Health Tips
Summer vacation becomes a bottleneck period for growth?
U.S. Study Reveals 4 Major Reasons for Growth Stagnation
26 August 2025
Summer vacation is the most anticipated time for children, free from academic pressure, and should be an ideal period for height growth. However, a 2022 U.S. study involving 7,000 children aged 5 to 11 found that during summer vacation, children's height growth rate slowed by about 0.26 cm per month compared to the school term, and it may even be accompanied by weight gain, leading to "not growing taller but getting heavier." Why does this happen? It turns out that daily habits during summer vacation are quietly hindering children's growth! This article will reveal the four major reasons for height stagnation and how to help children break through this bottleneck to seize the golden period for growth.
4 Major Causes: Summer Habits That Stall Height Growth
Research shows that the slowdown in height growth during summer break isn’t due to genetics or weather but rather changes in daily routines. These seemingly minor habits directly impact growth hormone secretion and bone development. Here are the four key reasons:
1. Disrupted Schedules Miss the Growth Hormone Window
During summer break, kids often stay up late playing on phones or watching TV, leading to poor sleep quality. Growth hormones are primarily secreted between 10 PM and 2 AM, and missing this “golden window” hinders bone growth. Studies indicate that children with irregular schedules experience 20% slower height growth during summer compared to the school year. Without parental supervision, long-term poor habits can significantly affect development.
2. Reduced Physical Activity, Lack of Bone Stimulation
During the school year, kids get exercise through PE classes and school activities, but summer often sees them glued to games or shows, increasing sedentary time. Without weight-bearing activities like jumping or running, growth plates in bones lack stimulation, slowing growth. Experts suggest moderate-intensity exercise promotes growth hormone secretion, but many kids cut their activity levels by 50% during summer, directly impacting height.
3. Unbalanced Diets, Too Many Sugary Snacks
Summer break often means more sugary drinks and snacks, with kids neglecting essential nutrients like protein and calcium. This not only leads to weight gain but also suppresses growth hormones and reduces bone density. Research shows that children with unbalanced diets grow only 70% as much in height during summer compared to the school year. Excessive snacking fuels “horizontal growth” rather than “vertical growth.”
4. Hidden Stress and Lack of Sunlight
While summer break seems carefree, a lack of peer interaction or parental company can create hidden stress, disrupting the endocrine system and growth hormone production. Additionally, staying indoors in air-conditioned rooms reduces sunlight exposure, leading to vitamin D deficiency, which impairs calcium absorption and bone development. These factors make summer a “silent growth killer.”
Tenchi GrowthMax Chews: Scientifically Boosting Growth
To break through the growth bottleneck during summer vacation, scientifically formulated nutritional supplements are a great ally. Tenchi GrowthMax Chews, developed by a century-old Japanese pharmaceutical company, is a sugar-free nutritional supplement designed for children and adolescents aged 5 to 22. It contains three highly absorbable calcium sources (eggshell calcium, seashell calcium, coral calcium), nine growth-promoting amino acids (such as lysine, threonine, and arginine), whey protein, and a vitamin blend, effectively supplementing nutrients that are hard to obtain from daily diets. According to three large-scale clinical trials in Japan, after three months of continuous use, 92% of participants experienced an average height increase of 34%, demonstrating its ability to effectively stimulate growth hormone secretion and delay growth plate closure. Taking two tablets daily, combined with the aforementioned exercise, provides comprehensive support for the growth period.
Key Ingredients and Benefits
- 9 Essential Growth Amino Acids (including lysine, threonine, arginine, etc.): These amino acids are vital for bone growth and development. They stimulate the secretion of growth hormones and promote the proliferation of bone cells.
- Patented YGF Yeast Peptide®: Derived from natural yeast, it's rich in unique small-molecule bioactive peptides that effectively enhance nutrient absorption, activate growth factors, and support the development of bones and cartilage.
- Oyster Extract: Contains abundant zinc, taurine, calcium, and various trace elements. It promotes metabolism and helps enhance bone density and support cellular repair.
- 3 Types of Growth Calcium (Eggshell Calcium, Seashell Calcium, Seaweed Calcium): Provide highly absorbable calcium to strengthen bone structure.
- Whey Protein: A high-quality protein source that works synergistically with amino acids to activate growth factors and accelerate the development of cartilage in the growth plates.
- Premium Shark Cartilage Extract: Promotes cartilage tissue regeneration and supports bone cell growth.
- Pig Cartilage Extract: Helps maintain bone health and supports the strength and durability of the overall skeletal structure.
- Vitamin Premix: Includes bone-growth-promoting vitamins D and K, along with essential B vitamins and folic acid, providing comprehensive support for healthy bone and body development in adolescents.
Scientific Benefits
- Stimulates Growth Hormone Secretion: Promotes pituitary GH release to accelerate bone cell growth.
- Delays Growth Plate Closure: Extends the growth window for adolescents, helping overcome genetic height limitations.
- Comprehensive Nutritional Support: Provides key nutrients often lacking in daily diets to support bone health.
Frequently Asked Questions
🔍What age group is best suited for this product? It’s ideal for ages 5–22, with the best results seen before puberty (boys 12–16, girls 11–15), when growth plates are still open.
Recommended Dosage:
5-15 years: Once daily, two tablets each time
16 years and above: Twice daily, two tablets each time
🔍Can Taking Height Growth Products After Age 18 Still Promote Height Increase? Yes, taking height growth candy after age 18 can still promote height increase! Although most people's growth plates gradually close after puberty, studies show that some individuals may still have open growth plates before age 22, retaining growth potential. Clinical trials of the height growth candy indicate cases of height increase in participants under 22 years old after use.
Summer vacation is supposed to be a golden period for children’s height growth, but it can become a “growth bottleneck” due to poor habits. Parents can help their children get back on track by adjusting sleep schedules, increasing physical activity, and ensuring a balanced diet. Combined with the scientifically formulated Tenchi GrowthMax Chews, children can even surpass genetic limitations and grow taller with ease. Growth only happens once—act now! If you have any concerns, consult a professional physician to ensure it suits your child’s needs.
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Tenchi GrowthMax Chews
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