Surgeons use three types of grafts strategically:
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Single follicular units (1-2 hairs): ideal for hairline refinement and the most natural frontal appearance.
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Single follicular units (2-3 hairs): the most common naturally occurring size.
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Bi-follicular units (3-4 hairs): essential for creating density, with research showing better survival rates than ultra-thin grafts.
For many patients, using some bi-follicular units alongside single follicular units can produce better outcomes: better graft survival, enhanced density, and particularly improved results for patients with curly, gray, or fine hair, or those covering larger areas. When you compare quotes, ask how many hairs the plan will move, not only how many grafts, and whether graft sizes are chosen for your clinical needs rather than to reach a count.