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illustration - Showing a scale from Sedentary to Moderately Active, up to Extra Active. This scale is known as the Standard Activity Factors (SAF).

What Is the Standard Activity Factor (SAF)?

Illustration - Showing a map of the united states surrounded with a measuring tape. The map is distorted to make it appear like a waistline.

We Analyzed 110,039 People Aiming to Lose Weight. Here’s What We Learned About Dieting in America.

photo - A woman holds a phone, tracking her calories in a calorie tracking app

The Exact Number of Calories You Need to Lose Weight

photo - Woman concerned about losing muscle mass points to her bicep

Is Losing Muscle on a Calorie Deficit Inevitable?

Photo - woman does exercise at the gym. To lose weight while maintaining muscle, you should engage in resistance training.

How to Lose Fat While Maintaining Muscle at the Same Time

Ultra-Processed People is a book about ultra-processed foods

I Tracked My Ultra-Processed Food Intake for 4 Weeks, While Reading Chris van Tulleken’s Book. This Is What Surprised Me.