Koh Samui has long been Thailand's go-to island for a reset, and its wellness scene now spans everything from backpacker yoga classes to multi-award-winning retreats. A recent stay across three of the island's luxury resorts shows just how different those experiences can be — and how good plant-based eating has become along the way.

First up, W Koh Samui brings the brand's playful 'Whatever/Whenever' service to the Gulf of Thailand. The Premier Ocean View Pool Villas are the draw here: ocean views from the freestanding bath, a private infinity pool on the decking, and tech to set the mood. The vegan food is surprisingly ambitious — a new Thai menu from Executive Sous Chef Bee, vegan egg benedict with almond hollandaise at breakfast, and refined Japanese at NAMU, including roasted eggplant with miso and truffle sauce. Wellness runs from daily Pilates, HIIT and yoga at FIT STUDIO to a 24-hour gym and the spa's THAIMAZCAL, a sweat lodge-style herbal steam room best paired with a signature massage.

Up in the hills, Kapuhala is the island's fully vegan hideaway — just nine Tented Villas and boutique Farmhouses set among boulders and jungle, with sweeping sea views. Its restaurant, Halapua, serves vegan Sicilian food from chef Crystal Lee: polpette made with beans and walnuts, penne al pesto, beetroot arancini and a vegan moscato to wash it down. Wellness facilities include a 25m saltwater infinity pool, wood-fired sauna, steam room and ice bath, plus sunrise yoga on your own deck or one of the retreats hosted through the year.

The third stop, Kamalaya, takes a holistic approach that has earned it awards since opening in 2005. Programmes focus on detox, fitness and yoga, or you can build your own with the resident therapists. Every stay starts with a wellness consultation and Body Bio-Impedance Analysis, and days fill up with meditation, qigong and spinal mobility classes, a herbal steam cavern built into the hillside and an icy plunge pool. The food at Soma and Amrita Café is clearly labelled, with detox menus built around vegan dishes — think mung bean kitcharee, raw tacos and a dark chocolate terrine made with Thai single-origin chocolate. Room tip: the TV-free sea view villas make switching off genuinely easy.

Who is this for? Travellers who want wellness to be the whole trip rather than a spa afternoon. W suits those who like their luxury with energy and design flair; Kapuhala is the pick for committed vegans and anyone craving seclusion; Kamalaya works best if you want structure, expert practitioners and measurable results. If plant-based dining is a priority, all three deliver — a notable shift from the days when vegan meant a sad side salad.