If you're searching "how to keep growth plates open," you deserve an honest answer — not hype. So here it is up front: you can't force your growth plates to stay open. Their closure is controlled by hormones, mainly estrogen, at the end of puberty — in both boys and girls.
But that's not the end of the story. What you can do is avoid the things linked to earlier closure, and make the absolute most of the time your plates are open. That difference is real, and it's worth centimeters.
What Growth Plates Actually Are
Growth plates (epiphyseal plates) are layers of cartilage near the ends of your long bones — femur, tibia, spine vertebrae. New bone forms at these plates, which is literally how you get taller.
At the end of puberty, rising estrogen levels cause the cartilage to be replaced by solid bone. Doctors call this "fusion" or "closure." Once a plate is fused, that bone can't grow longer. No exercise, stretch, supplement, or device changes that.
Typical closure ages:
- Girls: around 13–15 (about 2 years after their first period)
- Boys: around 15–17, sometimes up to 18–19
Want the full timeline? Read When Do Growth Plates Close? Age Timeline for Boys and Girls.
What Actually Influences Closure Timing
Closure timing is mostly genetic — you'll likely follow a similar pattern to your parents. But research points to a few factors that can shift puberty (and therefore closure) earlier or later:
1. Body Weight and Early Puberty
Higher childhood body fat is associated with earlier puberty, especially in girls. Earlier puberty means the estrogen surge — and plate closure — arrives sooner. Maintaining a healthy weight through balanced eating and daily activity supports a normal puberty timeline.
2. Chronic Under-Eating Delays Growth (Not in a Good Way)
Some teens think eating less might "delay puberty" and keep plates open longer. In reality, under-eating slows growth while the plates are open — you end up growing less per year, not growing for longer in any useful way. Restrictive dieting during your growth window is one of the most damaging things you can do to your final height.
3. Sleep and Hormone Rhythms
Growth hormone is released in pulses during deep sleep. Poor sleep doesn't close plates faster, but it wastes the open-plate years you have. Teens need 8–10 hours; most get under 7. Our guide on sleep and height growth covers exactly how to fix this.
4. Things Linked to Earlier Closure or Stunted Growth
- Anabolic steroids — can cause premature growth plate fusion. Permanent.
- Smoking and vaping — associated with reduced adolescent growth.
- Untreated hormonal conditions — if you're far behind or ahead of the typical timeline, a pediatric endocrinologist can check thyroid, growth hormone, and puberty status.
What To Do While Your Plates ARE Open
This is where the real opportunity is. Two teens with identical genetics can end up inches apart based on how they use their growth window.
The checklist:
1. Sleep 8–10 hours, consistently — growth hormone does its work at night
2. Eat enough protein (50–65g/day) and calcium (1,300mg/day) — bones need raw material
3. Get vitamin D — sunlight, fortified milk, or supplements if your doctor confirms a deficiency
4. Move daily — activity supports bone density and healthy hormone levels; see growth plate exercises that actually work
5. Fix your posture — it won't change bone length, but it can reveal 1–2 hidden inches
6. Don't smoke, vape, or touch steroids — the only "hacks" here are avoiding harm
What Doesn't Work (Save Your Money)
- "Growth plate reopening" supplements — nothing sold online reopens fused plates
- Stretching to "keep plates open" — stretching helps posture, not plate timing
- Hanging devices and inversion tables — temporary spine decompression only
- HGH bought without prescription — dangerous, illegal, and ineffective after fusion
How Do I Know If My Plates Are Still Open?
Age is a rough guide, but the only certain answer comes from a bone-age X-ray. There are also practical signs — recent growth, shoe size changes, where you are in puberty. We break them down in 7 Signs Your Growth Plates Are Still Open.
You can also get a realistic estimate of your remaining growth using your parents' heights and your current stats — that's exactly what the TallerTeen app's height estimate does, using the same mid-parental method doctors use.
The Bottom Line
You can't keep your growth plates open by force — but most teens lose far more height to bad sleep, poor eating, and inactivity than they ever would to early closure. Control what you can control, while you still can.
Sources: NIH Puberty & Growth Research, AAOS OrthoInfo Growth Plate Guide, CDC Growth Charts, NIH Vitamin D Fact Sheet.