Spas across the globe are stepping up their game. With the Global Wellness Institute predicting that the global wellness tourism industry will be worth $9 trillion by 2028 and the global spa services market valued at $99.79 billion in 2024 according to Fortune Business Insights, there’s certainly an audience to be captured. Organizations like nonprofit  Hevolution Foundation have committed to $1 billion annually to drive aging research forward. Forbes reports that longevity and anti-aging start-ups saw nearly $2 billion in venture capital funding in 2021, a two-fold increase from the previous year.A desire to not just live longer but better is the fuel to that booming market, with longevity and antisenescence therapies estimated to reach $44.2 billion by 2030. The tools for those therapies can be derived from ancient practices like Ayurveda, high-tech tools like 3D body imaging, or niche medical routes like stem cell injections. Receiving these treatments in lavish surroundings that are as pleasing to the eye as they are to the mind is showing customers that they can have the best of both worlds: a tranquil setting and top-tier scientific innovation.From the UK to Mexico, BeautyMatter rounds up the most luxurious spas offering science-backed treatments for the wellness travelers of today and tomorrow.