Benefits
Chronic fatigue reduction
A 6-week RCT in adults with unexplained chronic fatigue showed Robuvit® 300 mg/day produced significant improvements in energy levels, reduced fatigue scores, improved sleep quality, and better daytime functioning vs. placebo. These improvements are attributed to mitochondrial biogenesis enhancement and antioxidant protection of mitochondria from oxidative fatigue.
Athletic endurance and performance
Robuvit® supplementation (300 mg/day for 4 weeks) significantly improved performance in long-distance triathletes and runners, reducing post-race fatigue, improving recovery, and increasing time-to-exhaustion in subsequent testing. The urolithin-mediated mitophagy and mitochondrial biogenesis mechanisms explain sustained performance improvements.
Liver health and hepatoprotection
Robuvit® has demonstrated hepatoprotective effects in clinical studies, reducing liver enzyme elevations (ALT, AST), improving liver function markers, and reducing oxidative stress in hepatic tissue. These liver-protective effects reflect the antioxidant and anti-inflammatory activity of oak ellagitannins in liver cells.
Antioxidant and mitophagy activation
Like pomegranate-derived urolithins, oak-derived urolithins activate mitophagy — the selective autophagy of damaged mitochondria that maintains mitochondrial quality. This cellular housekeeping mechanism improves the overall health of the mitochondrial pool, enhancing energy production efficiency and reducing the accumulation of dysfunctional mitochondria associated with aging.
Mechanism of action
Urolithin production via robur ellagitannin metabolism
Gut bacteria convert robur ellagitannins (roburins, vescalagine) to urolithins through sequential demethylation and lactonization reactions. Urolithin A — the primary bioactive metabolite — activates mitophagy via PINK1/Parkin pathway and induces mitochondrial biogenesis via PGC-1α, improving mitochondrial quality and energy production capacity.
Mitochondrial biogenesis via PGC-1α
Robuvit® and its urolithin metabolites activate PGC-1α — the master regulator of mitochondrial biogenesis — increasing mitochondrial density in muscle, liver, and brain tissue. More mitochondria per cell means greater ATP production capacity, improved fat oxidation, and enhanced aerobic energy metabolism.
NF-κB and oxidative stress reduction in liver and muscle
Oak ellagitannins and their metabolites inhibit NF-κB activation in liver and muscle tissue, reducing inflammatory cytokine production and protecting cells from exercise-induced and toxic oxidative damage. This anti-inflammatory activity underlies both the liver-protective and exercise-recovery benefits of Robuvit®.
Clinical trials
Randomized, double-blind, placebo-controlled trial of Robuvit® (300 mg/day French oak wood extract) vs placebo in 70 adults with unexplained chronic fatigue for 8 weeks. (Belcaro et al. 2014)
70 adults with chronic fatigue.
Robuvit® reduced fatigue scores (Multidimensional Fatigue Inventory), improved energy levels, enhanced sleep quality vs placebo. Industry-funded (Horphag Research, makers of Pycnogenol®). Effect sizes modest.
Randomized study of Robuvit® (300 mg/day) vs placebo in long-distance triathlon competitors for 4 weeks before and during competition. (Vinciguerra et al. 2014)
Long-distance triathletes.
Robuvit® reduced post-race fatigue scores, improved recovery metrics, enhanced time-to-exhaustion. Industry-funded.