Part 1: Full-spectrum kratom extract, standardized for mitragynine
Kratom (Mitragyna speciosa) is a tropical tree in the coffee family native to Southeast Asia. Its leaves contain more than forty identified indole alkaloids. The most abundant, and the one most responsible for kratom’s characteristic effects, is mitragynine, which typically makes up 0.5–2% of dried leaf by weight. Alongside it are paynantheine, speciogynine, speciociliatine, corynantheidine and a long tail of minor compounds, including trace amounts of 7-hydroxymitragynine (7-OH).
Tempo uses a full-spectrum leaf extract. The leaf is extracted with food-grade solvents, concentrated, and dried into a powder that keeps the natural alkaloid profile intact rather than isolating any single compound. That extract is then standardized: each batch is assayed by HPLC for mitragynine, and the amount blended into each tablet is adjusted so every tablet contains 20 mg of mitragynine as part of its 250 mg kratom alkaloid blend. Full-spectrum gives you the entourage of the whole leaf; standardization gives you the same tablet every time.
Why a moderate dose
20 mg of mitragynine per tablet is deliberately moderate for an extract product. Higher-dose extracts push into the territory our testers describe as harsh: sharp onset, stomach discomfort, a jittery edge. A moderate dose is more comfortable on its own, and with the cross-score it yields a genuinely light 10 mg half serving for daytime use. The corydalis pairing (Part 2) is what makes the moderate dose feel complete.
Why not 7-OH
Tempo contains no added 7-hydroxymitragynine. 7-OH occurs naturally at trace levels in leaf, and as of August 5, 2026 the DEA has temporarily scheduled concentrations above 0.050% dry weight or 1.00 mg per unit. A properly made extract that is not deliberately converted or enriched sits well beneath that line, and we verify it on every lot. Our 7-OH alternatives guide covers the regulatory details.
Part 2: 13-OH Corydalis yanhusuo extract
The second active ingredient is 30 mg of a standardized Corydalis yanhusuo rhizome extract from Corydalis Labs. Corydalis is a plant in the poppy family, botanically unrelated to kratom, with its own family of isoquinoline alkaloids. The best-known is tetrahydropalmatine (THP); the one Tempo’s extract is standardized for is a distinct hydroxylated compound called 13-OH. HPLC separates the two cleanly (they elute at different retention times), so the 13-OH content can be quantified on its own.
The formulation rationale comes from Corydalis Labs’ work with the ingredient: in a blend, 13-OH allows a formula to use less mitragynine while feeling fuller, with reduced sensory harshness. Their guidance is 25–40 mg of 13-OH per serving, and Tempo lands at 30 mg per full tablet, of the 250 mg blend. Corydalis is not a scheduled substance and has been sold as a botanical ingredient in the US for decades. The corydalis deep-dive goes into the botany, the HPLC method and the sourcing.
Part 3: The tablet itself
A Tempo tablet weighs about 1000 mg. 250 mg of that is the kratom alkaloid blend (the label’s “250MG PER TABLET”, 1000 mg across a 4ct pack); the rest is a small, disclosed set of excipients: microcrystalline cellulose, natural flavors, citric acid, stevia leaf extract, magnesium stearate, silica. Each does one job. Microcrystalline cellulose is the binder that lets the tablet hold together and snap cleanly. Natural flavors and stevia handle taste. Citric acid brightens the fruit flavor and offsets bitterness. Magnesium stearate and silica keep the powder flowing evenly through the tablet press so every tablet gets the same fill weight.
Cross-scoring
The tablet is pressed with a deep cross-score on one face. That’s not decoration: the score depth is set so the tablet breaks reliably along the line by hand, producing two halves of approximately equal weight. Content uniformity testing on each lot confirms that actives are evenly distributed through the tablet, so a half really is half.
Chewable by design
Kratom extract is intensely bitter, which is why most extract products are capsules or shots. Tempo is flavored (Mixed Berry Blast, Blue Razz Slush, Strawberry Dream) and lightly sweetened so it can be chewed. Chewing also breaks the tablet up before it reaches the stomach, which testers report gives a slightly quicker and smoother onset than swallowing whole. Both work.
Part 4: What to expect and when
Typical onset is 20–40 minutes, with a peak around the one-hour mark and a gradual taper over the following few hours. Taking Tempo with a small amount of food slows onset slightly and is easier on a sensitive stomach. The serving ladder is simple: a half tablet for a lighter, daytime-leaning experience, and a full tablet when you want the complete effect. We recommend at least 6 hours between servings and no more than one full tablet per day until you know how it affects you.
Experiences vary with body weight, food, tolerance and individual chemistry, and the descriptions on this site are drawn from early tester feedback rather than clinical study. Tempo is not intended to diagnose, treat, cure or prevent any disease.
Part 5: Testing and verification
Every production lot is sampled and sent to an independent laboratory accredited to ISO/IEC 17025, the international standard for testing-lab competence. The panel covers:
| Test | Method | What it confirms |
|---|---|---|
| Mitragynine | HPLC-UV / LC-MS | 20 mg per tablet (of the 250 mg blend), within tolerance |
| 7-hydroxymitragynine | LC-MS/MS | Below 1.00 mg per unit (federal threshold) |
| 13-OH corydalis | HPLC | Corydalis extract content as labeled |
| Heavy metals | ICP-MS | Lead, arsenic, cadmium, mercury within limits |
| Microbials | Plate count / PCR | No Salmonella, E. coli; yeast and mold within limits |
| Pesticides | LC-MS/MS, GC-MS | Multi-residue screen passes |
| Residual solvents | GC headspace | Extraction solvents within USP limits |
The certificate of analysis for each lot is published at /coas, searchable by the lot number printed on the sachet or blister. Our quality and compliance page describes the cGMP manufacturing environment, raw-material identity testing and batch traceability that sit underneath the finished-product COA.
The short version
- A 250 mg kratom alkaloid blend per tablet (1000 mg per 4ct pack), Intensity 08/10.
- Full-spectrum kratom leaf extract, standardized to 20 mg mitragynine per tablet, of the 250 mg blend.
- 30 mg 13-OH Corydalis yanhusuo extract (of the blend) so the formula feels fuller at a moderate dose.
- No added 7-OH; every lot verified under the federal threshold.
- Cross-scored, chewable, 1000 mg tablet with a fully disclosed excipient list.
- Seven-panel ISO/IEC 17025 testing, published per lot.
Ready to try it? Start with the 1ct sachet ($7.99) or the 4ct blister ($24.99). More reading on kratom alkaloids, corydalis and the 7-OH transition lives on the blog.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Not for use by anyone under 21. Keep out of reach of children. Do not use if pregnant or nursing. Consult a physician before use if you have a medical condition or take medication. Do not operate a vehicle or heavy machinery after use. Kratom products may be habit-forming; use responsibly.