Three weeks, a knife and a spoon.
GOOD.21 is a 21-day training programme you do at home. It teaches you how your blood sugar drives your energy and mood, and how easy, tasty meals help you take on life full of energy.
Sound familiar?
You're at your screen, reading the same sentence for the third time.
You ate two hours ago, and somehow you're back at the fridge.
On the sofa at last. Your first quiet moment, and no energy left for any of it.
There's a good chance your blood sugar is running the show here, and nobody ever explained to you how that works. Nutrition is the most underrated key to good health. But nobody teaches us. Not at school, not at the doctor's, nowhere. And yet it's the foundation your body is built on, day after day.
No lack of willpower, but of insight
In over 25 years in healthcare and health coaching, Tanja Thielen saw the same thing again and again: people who knew they needed to change something, but didn't understand how their body really works. Out of that frustration and fascination, she built the GOOD. method.
This book isn't a diet or a cookbook. It's a three-week training programme you do at home, one that teaches you how your blood sugar drives your energy and mood, why your gut has a say in how you feel, and how, as long as you can handle a knife and a spoon, you can make easy, tasty meals your body really needs.
Every day is worked out for you: what you eat, why you eat it, and what happens inside your body along the way. There's nothing to research and nothing to plan. And because you understand why it works, you'll keep it up long after the 21 days are done.
How it works
You cook along for 21 days
Breakfast, lunch and dinner every day, fully worked out. Easy recipes, everyday ingredients, food that makes you happy.
You learn the system as you go
A bite of knowledge each day about your blood sugar, your gut and your energy. Small portions of theory you taste on your plate that same day.
After 21 days, you take it from there
Repeat, vary, build your own GOOD. lifestyle. The flex space and the GOOD. Recovery Test make the programme yours.
What's inside GOOD.21
21 days
training at home, step by step
63 recipes
breakfast, lunch & dinner
17 GOOD. Treats
sweet and savoury, for when cravings hit
5 Signature Recipes
you'll use every week
GOOD. Reset
the 5-day reset protocol
Recovery Test
tailors the programme to you
Your calorie needs
calculated personally
Flex space
room to make it your own, unique to GOOD.21
And after that?
The afternoon slump that doesn't show up. The cravings that are no longer a fight. A mind that's still sharp come evening. And meals that don't feel like punishment.
Tanja Thielen
Health strategist and bestselling author. Over 25 years in healthcare and health coaching, and the same discovery throughout: when people understand how their body works, change starts happening on its own.
Frequently asked questions
Is GOOD.21 a diet?
No. You won't count points and you won't go hungry. In 21 days you learn how your body responds to food, with meals that are simply delicious. After three weeks you've got the system down and you take it from there.
Do I need to be good at cooking?
If you can handle a knife and a spoon, you can do this. The recipes are deliberately simple, with everyday ingredients from the supermarket.
Does it fit a busy life?
That's exactly what it's made for. There's nothing to figure out: every day is ready for you, from breakfast to dinner. The flex space gives you room for birthdays, dinners out and real weeks.
What happens after the 21 days?
By then you know the system and you make it your own: repeat, vary, build your own GOOD. lifestyle. Want to know where your quickest win is? Take the free GOOD. scan.
Which languages is the book available in?
English, Dutch and German, all three as paperbacks on Amazon.
Three weeks, a dose of motivation, a knife and a spoon.
That's all you need to take on life, full of energy.
Already have the book? The readers' page has the supplement protocol and all the studies.