The Cocrystal of Ubiquinol: Improved Stability and Bioavailability

Area of Science:

• Nutritional Biochemistry
• Pharmaceutical Sciences
• Materials Science

Background:

• Coenzyme Q10 (CoQ10) exists as ubiquinol (reduced) and ubiquinone (oxidized) forms.
• Ubiquinol offers superior absorption and therapeutic benefits over ubiquinone.
• Ubiquinol's inherent instability poses challenges for storage and formulation.

Purpose of the Study:

• To design and synthesize a novel, stable cocrystal of ubiquinol.
• To enhance the stability, dissolution, and bioavailability of ubiquinol.
• To overcome the formulation and storage limitations of ubiquinol.

Main Methods:

• Cocrystal formation between ubiquinol and vitamin B3 nicotinamide (UQ-NC).
• Stability testing under stressed conditions.
• In vitro dissolution studies in simulated intestinal fluid (SIF) and simulated gastric fluid (SGF).
• In vivo pharmacokinetic (PK) studies.

Main Results:

• The UQ-NC cocrystal demonstrated excellent stability, outperforming the marketed ubiquinol form.
• Dissolution experiments showed significantly higher maximum ubiquinol concentrations for the cocrystal (12.6x in SIF, 38.3x in SGF).
• PK studies revealed a 2.2x greater maximum CoQ10 concentration and a 4.5x greater AUC for the UQ-NC cocrystal compared to the marketed form.

Conclusions:

• The novel ubiquinol-nicotinamide cocrystal (UQ-NC) effectively addresses ubiquinol's stability issues.
• UQ-NC exhibits significantly improved dissolution and bioavailability.
• This cocrystal represents a promising advancement for ubiquinol-based therapies and supplements.