Happy Children's Health Study

Make a Difference for All Our Children


The Happy Children's Health Study (HCHS) is a landmark nationwide children's study—the first scientific project of its kind to study and unravel the early maternal and early childhood predictors of healthy childhood development, and early risk factors and causes of disease (such as allergy, asthma, autism, diabetes, obesity).

Parents like you are the key to making the HCHS possible. Together, parents and children can unravel mysteries of childhood diseases by banding together and pooling our data to find the answers. We will be joined by scientists from universities around the world, including from Harvard, collaborating together to make even more discoveries.

Who is behind it?

Founded by award-winning Harvard scientists from the Harvard Chan School of Public Health, the HCHS is supported by private funders, proceeds from Happy Vitals, contributions from the public, and volunteer participants.

The Principal Investigators of HCHS, Dr. Eric Feigl-Ding and Dr. Andrea Feigl-Ding, are trained in medical epidemiology, nutrition, biostatistics, global health, and population reproductive health – and together have had over 25 years of experience in public health, directed projects with over $10 million in research funding, and published over 100 papers included in leading medical journals.



Dr. Eric Feigl-Ding

Dr. Eric Feigl-Ding

Dr. Andrea Feigl-Ding

Dr. Andrea Feigl-Ding

Why should I join?

Be part of history and help make medical breakthroughs!

In spite of the tremendous need, there has never been a nationwide children's health study to date in North America. Make history and leave your mark on future generations by joining the HCHS. Together, we will uncover prenatal and early risk factors for asthma, allergies, autism and other conditions affecting our children.

How do I participate?

The Happy Children's Health Study is currently collecting participation interest via our site, and will be soon contacting individuals among those who complete the interest form or purchase a HV kit. The HCHS will be accepting breast feeding mothers, pregnant mothers, and infant/toddlers (age <2) of the mothers who have participated in Happy Vitals testing. We anticipate expanding our eligibility criteria as funding increases other additional mothers, fathers, and older children.

Participants who later choose to enroll still share and update their health information via our digital platform. All data will be kept strictly confidential. Please indicate your interest in participation by first completing this form.


Get started with a Happy Vitals package!



Purchase of Happy Vitals test does not automatically enroll you into the HCHS. Individuals will have an opportunity to formally join the study at a later date.

How else can I help?

You can invite other friends, and you can support the study with a tax-deductible contribution to the Happy Children Foundation. Supporters will be honored as founding sponsors of the study, and acknowledged on official registries, and reports of discoveries arising from the HCHS.


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Get Involved!


Fill out the HCHS interest form and subscribe to newsletter. Complete our questionnaire to help us customize articles and information to your interests and concerns.



In the Forum join people like you tell their stories, share information, and discuss everything you need to know about children's health.

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