Does Milk Make You Taller?

Milk won't make you taller than your genes allow, but it can help you reach that height while you're still growing. Milk supplies calcium, protein and other nutrients that growing bones need. In controlled trials, extra milk adds little or no height in kids who already eat well, with somewhat larger effects in teens and in children who were short for their age.

Does milk make you taller?

Your adult height is mostly set by your genes. Nutrition, sleep and overall health decide whether you reach that genetic potential while your growth plates are still open. Milk fits into the nutrition part: it's one convenient source of nutrients that support growth, not a height booster on its own.

So the honest answer is: drinking milk helps if your diet would otherwise fall short, and adds little if you already get enough calcium, protein and calories from other foods.

What the studies actually show

Researchers have tested milk and height in several ways. The results are more modest than the "drink milk, grow tall" message suggests.

Put together, extra milk seems to matter more for teens and for kids who are short for their age, and little for kids who are already well nourished. In the 2019 analysis of 2,844 children and teens without undernutrition, there was no measurable height gain.

Milk, protein and IGF-1

One reason scientists think milk might help growth is IGF-1 (insulin-like growth factor 1). This hormone works with growth hormone to make bones longer at the growth plates.

In a Danish study, 24 eight-year-old boys drank about 6 cups (1.5 L) of skim milk a day or ate the same amount of protein as lean meat for one week. IGF-1 rose by 19% in the milk group, but not in the meat group. The researchers suggested something in milk itself, not just its protein, stimulates IGF-1.

This doesn't mean milk raises adult height. The study was tiny, lasted one week, used far more milk than anyone should drink, and didn't measure growth. A higher IGF-1 level for a week is not the same as ending up taller.

Does milk help you grow taller during puberty?

The teen years are when nutrition matters most for growth. The 2025 to 2030 Dietary Guidelines for Americans describe adolescence as a rapid growth period with higher needs for energy, protein, calcium and iron, and say enough calcium and vitamin D is vital for building peak bone mass.

Keep in mind what calcium does. It mainly makes bones strong and dense. Bone length comes from the growth plates, driven by your genes, hormones and overall nutrition. A teen who gets enough calories and protein but skips milk can still reach full height by getting calcium elsewhere.

How much dairy do teens need?

The current Dietary Guidelines set a goal of 3 servings of dairy a day as part of a 2,000-calorie eating pattern, adjusted for your energy needs, and recommend dairy with no added sugars. Energy needs rise during the teen growth spurt, so active, fast-growing teens often need more food overall.

Teens aged 9 to 18 need 1,300 mg of calcium a day. Each of these gives about 300 mg:

• 1 cup (8 oz or 240 mL) of milk
• 6 oz (170 g) of yogurt
• 1.5 oz (45 g) of cheese
• 1 cup (8 oz or 240 mL) of calcium-fortified soy milk

Three servings get you to about 900 mg. The rest can come from other foods like leafy greens, tofu, beans, fortified cereals and canned fish with soft bones.

Lactose intolerant or don't drink milk?

Lactose intolerance doesn't stop you from growing. According to the NIH, many people with lactose intolerance can handle about 12 grams of lactose, roughly 1 cup of milk, with mild symptoms or none, especially if they spread dairy through the day and have it with meals.

Other options:

• Lactose-free milk and yogurt: the NIH says they're just as healthy as regular milk products.
• Yogurt and hard cheeses like cheddar and Swiss, which are naturally lower in lactose.
• Calcium-fortified soy milk, which matches cow's milk for calcium.
• Non-dairy calcium sources: canned salmon or sardines with soft bones, leafy greens, broccoli, tofu, dried beans, almonds, and fortified cereals or juices.

If you use oat, almond, rice or coconut milk, check the label: calcium, vitamin D and protein vary a lot by brand. For more ideas, see foods that help you grow taller and our guide to vitamins and supplements for height.

Bottom line: Milk is a helpful growth food, not a height hack. Getting enough calcium, protein and calories, from milk or other foods, is what lets you reach your genetic height.

What actually decides how tall you'll be

Genes come first. Your parents' heights give a rough target range, which you can estimate with our mid-parental height calculator. On top of that, you reach your potential by eating enough overall, sleeping 8 to 10 hours, staying active and treating any health problems that slow growth. Our guide on how to grow taller covers all of these.

When to see a doctor

Talk to a doctor if:

• You haven't grown in a year, or you're dropping across percentile lines on the growth chart
• You're much shorter than what your parents' heights would suggest
• You show no signs of puberty by about 14 (boys) or 13 (girls)
• Milk or other foods regularly cause belly pain, bloating, diarrhea or weight loss, especially along with slow growth

Gut symptoms with poor growth can point to a condition like celiac disease rather than simple lactose intolerance, and that needs a proper diagnosis. A doctor or dietitian can also help if allergies or a vegan diet make it hard to get enough calcium and protein.

The takeaway

Milk doesn't make you taller than your genes allow, and skipping it won't stunt you if you get the same nutrients elsewhere. Aim for about 3 servings of dairy or fortified alternatives a day, eat enough overall and sleep well while you're still growing.