a trusted household name with verified testing. If you've used ON Gold Standard Whey, this is the creatine equivalent.

Buy Optimum Nutrition Creatine on Amazon →

🏆 #6: Thorne Creatine (Best Premium Option)

Certification: NSF Certified for Sport

Price: $82.00 for 180 servings = $0.46/serving

Purity: 99.99% creatine monohydrate

Why it's premium:

Worth the premium? If you're a competitive athlete who MUST avoid banned substances, yes. If you're taking creatine daily for years and want maximum peace of mind, yes. If you're budget-conscious, stick with BulkSupplements (#1).

Best for: Professional/NCAA athletes, people who want the absolute best regardless of price, anyone who values Thorne's medical-grade reputation.

Buy Thorne Creatine on Amazon →

Wondering if Thorne justifies the premium vs budget NSF options? See our detailed Thorne vs BulkSupplements comparison breaking down the $126/year difference.

🇩🇪 #8: Myprotein Creatine (Best Value + German Purity)

Certification: Informed Choice + Creapure®

Price: ~$0.25/serving (varies by region)

Purity: 99.99% (Creapure® guaranteed)

Why it's the value+purity sweet spot:

The catch: Ships from UK (longer delivery to US). Customer service can be hit-or-miss. But if you want Creapure purity without paying $0.50+/serving, this is it.

💡 Pro tip: Wait for a 40% off sale (happens monthly). At that price, you're getting German premium purity for less than generic brands.

Buy Myprotein Creapure Creatine →

⚠️ What About Transparent Labs Creatine HMB?

Certification: Informed Choice (NOT NSF)

Price: $49.99 for 30 servings = $1.67/serving

Why we don't recommend it:

Bottom line: You're paying $1.54 extra per serving for marketing. If you want premium, buy Thorne ($0.48) with NSF certification. If you want value, buy BulkSupplements ($0.13). Skip Transparent Labs.

Part 4: How to Read a Certificate of Analysis (COA)

A Certificate of Analysis (COA) is proof that a batch of creatine was actually tested for purity and contaminants. Any reputable brand should provide COAs upon request or publish them on their website.

Here's how to read one so you know what to look for:

📄 Example COA: BulkSupplements Creatine Monohydrate

Below is an actual Certificate of Analysis from BulkSupplements. We'll walk through each section and what it means.

BulkSupplements Creatine Certificate of Analysis showing purity testing results

Understanding Each Section of a COA

📊 Section 1: Product Identification

What to look for:

Why it matters: The lot number lets you trace problems back to a specific production batch. If contamination is found, the manufacturer can recall that specific lot.

🔬 Section 2: Assay (Purity Testing)

What to look for:

✅ Good result example:
Creatine: 99.99%
Creatinine: <50 ppm
DCD: Not Detected
DHT: Not Detected

❌ Bad result example:
Creatine: 96.5%
Creatinine: 450 ppm
DCD: 85 ppm
DHT: 35 ppm

⚗️ Section 3: Heavy Metals Panel

What to look for:

Why heavy metals appear: Unlike protein powder (where heavy metals come from contaminated ingredients), creatine heavy metals come from low-quality raw materials or manufacturing equipment.

Reality check: High-quality creatine from reputable manufacturers consistently shows heavy metals below detection limits. If you see measurable levels, that's a red flag.

🦠 Section 4: Microbiology Testing

What to look for:

Why it matters: Creatine is a dry powder, so microbial contamination is rare. But if manufacturing facilities have poor hygiene, bacteria and mold can contaminate the product.

Red Flags: When to Avoid a Brand

🚩 COA Red Flags (Run Away)

How to Request a COA from a Brand

If a brand doesn't publish COAs on their website, email their customer service:

Subject: COA Request for [Product Name]

Hi [Brand],

I recently purchased your [Product Name] (Lot #: [from label]).

Could you please provide the Certificate of Analysis for this batch? I'm specifically interested in:

Thank you for your transparency!

[Your Name]

What happens next:

Part 5: Price vs Value Analysis (Where to Spend Your Money)

Let's break down the real cost difference between verified-clean and generic creatine—and whether premium options are actually worth it.

The Math: Budget vs Premium Over 1 Year

Brand $/Serving Cost/Month Cost/Year Certification
BulkSupplements $0.13 $3.90 $47 NSF
NOW Sports $0.19 $5.70 $68 IC
Optimum Nutrition $0.22 $6.60 $79 IC
Myprotein Creapure $0.25 $7.50 $90 IC + CREAPURE
Jacked Factory $0.41 $12.30 $148 IC
Thorne $0.48 $14.40 $173 NSF
Legion Creatine+ $0.50 $15.00 $180 NSF
Transparent Labs HMB $1.67 $50.10 $601 IC
Generic (no cert) $0.10 $3.00 $36 NONE

*Based on 5g daily serving (standard dose), 30 days/month

Value Analysis: What You're Actually Paying For

💰 The $11/Year Question

BulkSupplements (NSF) vs Generic (no cert): $47 vs $36/year = $11 difference

What that $11 buys you:

Bottom line: $11/year is the cost of TWO Starbucks lattes. For daily supplementation, verified safety is worth it.

⚠️ The $126/Year Question

Thorne (NSF) vs BulkSupplements (NSF): $173 vs $47/year = $126 difference

What that $126 buys you:

Bottom line: Both have NSF certification (same testing standard). You're paying $126/year extra for brand prestige. Worth it if you're a pro athlete or money is no object. Not worth it for most people.

🚫 The $554/Year Mistake

Transparent Labs HMB vs BulkSupplements: $601 vs $47/year = $554 wasted

What you're NOT getting for that $554:

Bottom line: This is terrible value. You're paying for Instagram ads, not quality. Skip it.

The Sweet Spot Recommendations

💵 Best Budget Option

BulkSupplements Creatine Monohydrate

Buy Now →

💎 Best Premium Option

Thorne Creatine

Buy Now →

🇩🇪 Best German Purity + Value

Myprotein Creatine (with Creapure)

Buy Now →

👥 Best Popular Brand

Optimum Nutrition Micronized Creatine

Buy Now →

Part 6: Buying Guide by Use Case (Find Your Perfect Match)

Not everyone needs the same creatine. Here's what to buy based on your specific situation:

🏆 For Competitive Athletes (NCAA, Olympic, Professional)

What you need: NSF Certified for Sport (non-negotiable for drug testing compliance)

Recommended brands:

  1. Thorne Creatine - Most trusted by professional teams
  2. Momentous Creatine - Used by UFC, NBA players
  3. Klean Athlete Creatine - Designed specifically for athletes
  4. BulkSupplements - Budget NSF option

Why NSF matters for you: NSF tests for 270+ banned substances. Using non-NSF creatine risks disqualification if contaminated with prohibited compounds.

💰 For Budget-Conscious Lifters

What you need: Third-party testing at the lowest price

Recommended brands:

  1. BulkSupplements Creatine - $0.13/serving, NSF Certified (BEST VALUE)
  2. NOW Sports Creatine - $0.19/serving, Informed Choice
  3. Optimum Nutrition - $0.22/serving, Informed Choice, widely available

Pro tip: BulkSupplements is NSF certified at generic pricing. This is the no-brainer pick for 90% of people.

🇩🇪 For Maximum Purity Seekers

What you need: Creapure® + third-party certification

Recommended brands with BOTH Creapure + Certification:

  1. Momentous Creatine - NSF + Creapure
  2. Bare Performance Nutrition - NSF + Creapure
  3. Myprotein Creatine - Informed Choice + Creapure (best value)
  4. Dymatize Creatine (Europe) - Informed Choice + Creapure

Why Creapure? German-manufactured with patented purification. DHT and DCD consistently non-detected. Worth the premium if you have GI sensitivity or want absolute peace of mind.

🌱 For Vegans & Plant-Based Athletes

Good news: Creatine monohydrate is synthetically produced—it's vegan by default!

Recommended vegan-certified options:

  1. Vega Sport Creatine Monohydrate - Informed Choice + Vegan certified
  2. Sunwarrior Active Creatine - Informed Choice + Vegan
  3. BulkSupplements Creatine - NSF Certified, no animal products

Note: All creatine monohydrate is vegan (it's a synthetic compound). "Vegan certified" branding just confirms no animal-derived ingredients in manufacturing. BulkSupplements is vegan-friendly and cheaper.

👴 For Older Adults (50+)

What you need: High purity (sensitive to contaminants) + cognitive benefits research

Recommended brands:

  1. Thorne Creatine - Medical-grade quality, doctor-recommended
  2. BulkSupplements - NSF certified, no fillers
  3. NOW Sports - Trusted brand, Informed Choice

Why creatine for 50+: Research shows creatine helps maintain muscle mass during aging, supports bone health, and may benefit cognitive function. Start with 3-5g daily.

💪 For Bodybuilders & Serious Lifters

What you need: Pure creatine monohydrate (no fancy blends), verified quality

Recommended brands:

  1. BulkSupplements - NSF certified, unflavored, 100% pure
  2. Optimum Nutrition - Informed Choice, micronized (mixes better)
  3. Jacked Factory - Informed Choice, bodybuilding-focused brand

Skip the "creatine blends": Creatine HCL, buffered creatine, creatine ethyl ester—all marketing. Creatine monohydrate has 30+ years of research. Stick with what works.

Ready to make your purchase? Here are the most common questions we get about clean creatine...

Part 7: Frequently Asked Questions (Everything Else You Need to Know)

❓ Is Creapure always better than regular creatine monohydrate?

Short answer: Creapure is more consistently pure, but NSF certification matters more.

Long answer: Creapure® is a premium ingredient manufactured in Germany with patented purification that consistently achieves 99.99% purity and non-detected DHT/DCD. However, a brand using generic creatine with NSF Certified for Sport testing (like BulkSupplements) is equally safe because every batch is independently tested.

The hierarchy:

  1. Best: Creapure + NSF/Informed Choice (Momentous, Bare Performance Nutrition)
  2. Second best: NSF/Informed Choice without Creapure (BulkSupplements, Thorne)
  3. Third best: Creapure alone without certification (less ideal—no batch testing)
  4. Avoid: Generic with no testing

Bottom line: Creapure is excellent, but independent batch testing (NSF/Informed Choice) is more important than ingredient sourcing.


❓ Do I need NSF Certified if I'm not a competitive athlete?

Technically no, but here's why you should consider it anyway:

NSF tests for banned substances (athletes need this) + contaminants (everyone needs this). Even if you're not worried about failing a drug test, NSF certification ensures:

The cost difference: NSF certified (BulkSupplements) is $0.13/serving. Generic uncertified is ~$0.10/serving. That's $11/year for complete peace of mind. Worth it.


❓ How often should brands test their creatine?

Best practice: Every production batch.

Here's what different certifications require:

Red flag: Brands that publish one COA from 2+ years ago. Manufacturing changes, suppliers change, contamination can happen. Current batch testing is essential.


❓ Is micronized creatine better than regular?

Micronized = better mixability, same effectiveness.

What "micronized" means: The creatine particles are ground into finer powder (200 mesh vs 80 mesh). This makes it:

Bottom line: If you have GI issues with regular creatine, try micronized. Otherwise, regular creatine monohydrate works just as well and costs less.


❓ What about creatine HCL, buffered creatine, or other forms?

Marketing gimmicks. Stick with creatine monohydrate.

Here's the reality:

Don't fall for it: These alternative forms cost 2-3x more and have zero proven benefits over monohydrate. Save your money.


❓ Should I do a "loading phase" with creatine?

Optional. Loading speeds up saturation but isn't necessary.

Two approaches:

Loading protocol (faster results):

Standard protocol (no loading):

Our recommendation: Skip loading. Take 5g daily from the start. You'll saturate your muscles in 3-4 weeks and avoid potential GI distress from mega-dosing.


❓ Do I need to cycle creatine (take breaks)?

No. Creatine is safe for continuous daily use.

The myth: "You need to cycle off creatine to let your body's natural production recover."

The science: Your body produces ~1-2g of creatine daily. Supplementation doesn't shut down natural production. Studies show continuous creatine use for up to 5 years with no adverse effects.

Bottom line: Take creatine daily, indefinitely. When you stop supplementing, your creatine stores return to baseline over 4-6 weeks. No harm done.


❓ Can creatine damage my kidneys?

No. This myth needs to die.

Where the myth came from: Creatine increases creatinine levels (the waste product). Doctors use creatinine to measure kidney function. Higher creatinine can look like kidney problems on a blood test—but it's just from creatine supplementation, not kidney damage.

What the research actually shows:

Important exception: If you have pre-existing kidney disease, talk to your doctor before supplementing. For healthy kidneys, creatine is completely safe.


❓ Does creatine cause hair loss or baldness?

Extremely unlikely. Based on ONE flawed study from 2009.

The "evidence": One study showed creatine increased DHT (the hormone, not the contaminant) in rugby players. DHT is linked to male pattern baldness. People freaked out.

The problems with that study:

Bottom line: If you're genetically predisposed to male pattern baldness, you'll go bald regardless. Creatine doesn't accelerate it based on current evidence.


❓ When should I take creatine—before or after workout?

Doesn't matter. Timing is irrelevant for creatine.

How creatine works: It saturates your muscle creatine stores over weeks. Once saturated, timing of daily dose doesn't matter—your muscles are already "full."

Options that all work equally well:

Pro tip: Take it with a meal or protein shake (carbs/protein may slightly improve absorption). But the most important thing is consistency—same time daily helps you remember.


❓ Can I mix creatine with protein powder?

Yes. Perfect combination actually.

Benefits of mixing:

How to do it:

  1. Add 1 scoop protein powder to shaker bottle
  2. Add 5g (1 teaspoon) creatine
  3. Add 8-12oz water or milk
  4. Shake vigorously for 20-30 seconds

Reminder: Make sure your protein powder is also verified-safe! See our complete protein powder safety database for tested options.


❓ What if I miss a day of creatine? Do I need to reload?

No. Missing a day (or even a week) doesn't require reloading.

How muscle creatine stores work:

Bottom line: Just resume your normal 5g daily dose. Your stores will top back off within a few days. No loading phase needed.

Conclusion: Your Clean Creatine Action Plan

You now know more about creatine purity than 99% of people buying supplements. Here's your simple action plan to get started safely:

✅ Your 3-Step Action Plan

Step 1: Choose Your Creatine (Based on Your Situation)

If you're a competitive athlete:

Thorne Creatine (NSF Certified, $0.48/serving)

If you want best value + verified safety:

BulkSupplements Creatine (NSF Certified, $0.13/serving) ← RECOMMENDED FOR 90% OF PEOPLE

If you want German purity + great value:

Myprotein Creatine (with Creapure) (Informed Choice + Creapure, $0.25/serving)

If you want a trusted mainstream brand:

Optimum Nutrition Micronized Creatine (Informed Choice, $0.22/serving)

Step 2: Start Supplementing (Simple Protocol)

Step 3: Track Your Results

🛡️ Remember: Safety First

Three non-negotiable rules for clean creatine:

  1. Always buy third-party tested: NSF Certified for Sport or Informed Choice minimum
  2. Request COAs: If a brand won't provide current Certificates of Analysis, walk away
  3. Avoid generic untested creatine: The $10-15/year savings isn't worth potential DCD, DHT, or heavy metal exposure

Creatine monohydrate is the most researched supplement in sports nutrition—30+ years of studies prove it's safe and effective. But only if it's manufactured and tested properly. Don't gamble with your health for a few dollars saved.


Sources:

Last Updated: January 6, 2026

Affiliate Disclosure: This article contains affiliate links to Amazon and brand websites. When you purchase through our links, we may earn a small commission at no extra cost to you. We only recommend products with verified third-party testing (NSF Certified for Sport or Informed Choice) to ensure safety. Learn more.