Both acacia and psyllium fiber likely offer similar health benefits. Psyllium fiber has been studied more extensively and is commonly used to help manage constipation, diarrhea, cholesterol levels, and blood sugar levels. However, the limited research on acacia fiber so far suggests it may provide similar benefits.Both acacia and psyllium fiber likely offer similar health benefits. Psyllium fiber has been studied more extensively and is commonly used to help manage constipation, diarrhea, cholesterol levels, and blood sugar levels. However, the limited research on acacia fiber so far suggests it may provide similar benefits.