Grains that keep their bran
Whole grains in an Indonesian context
Biji-bijian utuh means grains that keep their bran and germ, like oats, brown rice, and whole wheat bread. You don't have to abandon white rice. Swapping one meal a day, or mixing brown and white in the same pot, is a realistic move most people can hold.
Oats at breakfast is another low-effort option, and corn or sweet potato counts toward variety too. The point is variety across the week rather than a strict rule. If whole grains are new to you, start with the one you actually like the taste of and build from there.
Build everyday vitality habits