1. Thorne
Thorne Creatine
$44 90 servings; no subscription price shown, per Thorne
NSF lists the 450 g and 900 g jars, and owners rate it 4.7 from 18,503 Amazon ratings.
Best supplements for drug-tested athletes
Buy only products listed as NSF Certified for Sport, and check your exact size and flavor in NSF's database. Thorne Creatine, Momentous Creatine, Momentous Whey Protein Isolate (Chocolate and Unflavored) and AG1 Next Gen all hold that listing, checked October 6, 2026. LMNT's drink mix is not listed.
Updated October 6, 2026.
2. Momentous
Creatine
$42.99 90 servings; $32.24 on subscription, per Momentous
NSF lists the 450 g jar, and Momentous posts certificates of analysis for 96 creatine batches.
3. Momentous
Whey Protein Isolate
$69.99 25 servings; $52.49 on Subscribe and Save, per Momentous
Chocolate and Unflavored are NSF listed at 20 g protein per scoop, with certificates posted for 152 whey batches.
4. AG1
AG1
$99 30 servings, plus $9 shipping; $79 a month or $207 every 90 days on subscription, per AG1
NSF lists AG1 Next Gen in 65 g and 390 g packs with lot numbers published; AG1 says every batch is tested for 280+ banned substances.
We may earn a commission from links on this page.
Questions
Is Ketone-IQ NSF Certified for Sport?
The caffeine-free 2 oz Ketone-IQ shot is listed as NSF Certified for Sport (checked October 6, 2026). That listing covers this version only, so check NSF's database before buying a caffeinated version or another format.
Does a brand's own testing count?
Not as a sport certification. LMNT says it tests lots for label claims, microbes and heavy metals and posts certificates for popular flavors, but it names no lab and is not listed by NSF Certified for Sport. For drug testing, rely on the certifier's own database listing.