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Bodybuilding.com's macro calculator starts with the Mifflin St. Jeor equation, which is considered by our nutritionists and dieticians to be the "gold standard" of calorie calculators.

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How Did We Calculate Your Calories? Bodybuilding.com's calculator uses the Mifflin St. Jeor calculation, which is considered by our nutritionists and dieticians to be the "gold standard" of calorie calculators. …

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The gut, or gastrointestinal (GI) tract is one of the largest systems responsible for keeping our body in working order. Food and a wide variety of nutrients pass through the separate parts, being broken …

Bodybuilding.com is your resource for training methods, plans, and workout guidance. You can browse our articles on a variety of topics including nutrition, health & wellness, and inspirational stories from …