Our bestsellers
K12 - Building Shake
Natural building shake with high-quality whey protein, coconut milk and coconut blossom sugar – for healthy weight gain, energy and well-being.
Natural ingredients
- High in calories and protein
- Pleasantly creamy taste
- Free Shipping
- Secure payment
- 14 days return
Mission Statement
K12 inspires and supports people to gain healthy weight, energy and zest for life.
With honest, sustainable products and a clear message, we raise awareness of underweight, give new courage, and help people feel at home in their own bodies again.
Our goal: more strength, more self-confidence – more of you.
This is what K12 stands for
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Honest & transparent -
Act sustainably -
Quality without compromise -
Empathy & Respect -
Strengthening self-confidence -
naturalness
What our customers say
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Finally a shake that delivers what it promises!
I've been wanting to gain some weight in a healthy way for a while, but many shakes taste artificial or are too sweet. The K12 Shake is completely different – creamy, natural, and truly delicious! After a few weeks, I noticed that I felt fitter and stronger. Highly recommended!
Sandro M. -
Great for everyday use and after training
I usually drink the shake after exercise or in between meals when I don't have time to cook. It's super easy to digest, fills you up, and gives you energy. I especially like that the ingredients are natural and there's no artificial additives in it.
Laura R. -
More self-confidence through greater well-being
After a stressful period, I lost weight and wanted to find something that would help me build up a healthy body. With K12, I've finally found a product that helps me feel good in my body again. I love the honest philosophy behind the brand!
Carlo W.
