SINGAPORE — Older people need more protein, but eating enough of this essential macronutrient can get harder as you age. Three years ago, freelance writer and editor Heidi Yeo started prioritising protein to help her maintain muscle mass. Now 58, she cut down on bread, rice and noodles. She eats sunflower seeds, hard-boiled eggs and sliced tofu as snacks. The results have been encouraging. Her diabetes is under better control, with her blood sugar levels measured by the HbA1c test falling from around nine to 6.8 after the dietary change. National health portal HealthHub suggests that people with diabetes target levels of seven or lower…