This version uses higher protein flour such as almond flour and uses no refined sugar. (macrobalanced.com)
However, the breads made with the higher protein bread flours generally had a lot less taste than those made with lower protein flours. (sourdoughhome.com)
I think you could try replacing the almond flour with flaxseed meal or just another high protein flour like quinoa. (simplyquinoa.com)