Reviewer: Theresa Greenwell

Theresa Greenwell is the Scientific Affairs Manager at BulletProof 360. She received her degree in Dietetics from the University of North Carolina at Greensboro and has over 16 years of experience in supplement and nutritional product formulating, regulatory affairs, scientific research, and marketing. Having grown up as an overweight child, she strives to make products that will help others reach their weight and health goals in a way that is maintainable, not just temporary.

Theresa is passionate about animal welfare, history, health and hanging out with friends and family. She enjoys archery, target shooting, singing, dancing, hiking, roller skating and amusement parks.

woman touching face and smiling

Why Your Skin Needs Collagen to Stay Young

If you follow the Bulletproof Diet, you know that sipping bone broth and drinking collagen peptides powder can help you look and feel great. Collagen supports glowing and hydrated skin. It’s no wonder that collagen supplements have become a common addition to many wellness plans. But what does collagen do...

fresh coffee under a single serve coffee machine with a jar of coffee beans

All the Reasons to Drink Coffee Before Your Workout

Thanks to social media apps like TikTok and Instagram, we’ve seen many coffee trends come and go. They start by making a splash and then quietly disappear. But the best ones? They earn a permanent spot in your routine—just like your daily cup of coffee. Protein coffee (also called “proffee”)...

person sitting on toilet

Can’t Poop? Science Says the Squatty Potty Helps You Poop Faster and Better

Everyone poops. But the Squatty Potty promises to “give you the best poop of your life, guaranteed.” Plopping onto the scene with a successful Shark Tank debut and an unforgettable unicorn-themed commercial, this simple squat stool is breaking down taboos around our daily defecations, sparking odd dinner-time conversations, and helping...

Your Sleep Quality Declines As You Age. Here’s What to Do About it

Your Sleep Quality Declines As You Age. Here’s What to Do About it

When people feel chronically tired, they are usually under the impression that they need to go to bed earlier. It’s not always that simple, though. A great night’s sleep involves more than just your bedtime. What happens behind the scenes determines how you’ll feel in the morning. Sleep scientist Dr....

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Weight Management Supplements That Actually Work

Browse the aisles of any drugstore, and you’ll find dozens of powders and pills that promise to melt fat and take off the weight. While there’s no magic pill for weight loss, weight management supplements can make the job easier. These work by speeding up your metabolism and increasing your fat...

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Histone Acetylation: The Other Superpower of Ketosis

When I first went into nutritional ketosis by restricting carbs, I felt like a new person. Actually, I felt like garbage for a few days, then I felt like a new person. There’s a good chance you’ve heard people rave about the benefits of ketosis — increased energy, effortless fat...

Keto breakfast taco with bacon and guacamole

These 33 Easy Keto Recipes Will Make You Want to Go Low-Carb

Going low-carb doesn’t have to be hard: These easy keto recipes prove you can stick to your plan without turning your whole kitchen upside down. These easy keto recipes cut down on ingredients and prep time so you can have your meals ready in minutes. Use them for fast weekday...

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Obesogens: How Toxic Chemicals Make You Fat and What to Do About It

Have you noticed that the Bulletproof Diet doesn’t ask you to count calories? That’s because you don’t have to track your macros to lose weight. Ever. Weight loss isn’t a game of eat calories, burn calories. Your body is much more complex than that. There are slim people who can...

Cauliflower with supplements

Choline Deficiency: Everything You Need to Know About This Essential Nutrient

What is choline? Choline is crucial for your body to function because it’s involved in many different processes. It is essential to get enough for your health. Choline contributes to the formation of cell membranes. It also contributes to neurotransmitter synthesis, fat metabolism, liver function and DNA synthesis. Certain populations...

Chunks of cacao butter

How to Use Cacao Butter, the Keto-Friendly Fat Your Diet Needs

Whether or not you’ve heard of cacao butter, you’ve probably tasted it (or rubbed it on your skin). This keto-friendly butter rarely plays a starring role in recipes, but works in the background to add creamy mouthfeel, fragrance and smoothness to your favorite food and body products. But what makes...

Cranberry keto muffins

18 Sweet & Savory Keto Muffins to Start Your Day Right

These recipes for keto muffins make the ideal low-carb snack or breakfast swap. Like other recipes, they create perfectly sweet and crumbly results that satisfy your cravings — all without the added junk. Related: 16 Sweet, Crunchy, & Easy Keto Cereal Recipes With loads of sugar and high-fructose fruit, most...

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5 Food Additives That Wreck the Gut

Bulletproof principles focuses on whole foods like grass-fed meat and organic vegetables that are free of additives — but that doesn’t mean there’s a problem with packaged food. As long as it has quality ingredients, packaged food is a great way to get nutrients on the go and save some...

Illustration of probiotic microbes and gut

What are Probiotics?

The human body is estimated to contain as many bacteria as cells. Probiotics are the beneficial microorganisms found in your body and especially your gut. They help keep their potentially harmful counterparts in check. Probiotics can also positively impact digestive health, immune function and more. Probiotic supplements support gut health...

Keto Oreos stacked on top of each other

Keto Oreos

Keto Oreos recipe and content provided by Sheridan Austin These keto Oreos are a low-carb take on an iconic dessert. With the same creamy filling and chocolatey cookies you crave, this snackable treat uses all-natural ingredients and won’t blow your macros. Related: Keto Cookie Ice Cream Sandwiches Unlike the original...

Illustration of thriving gut microbiome

Gut Bacteria and Weight Management: What You Need to Know

Not losing weight? Your stubborn gut bacteria may be to blame. A growing body of research says that your gut microbiome affects your entire body, from your hormones to your metabolism. If your gut is out of whack, those stubborn bacteria can hamper your weight management efforts and keep you...

Woman holding picture of intestines

Losing Sleep Wrecks Your Gut. Here’s What You Can Do About It

If you want to live longer, feel better, and perform better, it pays to understand how sleep impacts your body. That’s why improving your sleep quality is one of the laws in my new book, “Game Changers: What Leaders & Mavericks Do to Win at Life.” Here’s another reason to...