Label read Oct 30, 2026. Where the data comes from
Which L-glutamine brands are third-party tested?
Change the quantity to see the actual container subtotal and whether it reaches the recorded free-delivery threshold.
60 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.
Delivery is extra; the retailer has not published a rate we can apply.
Set the quantity at the retailer; this calculator does not add items to a cart. Uses the recorded unit price with no coupon or quantity discount. Tax is extra. Delivery terms apply to the contiguous US unless the policy says otherwise.
Free shipping on orders over $30, from the shipping policy page, first read September 1, 2026: "We currently offer the following shipping methods: Free Shipping for orders over $30, Standard Shipping for orders under $30". The page read "Free Shipping for orders over $30" again on September 26, 2026. The standard rate itself is not published, so delivered cost below $30 is Unknown. Read again on October 30, 2026 with the same terms.
Ordered by price, lowest first, and labeled so you can see what each link earns us. Commission is never an input to that ordering. If the cheapest retailer pays us nothing, that is still the one we send you to. No link on this page earns us anything; every Buy button is a plain retailer link.
Latest recorded price: $14.95 at Double Wood Supplements (direct), checked . First checked on Oct 30.
We check each price about once a day, so this is the range we recorded, not necessarily every price there has been. It says what changed, not why, and nothing about where the price goes next.
We could not locate independent testing or certification for this product. That is a statement about our search, not about the product. These programs certify what a company submits to them, so a product can be absent simply because it was never entered, which is not a finding against it. Which certifier databases we searched, and when, is listed below. Where a program is not listed there, we have not checked it and do not imply anything either way.
No laboratory report with figures is recorded here for this product.
Same category and format and, where a category is compared by strength, the same labeled strength. Different recorded ingredient-form lists are kept separate. Ordered by container price before delivery; only fresh recorded prices are shown. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.