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Dr. Ian Smith

Dr. Ian Smith is an American physician and author of several books, most recently "Eat Your Age."

Dr. Ian Smith is an American physician and bestselling author of "Eat Your Age," "Shred: The Revolutionary Diet," "Blast the Sugar Out," and several other books on diet and fitness. He is an expert on nutrition and exercise, and a well-known media personality from his time as host of "The Doctors" and medical contributor on "The Rachael Ray Show."

Expert Tip of the Day

The 1 Thing a Doctor Wants You to Do After a Big Holiday Meal

In TODAY.com's Expert Tip of the Day, a doctor reveals the one health-boosting activity he wants people to do on Thanksgiving.

Forks, knives, and spoons lined up against a green background.

Expert Tip of the Day

Are Full-Body Strength Workouts or Split Training More Effective? Experts Weigh in

In TODAY.com's Expert Tip of the Day, a trainer reveals the pros and cons of full-body strength workouts and how results compare to when you only strength train one area at a time.

Running sneakers, water bottles, and weights repeating in a pattern against a green background.

Expert Tip of the Day

The Easiest Way to Spot the Difference Between Processed and Ultraprocessed Foods

In TODAY.com's Expert Tip of the Day, a doctor shows you how to quickly spot foods that have been linked to poor health outcomes.

Forks, knives, and spoons lined up against a red background.

Expert Tip of the Day

What's the Best Time After a Workout to Eat Protein to Build Muscle?

In TODAY.com's Expert Tip of the Day, a doctor and fitness expert shares the best time window to eat protein in order to build muscle while strength training.

Forks, knives, and spoons lined up against a blue background.

Diet & Fitness

Should You Be Doing Full Body Workouts or Split Training? An Expert Explains

A doctor on how to split your strength training routine for a more effective, efficient workout.

Diet & Fitness

6 Alternative Exercises to Try If You Hate Pushups

Fed up with pushups? Try these 6 alternative exercises to strengthen the same chest, shoulder and core muscles.

Diet & Fitness

17 Foods to Add to Your Diet to See Better Strength Training Results

Eat these 17 foods rich in protein, healthy fats, and complex carbs to promote muscle growth and recovery while strength training, according to a doctor.

Plate of roasted salmon with leafy greens and sweet potato.

Diet & Fitness

5 Changes to Make to Your Strength-Training Routine to See Progress in 2 Weeks

These simple but effective changes to your strength-training routine will give you results in as little as two weeks, according to fitness expert Dr. Ian Smith.