L-Glutamine questions
6 questions about L-glutamine, each answered from the 32 products we track, priced per 5 g where a price is on record, and from the certifier listings behind them, recomputed on every build. Where the answer is “we do not know”, it says so. Below them are 16 questions that span more than one supplement. See every L-glutamine product.
Which L-glutamine brands are third-party tested?
Every L-glutamine we price, grouped by whether a certifier names the exact package sold, lists it without confirming it, or lists nothing we found.
L-glutamine powder vs capsules: what is the difference in price?
What 5 g of L-glutamine costs as powder and as capsules, and how many capsules make 5 g, from each label. The 5 g is a yardstick, not a suggested dose.
What is the cheapest NSF certified L-glutamine?
Every L-glutamine we track whose exact package appears in NSF’s Certified for Sport database, ranked per 5 g. Each price says whether it includes delivery.
Is BulkSupplements L-glutamine NSF certified?
BulkSupplements L-glutamine bags and capsules checked against NSF Certified for Sport: which packages a listing names, what it prints, and its ID.
Is Thorne L-glutamine NSF certified?
Thorne L-glutamine powder and capsules checked against NSF Certified for Sport: which packages a listing names, with the listing IDs.
Is Sports Research L-glutamine third party tested?
Sports Research L-glutamine checked against Informed Sport and NSF Certified for Sport, and whether each listing covers the tub sizes we price.
Questions that span more than one supplement
Do third-party tested supplements cost more?
Per category, we compare the cheapest product we track with the cheapest a certifier names at the exact package: one format, and one strength where it matters.
Is BulkSupplements third party tested?
Every BulkSupplements product we track, grouped by what we found: a listing at the exact package, at another size or form, one not yet settled, or none. With listing IDs.
Is Thorne third party tested?
Every Thorne product we price, checked in NSF’s Certified for Sport database: which listing names the exact package sold, with the listing IDs.
Is Core Med Science third party tested?
Every Core Med Science product we price, checked in NSF’s Certified for Sport database: which listing names the exact package sold, and the IDs.
Is Optimum Nutrition third party tested?
Every Optimum Nutrition product we track, checked in the certifier databases: what each listing covers, package by package, with the listing IDs.
Is Momentous third party tested?
Every Momentous product we price, checked in NSF’s Certified for Sport database: where a listing names the exact package, and where it names another size.
Is BPN third party tested?
Every Bare Performance Nutrition product we price, checked in NSF’s Certified for Sport database: which package each listing names, and which it does not.
Which supplements are NSF Certified for Sport?
Every package we track that NSF names in its Certified for Sport database, by supplement and brand, with the listing IDs and what each listing actually covers.
How do you check that a supplement is NSF Certified for Sport?
Where to search, why the search results are not enough, and which line of the listing to read against the package in your hand. No prices and no store links.
How do you work out what a supplement costs per dose?
Type the price, servings and amount per serving of one package or two. It works out each one's cost per serving and per comparison dose, and which costs less.
Do supplement prices actually change?
We keep every price reading we take: daily where a store can be read automatically, less often where it is read by hand. Which prices have moved since we started, which have not, and by how much.
How many capsules is one serving?
How many pills the label calls one serving, across every capsule, tablet and softgel we have a price for, and what that does to the count on the front of the bottle.
Is MegaFood third party tested?
Every MegaFood product we price, checked in the NSF, USP and Informed databases: which listing names the exact package sold, and which we found no listing for.
Is Evogen Nutrition third party tested?
Every Evogen Nutrition product we price, checked in NSF’s Certified for Sport database and others: which listing names the exact package sold, with the listing IDs.
Is BUBS Naturals third party tested?
Every BUBS Naturals product we price, checked in NSF’s Certified for Sport database: which listing names the exact package sold, with the listing IDs.
Is Sports Research third party tested?
Every Sports Research product we track, checked in the certifier databases: which program lists each one, and which no database we searched lists.
Questions about something else: Creatine Monohydrate · Magnesium · Vitamin D3 · Omega-3 · Whey Protein · Casein Protein · Plant Protein · Collagen Peptides · Beta-Alanine · Vitamin B12 · Vitamin C · Zinc. Or every question on one page.
What this rests on: Prices are the last ones we recorded at the retailer named on each product page. Prices go stale, so each page says when it was checked. We track some products, not every one sold, and Amazon and Walmart are not among our stores. Listings and labels are read at the source, and each page links to them. Found an error? Tell us. The full method: How we compare.