The MGM Grand wants to make sure guests feel great while staying at its Las Vegas hotel, and have plenty of energy to spend hours in the casino. Not only did it complete a “Grand Renovation” of the facility, but 42 guest rooms are now considered “Stay Well” rooms, equipped with plenty of features to help jet-lagged guests improve sleep and wellness during their visits.

The Stay Well Rooms include advanced room lighting that improve guests’ internal clocks by helping regulate melatonin production during sleep/wake cycles, as well as wake-up light therapy which exposes guests to short periods of blue-shaded lighting to increase energy and reverse the effects of jetlag.

The vitamin C-infused showers neutralize chlorine to promote healthy hair and skin, and the “Stay Well” air purification system offers an advanced HEPA-standard air purification system to reduce allergens, toxins and pathogens in the room.

“Stay Well” guests have the option of aromatherapy in their rooms and water goes through a special filtration system to disinfect byproducts, chlorine, pesticides and even some pharmaceutical and personal care products.

LasVegasAdvisor.com president Anthony Curtis told NBC News the rooms are perfect for those Las Vegas visitors who are seeking a less toxic experience while in Sin City.

“You see lots of people playing slots with their shirts pulled over their mouths or wearing surgical masks,” he told NBC News. “There’s been a real big push lately — non-smoking sections, green initiatives — to accommodate (health-conscious travelers).”

Still other health experts say there’s not yet any scientific proof the rooms offer any health benefits.

“It could help but there’s also the placebo effect,” Stuart Rose, founder and medical director at the Travel Medicine Center of Western Massachusetts, told NBC. “When you tell people a treatment will make them feel better, they’ll usually feel better.”

The MGM Grand’s Stay Well Rooms are available for as little as $20 to $30 more than the hotel’s standard room rates—about $114 per night.