Does Ashwagandha Increase Height?

Ashwagandha is everywhere right now — supplement aisles, TikTok wellness routines, and more than a few Reddit threads where teenagers are asking whether it can help them grow taller. The claims are compelling. The evidence is a different story.

Here’s the short version before we get into the biology: no credible clinical evidence shows that ashwagandha increases height in humans. Growth is driven by genetics, nutrition, sleep, and the status of your growth plates — none of which ashwagandha meaningfully changes. What it may do is support some general health functions that matter during development. But that’s a much quieter claim than “it makes you taller.”

Quick Answer

Ashwagandha does not increase height. No human clinical trials have demonstrated that it stimulates bone elongation or growth plate activity. Height is primarily determined by genetics — accounting for roughly 80% of variation — and by nutrition, sleep, and overall health during childhood and adolescence. Ashwagandha cannot override these biological limits.

Key Takeaways

• Ashwagandha has no proven effect on human height growth.
• Growth plates — the cartilage zones where bones lengthen — are controlled by hormones and genetics, not herbal supplements.
• Once growth plates close (typically in the mid-to-late teens), height cannot be meaningfully increased.
• Ashwagandha may support sleep quality and stress reduction, which have indirect relevance to healthy development.
• The habits that genuinely support height potential are the same ones that support everything else: sleep, protein, vitamin D, calcium, and regular physical activity.

What Is Ashwagandha?

Ashwagandha (Withania somnifera) is a root extract that has been used in Ayurvedic medicine for centuries. In the U.S., it’s now one of the top-selling herbal supplements, available in capsules, gummies, powders, and standardized extracts — usually standardized to withanolides, its active compounds.

The modern pitch centers on its classification as an adaptogen: a substance believed to help the body manage stress. Research has looked at ashwagandha for anxiety reduction, sleep, muscle recovery, and testosterone levels. Some of those findings are modestly promising. The height claim, though, isn’t one of them — it seems to have migrated from supplement marketing into social media without stopping to check whether any science backed it up.

How Height Actually Increases

Bone elongation happens at the epiphyseal plates — also called growth plates — located near the ends of long bones. During childhood and adolescence, these cartilage zones allow bones to grow longer in response to growth hormone (GH), released mainly by the pituitary gland, along with IGF-1 and sex hormones during puberty.

At the end of puberty, the growth plates gradually calcify and close. For girls, this typically happens between ages 13 and 15; for boys, somewhat later. After that, the structural opportunity for height increase is gone. That’s not pessimism — that’s just how skeletal maturity works.

Genetics account for roughly 60–80% of final adult height, according to a 2003 review by Silventoinen in the Journal of Biosocial Science (https://pubmed.ncbi.nlm.nih.gov/12664962/). A landmark 2022 genome-wide association study of 5.4 million people identified more than 12,000 genetic variants linked to height — the largest such study ever conducted (Yengo et al., Nature, 2022).

The remaining 20–40% comes down to environment: nutrition, sleep, physical activity, and chronic stress or illness. That’s where lifestyle and supplementation conversations make sense — but only within that ceiling.

Does Ashwagandha Increase Height? What the Research Says

No human clinical trial has tested ashwagandha’s effect on height as a primary outcome. None.

Most of the online speculation runs through two indirect pathways: the idea that ashwagandha raises testosterone (which does influence growth during puberty) and the idea that it improves sleep (which supports growth hormone release). Both pathways are real in a general sense. Neither has been shown to translate into measurable height gains.

The animal research occasionally cited in supplement marketing — mostly rodent studies — doesn’t transfer cleanly to human bone elongation. Rodent growth plates behave differently, and the doses used in animal studies are rarely comparable to standard supplement doses.

So where does the claim come from? Mostly from the association logic: “ashwagandha → better sleep/testosterone → more GH → taller.” Each arrow in that chain is weak to uncertain, and the final arrow — more GH in an otherwise healthy adolescent producing noticeably greater height — isn’t supported by evidence. Growth hormone therapy in clinically deficient children does increase height. Mild lifestyle-related GH fluctuations in healthy teens, though, don’t appear to produce the same effect.

The honest framing: there’s no reason to expect ashwagandha to increase height, and no clinical data suggesting it does.

Can Ashwagandha Support Growth Indirectly?

This is where the conversation gets a little more nuanced — and more honest.

Ashwagandha has reasonably good evidence for reducing cortisol levels (the stress hormone) and improving sleep quality in adults. Chronic stress and poor sleep are both known to suppress growth hormone secretion, particularly during the slow-wave sleep stages when GH pulses are most active (Shaw et al., NSF, 2023; Pediatric Research, 1989).

So in theory: if a teenager with severely disrupted sleep started sleeping better because of ashwagandha, their GH secretion could normalize, which might help them express more of their genetic height potential. The chain holds — weakly, conditionally, and only if they were meaningfully sleep-deprived to begin with.

That’s a far cry from “ashwagandha makes you taller.” It’s more like: “Ashwagandha might help some teenagers sleep better, and sleep is genuinely important for growth.” Which is true but doesn’t require ashwagandha specifically — it requires sleep.

Common Myths About Ashwagandha and Height

Myth 1: “TikTok said teenagers grew inches after taking it.”
Teenagers grow. That’s what puberty does. Attributing growth that would have happened anyway to a supplement taken simultaneously is textbook confirmation bias — and supplement brands know exactly how to use it.

Myth 2: “It increases HGH, so it must increase height.”
Even if ashwagandha produced meaningful GH increases (which hasn’t been clearly demonstrated), higher GH in a healthy adolescent doesn’t automatically produce more height. The system isn’t that simple. GH works on open growth plates with adequate nutrition — it’s not a dial you can turn up with a gummy.

Myth 3: “It worked for me.”
Anecdotal. People grow during puberty regardless of what they take. Without a controlled comparison, it’s impossible to know whether ashwagandha had anything to do with it.

Myth 4: “Natural supplements are safer and work the same as HGH.”
Prescribed human growth hormone is used clinically for children with verified GH deficiency — it’s a tightly monitored treatment, not a supplement. Ashwagandha operates through entirely different mechanisms and has no comparable evidence base for height.

What Actually Helps Children and Teens Reach Their Height Potential

The habits that support healthy growth during the years when it’s still possible aren’t complicated. They’re also not exciting, which is probably why supplement companies exist.

Sleep is the one most people underestimate. Growth hormone is released in pulses during slow-wave sleep — not as a steady trickle throughout the day (Frontiers in Endocrinology, 2023). Most American teenagers get nowhere near the recommended 8–10 hours. That gap is real and worth closing.

Protein and calcium matter more than most supplements. A 2016 review in Nutrition Reviews found that nutrition is the most important external factor for linear growth (Perkins et al.). Lean meats, dairy, eggs, and legumes cover most of what growing bones need. Protein and height growth are closely linked during adolescence — shortfalls here have real consequences.

Vitamin D and calcium work together. Bone mineralization during growth depends on both. Vitamins for height growth — particularly vitamin D and calcium — are among the most evidence-backed nutritional supports for development.

Physical activity builds bone density. Weight-bearing exercise stimulates bone formation in adolescents, according to a 2025 systematic review in Frontiers in Pediatrics (PMC). The best sports to boost height aren’t magic — they just keep kids active and load the skeleton in useful ways. Similarly, questions about whether does weight training stunt growth come up a lot — the answer is no, provided technique and load are appropriate.

What to avoid. A few things genuinely do interfere with growth. Does smoking stunt growth — yes, the evidence for nicotine’s negative effect on growth is reasonably consistent. Does sugar stunt growth — high sugar intake is associated with poorer diet quality and lower height-for-age in US children (Kim & Keen, Nutrients, 2021).

For a full overview of the basics, 9 science-backed tips to grow taller covers the evidence on everything from sleep to posture without the supplement-aisle hype.

Is Ashwagandha Safe?

For most healthy adults, ashwagandha appears to be safe at standard doses for short to medium-term use. The side effect profile is generally mild — digestive upset is the most commonly reported issue.

A few groups should be more cautious:

• People with thyroid conditions. Ashwagandha may affect thyroid hormone levels, so anyone on thyroid medication should check with their doctor first.
• Pregnant and breastfeeding individuals. Safety data is insufficient.
• Children and younger teens. Most research is in adults. Pediatric safety data for ashwagandha is limited — which is reason enough for parents to be careful before giving it to a growing child.
• Anyone on sedatives, immunosuppressants, or thyroid medications. Interactions are possible.

The FDA does not evaluate dietary supplements for safety or effectiveness before they hit shelves. If you’re choosing an ashwagandha product, look for third-party testing from organizations like NSF International or USP.

Frequently Asked Questions

Can adults grow taller with ashwagandha?
No. Once growth plates close — typically by the late teens — height cannot increase through any supplement, including ashwagandha. Adult height is fixed at skeletal maturity.

Does ashwagandha increase HGH levels?
No reliable human evidence supports this. Some animal studies suggest effects on hormonal pathways, but those findings haven’t translated into demonstrated HGH increases in human clinical trials.

At what age is height growth still possible?
Growth plates typically close between ages 14–16 in girls and 16–18 in boys, though there’s individual variation. When girls stop growing and when boys stop growing covers the biology in more detail.

How long does ashwagandha take to show effects?
Studies on stress and sleep outcomes typically show effects after 4–12 weeks of consistent use. For height — no timeframe applies, because the effect doesn’t exist.

Are there any supplements that actually increase height?
For children with diagnosed growth hormone deficiency, prescribed GH therapy can meaningfully improve height outcomes. For healthy children and teens, no over-the-counter supplement has demonstrated the ability to increase height beyond genetic potential. Adequate nutrition — including foods that help you grow taller — is a more grounded approach.

Can short parents have tall children?
Yes. Genetics are complex. Short parents and tall children explores how inherited height potential plays out across generations.

Final Verdict: Does Ashwagandha Increase Height?

No. The biology doesn’t support it, and no human clinical trial has demonstrated otherwise.

Ashwagandha is a legitimate supplement with real benefits in specific areas — stress, sleep, possibly muscle recovery. But height isn’t one of them. Growth requires open growth plates, adequate nutrition, sleep, and time — and of those, ashwagandha reliably delivers none.

If a teenager is worried about their height, the more productive questions are: Are they sleeping enough? Are they getting enough protein and calcium? Is anything in their environment — chronic stress, poor nutrition, smoking — actively working against their growth? What can stunt your growth is worth reading before reaching for any supplement.

For most healthy teens, the ceiling is set by genetics. The job is getting as close to that ceiling as possible — through habits, not bottles.

Orianna Lux, MS, RDN Medically Reviewed by Expert

Registered Dietitian Nutritionist | Pediatric Growth & Nutrition Specialist

Orianna is a Registered Dietitian Nutritionist with a Master's degree in Human Nutrition and over 8 years of clinical experience specializing in pediatric growth, childhood nutrition, and height development.

MS in Human Nutrition Registered Dietitian Nutritionist (RDN) Pediatric Nutrition Specialist 8+ Years Clinical Experience Evidence-Based Practice

Last updated: July 22, 2026