pTeroPure (Pterostilbene).

Pterostilbene is the dimethylated form of resveratrol, so the two act on the same sirtuin and Nrf2 targets while the methoxy groups make pterostilbene resist glucuronidation and stay in circulation far longer. Combining them stacks one mechanism at two exposure profiles.

Sirtuins consume NAD+ each time they deacetylate a target, so a stilbene that raises sirtuin activity depends on the NAD+ pool that nicotinamide riboside refills. This substrate-plus-activator logic is why the two are routinely formulated together.

NMN sits one step from NAD+ and refills the cofactor that sirtuin activity spends. The pairing rests on the same substrate-and-activator relationship as nicotinamide riboside.

Quercetin occupies the sulfotransferase and UDP-glucuronosyltransferase isoforms that also conjugate stilbenes, so co-dosing leaves more unconjugated pterostilbene in circulation. The same interaction is well described for resveratrol.

Piperine slows intestinal glucuronidation, the main clearance route for stilbenes and other polyphenols, raising how much intact compound reaches the bloodstream. It is standard practice in stilbene and curcuminoid formulas.

Fisetin and pterostilbene are both polyphenols cleared by sulfation and glucuronidation, so they compete for the same conjugating capacity and each raises the other's exposure. They are also commonly formulated together on the senescent-cell axis.

Curcumin is one of the most heavily glucuronidated dietary polyphenols and competes with stilbenes for the same UGT isoforms. Both also converge on Nrf2-driven antioxidant gene expression.

Stilbenes damp platelet aggregation through COX and thromboxane signalling, and EPA-rich oils shift eicosanoid balance in the same direction. Stacking them adds two mild influences on normal clotting rather than one.

Ascorbate works in the water phase and regenerates phenoxyl radicals formed when lipid-phase antioxidants quench a radical. A trans-pterostilbene isolate sits in the lipid phase, so the two occupy complementary compartments. This is textbook redox chemistry rather than a result measured for this branded material.

Tocopherol terminates lipid peroxidation chains inside membranes, and stilbene phenols can hand an electron back to the tocopheroxyl radical. Both partition into the same fat phase of a softgel or a meal. The pairing is conventional in antioxidant formulation.

A high-assay trans-pterostilbene powder is close to insoluble in water. Dispersing it in medium-chain triglycerides keeps it in solution and routes it through the same micellar uptake that dietary fat uses. This is a delivery decision at the formulation stage.

Phospholipids emulsify poorly soluble phenolics and hold them dispersed through gastric transit. Lecithin is the usual choice where a non-soy emulsifier is wanted. The step affects presentation to the gut wall, nothing downstream of that.

Lipoic acid and dihydrolipoic acid move between water and lipid phases and can regenerate both ascorbate and tocopherol. That places them upstream of the same radical-handling network a stilbene feeds into. Mechanistic reasoning, not a combination study.

N-acetylcysteine supplies cysteine, which is rate-limiting for glutathione synthesis. Stilbenes are described as raising transcription of the enzymes that use that cysteine. Substrate and enzyme expression are separate steps and neither substitutes for the other.

Ubiquinol is the membrane antioxidant that protects mitochondrial lipids directly, while a stilbene acts mostly by shifting the expression of antioxidant enzymes. The two therefore act on different timescales, one chemical and immediate, one transcriptional. Combining them is formulation logic.

Urolithin A is a gut microbial metabolite of ellagitannins described as acting on mitophagy, and stilbenes are described as acting on sirtuin and AMPK signalling that touches the same housekeeping pathways. Both are polyphenol-derived and both are usually presented as mitochondrial-quality ingredients. No trial has measured them together.

Catechins and stilbenes both signal through Nrf2 and both are conjugated by the same sulfotransferases and glucuronosyltransferases. Together the signalling is complementary and the metabolism is competitive. The competition has not been quantified for this pair.

Sulforaphane releases Nrf2 by modifying Keap1 cysteines, a different entry point into the pathway stilbenes are described as activating. Two inputs to one transcriptional programme are usually described as complementary. This is mechanism only.

Silymarin inhibits UDP-glucuronosyltransferase activity in laboratory work, and glucuronidation is the main clearance route for stilbenes. Co-ingestion could raise the unconjugated fraction. Inferred from enzyme studies, not measured for this material.

Stilbene aglycones are described as raising the expression of glutathione-handling enzymes, so the glutathione pool is downstream of the same signalling. Supplemental glutathione contributes to that pool from the other end. Measurements here are of markers, not of outcomes.