Advantage Diets
Your Personality Approach to Healthy Living
“Know your type to improve your life”
Lose weight, exercise, reduce stress, and make good decisions to have a healthy lifestyle

RobertaSchwartzWennikMSRDRoberta brings something unique to the dietetic profession – she is an expert in the MBTI® (Myers-Briggs Type Indicator®), as well as a registered dietitian.  She combines the two fields to present a personality approach to health. Roberta likes to say “know your type and you can improve your life”.

She is also the holder of a U.S. patent for the innovative nutrient monitoring system, Drawing the Line on Calories, Carbs, and Fat.  Through testing and research at the University of Washington, this system was shown to have statistically significant effect in helping people make healthy changes to their lifestyle habits.

Roberta did her undergraduate work at the University of California at Berkeley.  She received her master’s degree in Nutrition from the University of Washington, followed by her certification and RDN credentials from the Academy of Nutrition and Dietetics.  She then became a certified practitioner of the MBTI®.

She loves to write as you can see from the many books and popular magazine articles she has authored.  At heart, she is a teacher no matter whether it’s speaking to a group of people, in front of a classroom, or sharing her knowledge in her books.

Roberta and her husband, Larry, started the company, Affordable Editing Services at to help others achieve their dream of having their work published, whether it be a book, blog posts, magazine articles, etc.  As they like to say, “no author should be without an editor and coach”.


To view each book, click here.


Changing for Good

Labyrinth Publishing Works (2020)

Everything we do is based on decision we make. Choosing to live a healthy life is a decision. Learn how to use personality type to make the right ones. The choice is yours!







Intuitive Living

Labyrinth Publishing Works (2019)

The concept of becoming “intuitive” has become mainstream. While intuitive has much to do with being “mindful”, it has even more to do with using who you are according to your personality type to make the healthiest changes for yourself.






To Eat or Not To Eat, That Is the Question by Roberta Schwartz Wennik, MS, RDN


To Eat or Not to Eat, That is the Question

Labyrinth Publishing Works (2014)

So you want your cake and eat it too!  That really is the “proverbial cake question” that you have to ask whether it’s cake or whatever else. If you’re hungry, the question only remains “what” not “if”. If you’re not choosing wisely, you may find this book of enormous help.




Your Personality Lifestyle by Roberta Schwartz Wennik, MS, RDN


Your Personality Lifestyle

Labyrinth Publishing Works (2011)

Learn about all 16 types – the individual approaches to eating, exercise, and stress reduction. This book is perfect for the healthcare professionals. You should know your clients better to serve them better.





Your Personality Diet by Roberta Schwartz Wennik, MS, RDN


Your Personality Diet

Labyrinth Publishing Works (2012)

Find the diet plan that’s right for your type.  Take the personality quiz on this site and then get the book that written just for you.






Drawing the Line on Calories, Carbs, and Fat by Roberta Schwartz Wennik, MS, RDN

Drawing the Line on Calories, Carbs, and Fat

Labyrinth Publishing Works (2006)

Drawing the Line is a patented monitoring system that gives users a connect-the-dots approach to tracking food intake and exercise. You no longer have to write everything down. Just draw lines between dots and create a picture of how you’re eating.





Boomer's Guide to Getting the Weight Off for Good

Boomer’s Guide to Getting the Weight Off for Good

Alpha Books (2004)

Baby boomers (and, actually, all adults) – you CAN take the weight off and keep it off permanently by taking your personality into consideration





Your Personality Prescription by Roberta Schwartz Wennik, MS, RDN


Your Personality Prescription

Kensington (1999)

Groundbreaking book that introduces the innovative concept of understanding personality type to improve your lifestyle habits.







Beyond Food Labels


Beyond Food Labels

Perigee (1996)

Shows consumers how to use the Daily Values listed on food labels. Over 1000 foods included.







Nutrition Facts for Better Bodies 

HealthEdco (1993)

An easy-to-read overview of basic nutrition facts.

What’s New on the Label?

HealthEdco (1993)

A pocket-sized booklet on understanding how to read and use the information on food labels.

Roberta’s articles have appeared in:

Wennik appears in Outlook, Elegant Bride, Fitness, Fit MagazineFit Magazine            Cooking Light

Fitness                        Elegant Bride

Eating Well               Mature Outlook




Roberta has been a spokesperson for such companies as Coca-Cola, Vitamin Water, and APRE (Alliance for Potato Research and Education).


For those in the Seattle area, you’ve heard her on Station 1150 KKNW, “You’re Talkin’ with Joe Schipacci”.


Roberta has appeared on television on PBS, Fox News and TLC, sharing good nutrition facts for the consumer.  Check out Media for some of her clips.


Roberta volunteers at the local community college, helping adults in the Adult Basic Education Department achieve their GED (General Education Development), a high-school equivalent diploma. Many people need support in reading, writing and math.  She also volunteers in her granddaughter’s class, finding a great joy  in seeing  kids’ eyes light up when they get that aha moment.  At heart, Roberta is a teacher, no matter what she’s doing or who she is working with.