Creatine is the organic compound gym shoppers buy as monohydrate powder, and Google Shopping interest for that keyword printed 34 the week of September 12 2026. That is down 5.56% from 36 on September 5 and up 36.0% from 25 on August 15, per Trends MCP get_growth on google shopping pulled September 14 2026. The 261-week get_time_series on the same source runs from September 18 2021 (first print 4) through September 12 2026 and peaked at 100 on April 18 2026. Same-week 2025 printed 12. Google Search for creatine is 57 on September 12, down 8.06% from 62 over 7 days and down 20.83% from 72 over 30 days, a search story that fails both mover bars. Shopping is the source that clears the 30-day bar and still has a readable cart climb off July.
About creatine
Creatine is an organic compound that vertebrates use to recycle ATP, mainly in skeletal muscle as phosphocreatine, which is why September shopping maps to generic tubs of creatine monohydrate powder on grocery shelves rather than to a single brand SKU.
Wikipedia dates the isolation to 1832, when Michel Eugene Chevreul pulled a precipitate from skeletal muscle and named the crystals from the Greek word for meat. About 95% of the body's creatine sits in skeletal muscle. Harris, Soderlund, and Hultman, in the September 1992 Clinical Science paper, showed that oral creatine raises muscle creatine in resting and exercised subjects. Cooper and colleagues, in a July 2012 Journal of the International Society of Sports Nutrition update, put endogenous synthesis near 1 gram per day and dietary intake near 1 gram per day on an omnivorous diet. A Front Nutr paper dated April 4 2025 states that high-quality creatine monohydrate is Generally Recognized as Safe by the Food and Drug Administration. Vital Proteins tracks the other late-summer supplement climb on this site.
What the time series shows
Google Shopping interest for creatine printed 34 the week of September 12 2026, down from 36 on September 5 and up 36 percent from 25 on August 15, a five-week cart rebuild that still sits 66 percent under the April 18 2026 peak of 100.
The 261-week series opened at 4 on September 18 2021. Last eight weekly prints are 14, 15, 21, 25, 35, 35, 36, and 34. Closest 30-day point is 25 on August 15 (+36.0%). Closest 90-day point is 68 on June 13 (-50.0%), because June still held leftover spring demand after 100 on April 18. Same-week 2025 printed 12, 2024 printed 12, and 2023 printed 8. Last August spiked to 61 on August 9 2025 and 62 on August 16, then snapped to 14; 2026 climbs from 14 on July 25. Week-over-week percent-change sample standard deviation on the last 52 weeks is 32.41%. The chart window starts September 14 2024.
Why the page charts Google Shopping
A powder people buy should be tracked on a shopping source first, and Google Shopping for creatine clears the 30-day +25% bar while Google Search for the same keyword fails both the 7-day and 30-day windows from a 57 print. Google Search for creatine is 57 on September 12, down 8.06% from 62 on September 5 and down 20.83% from 72 on August 15. The 7-day print fails +20%. The 30-day print fails +25%. The 1-year print is 57 from 60, down 5.0%. Search is a high, stuck query after the April peak. Shopping is the cart. Amazon for creatine is stale at August 31, 94.3, down 2.18% from 96.4 on July 31 and up 10.94% from 85.0 a year earlier, so it fails both the 30-day and 1-year bars.
Google Shopping is the story source: 36 to 34 in the frozen weekly series over 7 days, 25 to 34 in 30 days, 12 to 34 in 1 year (+183.33%), 261 weekly points, week-to-week sample standard deviation 32.41% on the last 52 changes. Same-day get_growth on google shopping, 30-day window, puts collagen peptides at 23 (+64.29% from 14), vital proteins at 29 (+61.11% from 18), pre workout at 23 (+43.75% from 16), protein powder at 4 (+33.33% from 3), and whey protein at 43 (+19.44% from 36). Fitness context: Strava. Product context: Garmin Fenix. Source context: Google Shopping trends.
get_time_series with source google shopping and keyword creatine is the call behind the chart. get_growth on the same pair, windows 7D and 30D, is the headline math: 36 to 34 (-5.56%) and 25 to 34 (+36.0%). Mixing the Google Search 57 with the Shopping 34 would invent a story the APIs do not tell.
A copy-paste pair for Claude or Cursor:
get_time_series source="google shopping" keyword="creatine"
get_growth source="google shopping" keyword="creatine" percent_growth=["7D","30D","1Y"]
REST is the same body at https://api.trendsmcp.ai/api with Authorization: Bearer and mode set to get_time_series or get_growth.