Fats may be coming back in 2015, but refined sugar is definitely on its way out, and plenty of replacements are vying to take its place. Whether you want to lose a few pounds or to make sure that you’re making the healthiest food choices, check out the best diet trends 2015.

From brand new diet books that are already making an impact to rediscovering classics like cauliflower and bone broth, here are the major dieting trends that are going big this year.

The Girlfriend Diet

From the editors of Good Housekeeping magazine, “The Girlfriend Diet: Lose Together to Keep It Off Forever!” is the dieting book that focuses on group efforts in order to achieve results. 

With a four-week meal plan that’s inspired by the Mediterranean diet, the book promises to deliver a healthy and sustainable lifestyle, while the social and shared experience makes it easier to stay focused on weight loss goals.

Bone Broth

A growing favorite for dieters who love eating Paleo, bone broth is shaping up to be one of the best diet trends 2015. Boiling animals bones for up to two days break them down and releases plenty of important nutrients, that can help improve your overall health, while also getting rid of extra weight by improving digestion.

Mono Meal Diet

The Mono Meal Diet

Based on the concept that eating a single food per meal helps you get all the nutrients from it, mono meal dieting puts emphasis on meals that consist of a single type of fruit or vegetable. The growing trend is a hit on Instagram and but applying it to every meal might not be the healthiest approach.

The 3-1-2-1 Diet

Intermittent dieting isn’t a new concept, but “The 3-1-2-1 Diet: Eat and Cheat Your Way to Weight Loss - up to 10 Pounds in 21 Days” book has a new approach to it that could turn out to be one of the best diet trends 2015. Written by Dolvett Quince, a trainer on NBC’s “The Biggest Loser”, the 21 day diet alternates cheat days between 3 and 2 consecutive days of “clean eating”, making the weight loss process easier to follow.

The Low-FODMAP Diet

A type of carbs that pull water into the intestinal tract and can contribute to irritable bowel syndrome, fermentable oligo-di-monosaccharides and polyols or FODMAPs, that can be found in wheat, dairy and certain legumes. For a more complex approach or keeping your gut healthy, look for “The Gut Balance Revolution: Boost Your Metabolism, Restore Your Inner Ecology, and Lose the Weight for Good!” in June.

See also: Worst Comfort Foods to Avoid

Fatty Diets

After the Bulletproof Coffee craze, more and more dietitians are starting to recognize the benefits of fats for a healthy body, even saturated fats. If you love dairy and meat, then one of the best diet trends 2015 for you is the ketogenic diet, a high fat, low carb eating plan that’s being embraced by more and more dieters.

Activated Charcoal Detoxing

Juice cleanses seem to be on their way out, but there’s a great new way to detox coming in 2015. Activated or liquefied charcoal certainly looks gross, but it’s proven its worth when it comes to flushing poisons out of the body. The scientific evidence when it comes to charcoal water’s potential to detox isn’t foolproof, but the fad is headed for the mainstream.

Matcha Green Tea Diet

Matcha Green Tea

A powdered version of green tea, matcha can boost your metabolism better than the regular version of the beverage. As a coffee replacement, it’s one of the best diet trends 2015, and by avoiding the steeping, you’re getting more of the antioxidant and catechin benefits of green tea.

Low GI Sugars

Artificial sweeteners are considered FODMAPs, and excessive consumption of refined sugar will definitely keep you from losing weight. That’s where low GI sugars come in as one of the best diet trends 2015. Extracted from maple, coconut or palm, they won’t give you the same cravings you get after a sugar crash.

Cauliflower

Rich in vitamin C, beta-carotene, along with plenty of other antioxidants and phytonutrients, cauliflower is definitely on the rise when it somes to healthy eating. With 0 fat and plenty of fiber, this vegetable is one its way to becoming a diet staple in 2015.