Sources, characterization approaches, artificial synthesis, and biological significance of 4,4‐dimethylsterols: a review

4,4-Dimethylsterols constitute a unique class of phytosterols - naturally occurring compounds that have gained significant attention due to their potential health benefits and wide-ranging biological activities. This review explores the diverse sources, chemical structure, synthetic approaches, and identification methods, focusing on the unique properties of 4,4-dimethylsterols that distinguish them within the sterol family. Comparative evaluation of analytical techniques such as solid-phase extraction, thin-layer chromatography, and gas chromatography-mass spectrometry are evaluated for their effectiveness in identifying and quantifying these compounds, which play a crucial role in verifying oil authenticity. Synthetic approaches, such as chemical synthesis and enzymatic transformation are also discussed in the context of 4,4-dimethylsterol production. Beyond methodology, the review examines the emerging trends linking 4,4-dimethylsterols to anti-inflammatory, anti-Alzheimer's, and anti-Parkinsonian properties. Finally, this review addresses prevailing challenges surrounding 4,4-dimethylsterols, including bioavailability, stability, and safety profiles, while offering a glimpse into the future of 4,4-dimethylsterol research. This review produces current knowledge and spotlights overlooked functional attributes, positioning 4,4-dimethylsterols as promising candidates for nutraceutical and therapeutic applications. © 2026 Society of Chemical Industry.