Plus, it's not like I couldn't feed my body anything until noon. Low-carb keto drinks such as tea, water, and coffee were all options, and Dr. Axe suggested adding protein (such as his bone broth or collagen protein powders) to my liquids to help fend off hunger. So, throughout my two weeks, I experimented with Dr. Axe's bone broth protein and collagen protein, as well as unsweetened nondairy milks such as almond and oat milk. I'll cut to the chase on this one: While expert opinion is mixed on the bioavailability of collagen powder and its potential health benefits, through trial and error, I landed on coffee with oat milk and collagen peptides as my go-to morning brew. I also took some of Dr. Axe's Keto Fire supplements in the morning. They contain exogenous ketones, which is a fancy way of saying bonus ketones my body doesn't produce on its own.

And monounsaturated fat isn't the only thing olive oil has going for it nutritionally. Some olive oils come with phytonutrients that may offer their own disease protection benefits (still, it's not clear whether most of us can take in enough of these phytonutrients without going overboard on olive oil, says Joyce Nettleton, DSc, RD, researcher and editor of the PUFA Newsletter).

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