Dr visit & laxatives. After clearing constipation with laxatives, and seeing a doctor if the symptoms are persistent, recurrent, unusual, or worrisome; one can eat breakfasts of carrots, onions, greens, cauliflower, and strawberries . . . All of which are reported to have biotin and fiber (fiber may help prevent constipation). Biotin pills probably won't help resolve constipation, but the veggies and fruits can help.