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A person shopping in a grocery store adds a bottle of oil to their shopping bag.
In the news

Updated on Oct. 1, 2025

9 minute read

What Are Seed Oils, and Are They Bad For You?

Emily Oster, PhD

Four tablespoons of various kinds of salt are pictured on a marble background.

Oct. 25, 2023

2 minute read

How Much Sodium Do I Need?

Emily Oster, PhD

An over the shoulder shot of a parent breastfeeding a baby.

Oct. 25, 2023

4 minute read

Does Breastfeeding Increase the Risk of Colorectal Cancer?

Emily Oster, PhD

A pregnant person and spouse kiss in bed.

Oct. 25, 2023

3 minute read

Do I Really Need Pelvic Rest With a Placenta Previa?

Emily Oster, PhD

A kid in a skeleton costume holding a pumpkin-shaped bowl of candy.

Oct. 25, 2023

3 minute read

What's the Data on Halloween Candy?

Emily Oster, PhD

Yellow and pink menstrual pads are arranged in a checkerboard pattern.

Updated on Feb. 27, 2025

8 minute read

Better Know Your Menstrual Products

Emily Oster, PhD

ParentData podcast cover art

Oct. 19, 2023

18 minute read

Parenting Through Divorce

Emily Oster, PhD

Kitchen sponge and rags

Updated on Dec. 31, 2024

3 minute read

How Worried Should I Be About Bacteria on Kitchen Sponges?

Emily Oster, PhD

A mom breastfeeding her baby

Updated on Apr. 28, 2025

2 minute read

How Much COVID Protection Will My Baby Get from Breastfeeding?

Emily Oster, PhD

A baby cries on their parent's shoulder during daycare drop-off.

Updated on Sep. 3, 2025

4 minute read

What Should I Do About Unbearable Day Care Drop-Offs?

Emily Oster, PhD

A fancy pink decorated egg illustrates the concept of "high-quality eggs" for fertility.

Updated on Oct. 31, 2025

3 minute read

Is It Possible to Improve My Egg Quality?

Breonna Slocum, MD

An infant at a daycare smiles while playing with other babies and toys.

Updated on Sep. 11, 2025

11 minute read

How Does Day Care Impact Children?

Emily Oster, PhD

Round citrus fruit arranged to look like breasts.

Oct. 12, 2023

9 minute read

An Owner’s Manual for Breasts

Gillian Goddard, MD

Two children pretend to give anesthesia to their teddy bear before surgery.

Updated on Dec. 12, 2024

2 minute read

Should I Get a General Anesthetic for My C-Section?

Emily Oster, PhD

A small child smiles and holds up bubble-covered hands while washing their hands.

Updated on Oct. 14, 2025

3 minute read

How Often Should I Make My Kids Wash Their Hands?

Emily Oster, PhD

A baby pulls themself up to stand at a bench.

Updated on Oct. 22, 2025

2 minute read

Should I Worry if My Baby Isn't Walking?

Emily Oster, PhD