How to Grow Taller at 17
At 17, roughly half of males have reached their final height and half have a small amount remaining. Nearly all females are done. The honest question at 17 isn't "how do I grow more" — it's "am I still growing at all, and if so, how do I not waste it?"
No false hope. No supplement pitches. Just the research, plainly stated.
How much growth is left at 17?
0–2 in
Approximately 50% of males have reached final height by 17; 95% are done by 19. Late maturers (puberty onset at 13–14) may still have 1–2 inches remaining. The typical growth rate at 17 for an active grower is 0.5–1 cm per year. Measuring the same height over two consecutive months is a strong indicator that growth has stopped or is negligible.
~0 in
For over 95% of 17-year-old females, growth is complete. Growth plates in the major long bones (femur, tibia) fuse in most girls between 14–17. The focus at 17 for girls is posture optimization — ensuring you're measuring and presenting your actual skeletal height, not a compressed version of it.
5 things that still work at 17
Whether you're still growing or near-complete, these are the highest-ROI actions.
Sleep — still foundational even if growth is winding down
Growth hormone continues to be released during sleep throughout your adult life — not just during puberty. For a 17-year-old male potentially in his final growth phase, each night of adequate slow-wave sleep maximizes GH output at a biologically unique moment. Beyond height, sleep at 17 has massive downstream effects on testosterone, cortisol regulation, cognitive function, and body composition. 8–9 hours is the target (AASM 2016). If you're averaging 6, you're losing significant optimization on multiple fronts.
Posture — the most underrated height factor at 17
By 17, most people have developed postural habits that subtract from their measured and perceived height. Thoracic kyphosis (rounded upper back) is nearly universal in heavy phone users. Forward head posture adds 10–12 lbs of effective weight on the cervical spine and compresses vertical height. Hip flexor tightness from hours of sitting creates anterior pelvic tilt, reducing the neutral lumbar curve and lowering effective standing height. The intervention: face pulls and band pull-aparts (3 sets, daily), thoracic extension over a foam roller (2 min, daily), couch stretch for hip flexors, and chin tuck exercises. This is achievable in 15 minutes and produces visible, measurable results in 3–6 months.
Build muscle — it changes your height perception
At 17, testosterone is at or near peak adult levels for males. This is the most hormonally favorable time in your life for building muscle. Muscle mass on a lean frame dramatically changes proportional appearance — broader shoulders, more developed traps, and better overall body composition make height less consequential in social and physical contexts. Full-body progressive overload training (squat, deadlift, press, rows, pull-ups) 3–4 days per week with adequate protein (1.6–2.2 g/kg/day) and calories is the framework. This is not a consolation prize — muscle building at 17 has compounding benefits that last decades.
Eat enough protein — important whether growing or not
If you're still in a final growth phase, protein supports bone matrix synthesis (collagen, osteocalcin). If growth is complete, protein supports muscle hypertrophy during your prime building window. Either way, 1.2–2 g/kg/day is the appropriate target depending on activity level. Whole food sources first (meat, fish, eggs, dairy, legumes). Protein supplements are fine as a top-up for athletes but not necessary for those hitting targets through food.
Get certainty — measure consistently and use the predictor
Height anxiety often persists at 17 due to uncertainty. Remove the uncertainty. Measure yourself at the same time each morning (immediately after waking) on the first day of each month — this controls for diurnal disc compression variation. Use a flat wall, a book, and a tape measure or a stadiometer if available. Track it. If the number doesn't change over 3 consecutive months, growth is effectively complete. Use our Height Predictor for a Khamis-Roche estimate of your final height — it helps contextualize where you are relative to your genetic potential.
3 things that don't work
At 17, you're the prime demographic for height pseudoscience. Here's the honest breakdown.
"I grew 3 inches at 22" content
You will encounter personal anecdotes — often in Reddit threads or YouTube comments — of people claiming to have grown 2–4 inches after 20. In most cases, these are late maturers who were already growing slowly at 20–21 (still within the biologically normal range for constitutional delay), people who hadn't measured accurately before, people who corrected significant postural issues, or simple fabrications. After growth plate fusion — which is confirmed by bone-age imaging — bone length cannot increase. If someone grew "at 22," their plates weren't yet fused, not a magic exception to biology.
Microfracture theories and "bone stimulation" programs
Some programs claim that repetitive impact causes micro-fractures that stimulate bone growth in adults. While bone remodeling is a real, continuous process, it responds to mechanical load by increasing bone density and cross-sectional area — not longitudinal length. The cells responsible for longitudinal growth (chondrocytes in the growth plate) are simply not present after plate fusion. Impact-based exercise is excellent for bone health; it won't add centimeters of height after plates close.
Extreme caloric restriction to "reset" growth
Some online content suggests prolonged fasting or caloric restriction followed by refeeding can trigger additional GH secretion that stimulates height gains. Fasting does acutely increase GH secretion — this is well-established — but the purpose is homeostatic (maintaining lean mass during caloric deficit), not anabolic for bone growth. At 17, if you're still growing, chronic caloric restriction is actively counterproductive — it suppresses IGF-1, which is the primary mediator of growth plate activity. Eat enough food.
When to see a doctor at 17
At 17, most growth-related medical interventions are near their last viable window. If you're a male who hasn't reached Tanner Stage 4 by 17 (significantly delayed puberty) or whose height is consistently below the 3rd percentile for age, a pediatric endocrinologist can still assess and potentially treat. Growth hormone deficiency diagnosed and treated before plates fuse (which in late maturers may extend to 19–20) can add measurable height. Don't wait until 18 assuming you'll figure it out then — the window is closing. A bone-age X-ray plus IGF-1 level takes one appointment to get clarity.
Know exactly where you stand
The Khamis-Roche predictor gives you a data-driven estimate of your adult height. The Growth Plate Quiz estimates where you are in the closure process based on observable Tanner stage markers.