Growth tonics alone don't directly increase height; they help maximize growth potential. Reported effects: ① children below average height: 4–7cm/year (vs untreated peers), ② sleep, exercise, nutrition guidance combined: 5–10cm/year possible, ③ already-tall children: marginal effect. Improvement in immunity, sleep, and digestion are bonus effects. Final adult height depends on genetics, nutrition, exercise, and sleep — not herbs alone.