costco kirkland signature
The takeaway
Mixed bag. Caffeine is still thin on studies, so the grade stays cautious.
Based on the ingredients we could read from this scan. A full label may include more — like added sugars, colorings or other ingredients — than we captured here.
Weighed against 3 published studies · led by Caffeine
Why this grade
- −Caffeine lacks sufficient research
Active ingredients
tap a row for the researchOther ingredients
tap a row for detailsFillers, binders, coatings and other inactive ingredients on the label.
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This grade is built from the label data we could match for this product, so parts of it — like the full nutrition panel — may not appear here yet. A grade is only as sharp as the label we can actually read, and it gets better every time someone shares a clear photo of the real product. Rescan the ingredients and nutrition facts and we'll sharpen it.
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Product Scan grades ingredients, nutrition and processing level. It is not medical advice; talk to your doctor before changing supplements. Grades update as new data becomes available. How we grade →