Height and growth claims: why they are not substantiable

Height products are one of the largest supplement categories in India, sold to anxious parents and to teenagers who are shorter than their friends.

We manufacture children’s products and we decline to make these. This article explains why, in terms of what determines height and what the biology actually permits.

This is information, not medical advice. A child growing slowly needs a paediatrician and a growth chart, not a supplement. Short stature has treatable causes and they are found by assessment.

What actually determines height

Genetics is the dominant factor. Estimates of heritability for adult height are high, most of the variation between people in a well-nourished population is genetic.

Nutrition is the main modifiable factor, and it matters most in the first few years of life and then again through puberty.

Also relevant: chronic illness, hormonal conditions, sleep, physical activity, and the mother’s health during pregnancy.

And at a population level nutrition clearly matters, average heights have risen substantially in many countries over generations as nutrition improved, and India’s own average has shifted. That is real.

But it is a population-level, childhood-long effect, not something a tonic produces in an adolescent.

The fact that ends the whole premise

Growth happens at the growth plates (epiphyseal plates), cartilage zones near the ends of long bones.

At the end of puberty, these plates close. The cartilage is replaced by bone, and the bone can no longer lengthen.

After that, no nutrition, no hormone, no supplement and no exercise increases height. This is not a matter of degree; the structure that produces length no longer exists.

Typical timing: closure generally occurs in the mid-to-late teens, earlier in girls than boys, and it varies between individuals. It is confirmed on an X-ray, a bone age assessment, which tells a doctor whether the plates are open and roughly how much growth potential remains.

Which means:

For an 18-year-old asking whether a product can add inches, no. The answer is anatomical, not a matter of evidence quality.

And this is precisely who these products are marketed to, because that is the age at which people are most distressed about their height.

What the ingredients in these products are

Open a height product and you will typically find:

Calcium, vitamin D, vitamin K, magnesium, zinc, nutrients with genuine roles in bone health.

Protein or amino acids, notably L-arginine and L-ornithine, included because they have been studied in relation to growth hormone release.

Ashwagandha, shatavari, moringa, bala, vidarikand, Ayurvedic herbs with traditional balya (strengthening) use.

And sometimes a long ingredient list with impressive names at token amounts.

The arginine point, since it is the mechanism most cited

L-arginine does stimulate growth hormone release, this is real, and it has been used in clinical settings as a provocative test of growth hormone reserve.

But: the effect is a transient spike from an intravenous or large oral dose, in a test setting. A brief rise in growth hormone is not the same as increased height, and no trial has shown that oral arginine supplementation increases adult height in healthy children.

This is the category’s central move: take a real biochemical fact, and let the customer infer an outcome it does not produce.

Why the claim cannot be substantiated

Four reasons, each sufficient on its own.

1. The growth plates. For anyone past puberty, the claim is anatomically impossible.

2. No trials show it. There are no credible randomised trials demonstrating that a nutritional supplement increases adult height in adequately nourished children. The studies cited are typically about correcting deficiency, or about growth hormone in diagnosed deficiency, which is a different thing entirely.

3. The confound that makes testimonials worthless. Children grow anyway. A 13-year-old who takes a product for a year and grows 7 cm would have grown. Attributing normal growth to a product is the easiest false claim in the entire supplement industry, because the outcome happens regardless.

This also explains why these products appear to work, and why parents recommend them to each other in good faith.

4. Deficiency correction is not growth promotion. If a child is genuinely malnourished, or deficient in vitamin D, protein, zinc or iron, correcting that allows normal growth to proceed. That is real and important, and it is not the same as making a well-nourished child taller than their genetics would allow.

And the marketing deliberately blurs this, because “helps a malnourished child reach their normal potential” is true and sells less than “increases height”.

And in India, it is a compliance problem

Height increase is a claim about altering the structure of the human body, and claims of that kind fall within the scope of what the Drugs and Magic Remedies (Objectionable Advertisements) Act restricts in advertising to the public.

On an FSSAI licence, it is a disease-or-function claim that cannot be substantiated and so cannot be made.

Imagery counts too, a measuring scale, a height chart, a shorter child beside a taller one. These make the claim the words avoid.

And endorser liability under consumer law now extends to the people who promote such products.

So this is not only unsupportable; it is a category with real regulatory exposure, and it is one we will not manufacture for.

What genuinely helps a child grow

This is the useful part, and it is all unglamorous.

Nutrition, with the right emphasis

Adequate total energy. A child who is not eating enough overall will not grow well, whatever the micronutrients.

Protein at every meal. Milk, curd, paneer, eggs, dal, soya, fish, chicken. Indian vegetarian children’s diets are often lower in protein than assumed, and this is the single most relevant nutritional lever.

Vitamin D, very commonly deficient in India, and directly relevant to bone growth. Severe deficiency causes rickets, which still occurs here. Test and supplement at a paediatrician’s dose.

Calcium, from dairy, ragi, sesame, moringa, almonds.

Iron, deficiency is extremely common in Indian children and affects growth, energy and school performance. Test ferritin, not just haemoglobin.

Zinc, deficiency is associated with growth faltering, and correcting it in deficient children helps.

Vitamin A and iodine, both matter, and iodine deficiency specifically affects growth and development.

And deworming, intestinal worms are still common, affect nutrition and growth, and treatment is a single inexpensive dose. Many paediatricians deworm periodically as routine.

Sleep

Growth hormone is secreted predominantly during deep sleep, particularly in the early part of the night.

This is a genuine mechanism, and it makes adequate sleep one of the few real, free interventions here. School-age children and adolescents need considerably more sleep than they typically get, and late screens are the usual culprit.

Physical activity

Being active supports normal growth and bone development. Running, jumping, climbing, sport.

And a specific myth worth correcting: hanging from a bar, stretching and “height exercises” do not lengthen bones. They can improve posture, and improved posture does make someone stand at their actual height, which is sometimes worth a centimetre or two of apparent height. That is a real, small, honest benefit and it is not bone growth.

And the opposite myth: weight training does not stunt growth in adolescents when done with proper technique and supervision. This belief is widespread and keeps teenagers away from useful exercise. Poor technique with heavy loads can injure a growth plate, which is an argument for coaching, not avoidance.

And treating what is underneath

Chronic conditions that impair growth and are treatable: coeliac disease (increasingly recognised in India, and growth faltering can be the presenting sign), inflammatory bowel disease, chronic kidney disease, chronic infection including tuberculosis, uncontrolled asthma on long-term steroids, congenital heart disease, hypothyroidism, and growth hormone deficiency.

When a child’s height needs a doctor

This is what parents should act on instead of buying a product.

See a paediatrician if:

• The child is crossing downwards across growth percentiles on a plotted chart, this is the key finding, and it requires measurements over time rather than a single reading
• Height velocity has slowed, growing less than expected per year
• Significantly shorter than expected for the family, doctors use a mid-parental height calculation
• Height and weight are both faltering
• Puberty is delayed, or started very early
• Disproportionate body proportions
• Other symptoms, chronic diarrhoea, bulky foul stools, recurrent infections, chronic cough, fatigue, headaches, visual problems
• Any chronic illness

What a proper assessment involves: plotted growth chart, mid-parental height, examination, and tests, thyroid function, coeliac screen, full blood count and ferritin, vitamin D, kidney and liver function, and a bone age X-ray which shows whether the growth plates are still open.

And where growth hormone deficiency is diagnosed, growth hormone treatment exists and works, under an endocrinologist, with monitoring. That is the real treatment, and a child who needs it and gets a herbal tonic instead loses the years in which it would have worked.

That is the harm in this category. Not that the powder does nothing, that a treatable cause goes undiagnosed during the only window in which height can still change.

What we will and will not do

We decline to manufacture products marketed for height increase, and we decline artwork with height charts, measuring scales, or comparative-height imagery.

What we will make, and say: children’s nutritional products with the recognised roles of calcium and vitamin D in normal growth and development of bone in children, protein’s role in growth, and the recognised functions of iron, zinc and the B vitamins. These are established nutrient function claims and several are specifically permitted for children’s growth and development.

That is a genuine, defensible claim, nutrients supporting normal growth, and it is materially different from promising added height.

And we ask for a referral line: that a child not growing as expected should see a paediatrician with a plotted growth chart.

This costs us a large category. Height products sell well to worried parents. We think the trade is clear.

The short version

1. Height is mostly genetic. Nutrition is the main modifiable factor, and it acts across childhood rather than through a tonic.
2. Growth plates close at the end of puberty. After that nothing increases height, this is anatomical, not an evidence question.
3. These products are marketed mainly to people past that point.
4. L-arginine does cause a transient growth hormone rise, and that is not the same as increased height. No trial shows otherwise.
5. Children grow anyway, which makes testimonials in this category worthless and explains why parents believe in them.
6. Correcting deficiency allows normal growth; it does not exceed genetic potential. The marketing blurs these deliberately.
7. Height claims fall within the Magic Remedies Act’s advertising restrictions, and imagery counts.
8. What genuinely helps: enough total food, protein at every meal, vitamin D, calcium, iron (test ferritin), zinc, deworming, and sleep, growth hormone is secreted mostly in deep sleep.
9. Hanging and stretching do not lengthen bones, they can improve posture, which is a small honest benefit.
10. Weight training does not stunt growth with proper technique, this myth keeps teenagers from useful exercise.
11. The real action is a plotted growth chart and a paediatrician, looking for coeliac disease, thyroid problems, chronic illness or growth hormone deficiency, all treatable, and only within the growing years.

Products in this range: kids appetite drops and vitamin D3 drops. Related: when poor appetite in a child needs a paediatrician.