A study just found weird evidence that a stressful childhood affects you forever.

We know your relationship with your parents can affect a lot about who you are as you grow up. But is it possible that the good and bad of that relationship could actually show up in your saliva?

That's the bizarre-but-important question a team of researchers recently asked, the results of which were published in Developmental Science.

Led by Elizabeth Shirtcliff, an associate professor from Iowa State University who studies early childhood adversity, the study gathered 300 8th-grade kids and used a simple survey to determine some basic facts about their parents. The kids were asked things like whether they were close with their parents and how often positive reinforcement was used in their household.


The team was looking for signs of what they called "positive parenting, attachment, and bonding."

Six years later, the kids — now adults — were brought back in for a strange follow-up. The researchers collected a dozen different samples of their saliva.

It sounds a little gross, but they were looking for something important: the presence of a hormone called cortisol. Cortisol is crucial to our overall well-being. Lower levels of cortisol are correlated with fatigue, mood swings, and muscle loss, for example. Higher levels of cortisol correlate with healthy blood pressure levels and better immune system function (though extremely high levels are a health risk).

For this study, cortisol was particularly important because it plays a big role in how we process and react to stress. When we're faced with extreme stress or danger, cortisol floods our bodies, resulting in the "fight or flight," response.

The study's authors observed that people who are generally more stressed over longer periods of time, however, often show lower cortisol levels — almost like they get accustomed to all that stress over time and have a lesser reaction to it. While this might sound like a good thing, as far as your health goes, it's definitely not.

The results of the study were clear: The more signs the kids showed of a positive bond with their parents when they were young, the better their cortisol functioned in adulthood.

The more signs of positive parenting, attachment, and bonding that were present in childhood, the better the cortisol functioning turns out to be in adulthood. Image from "Visual Abstract 12.19" by Ben Shirtcliff/YouTube.

That's a good thing, the researchers suggest, because it helps keep kids alert and sensitive to all of the stimuli and information swirling around them from day to day, rather than having a blunted response to stressors and life in general.

So having great parents who use positive parenting methods is a good thing. Yay!

But the study had an important twist when it came to looking at racial demographics.

When race differences were accounted for — about half the kids were black and half were white — the cortisol correlation didn't hold up.

On average, the study found, white and black parents were equally likely to have a positive bond with their kids. But parenting styles aren't the only thing that can affect stress levels and kids' response to it.

Many of the white students in the study may have benefited from "low stress, resource-rich contexts which unfortunately may be less common for black youth," the researchers explained.

It's also worth noting that many groups — including black people of people Jewish descent — carry biological markers of trauma from previous generations (i.e., slavery, the Holocaust), which can also affect cortisol response.

Image via visual abstract by Ben Shirtcliff/YouTube

In other words, growing up with various socioeconomic and other hardships does indeed have a lifelong impact, and now we've got the beakers full of saliva (so to speak) to prove it.

This is important work. It proves that, in many cases, being a great parent can actually physically manifest itself in kids growing up to be well-adjusted and adaptable.

Being a loving parent can actually have a biological impact on your kids years and years later. That's amazing!

Perhaps most importantly, however, it shows a glaring need for kids — particularly those belonging to marginalized or disadvantaged groups — to get better support in the form of solid education, safe communities to grow up in, and more opportunities to learn and grow.

Having great parents isn't always enough to overcome a world that seems to be stacked against you, but it certainly helps.

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Shopping sustainably is increasingly important given the severity of the climate crisis, but sometimes it's hard to know where to turn. Thankfully, Amazon is making it a little easier to browse thousands of products that have one or more of 19 sustainability certifications that help preserve the natural world.

The online retailer recently announced Climate Pledge Friendly, a program to make it easier for customers to discover and shop for more sustainable products. To determine the sustainability of a product, the program partnered with third-party certifications, including governmental agencies, nonprofits, and independent labs.

With a selection of items spanning grocery, household, fashion, beauty, and personal electronics, you'll be able to shop more sustainably not just for the holiday season, but throughout the year for your essentials, as well.

You can browse all of the Climate Pledge Friendly products here, labeled with an icon and which certification(s) they meet. To get you on your way to shopping more sustainably, we've rounded up eight of our favorite Climate Pledge Friendly-products that will make great gifts all year long.

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Jack Wolfskin Women's North York Coat

Give the gift of warmth and style with this coat, available in a variety of colors. Sustainability is built into all Jack Wolfskin products and each item comes with a code that lets you trace back to its origins and understand how it was made.

Bluesign: Bluesign products are responsibly manufactured by using safer chemicals and fewer resources, including less energy, in production.


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Amazon All-new Echo Dot (4th Gen)

For the tech-obsessed. This Alexa smart speaker, which comes in a sleek, compact design, lets you voice control your entertainment and your smart home as well as connect with others.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.


Amazon

Burt's Bees Family Jammies Matching Holiday Organic Cotton Pajamas

Get into the holiday spirit with these fun matching PJs for the whole family. Perfect for pictures that even Fido can get in on.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

Naturistick 5-Pack Lip Balm Gift Set

With 100% natural ingredients that are gentle on ultra-sensitive lips, this gift is a great gift for the whole family.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.


Amazon

Arus Women's GOTS Certified Organic Cotton Hooded Full Length Turkish Bathrobe

For those who love to lounge around, this full-length organic cotton bathrobe is the way to go. Available in five different colors, it has comfortable cuffed sleeves, a hood, pockets, and adjustable belt.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

L'Occitane Extra-Gentle Vegetable Based Soap

This luxe soap, made with moisturizing shea butter and scented with verbena, is perfect for the self-care obsessed.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.

Amazon

Goodthreads Men's Sweater-Knit Fleece Long-Sleeve Bomber

For the fashionable men in your life, this fashion-forward knit bomber is an excellent choice. The sweater material keeps it cozy and warm, while the bomber jacket-cut, zip front, and rib-trim neck make it look elevated.

Recycled Claim Standard 100: Products with this certification use materials made from at least 95% recycled content.

Amazon

All-new Fire TV Stick with Alexa Voice Remote

Make it even easier to access your favorite movies and shows this holiday season. The new Fire TV Stick lets you use your voice to search across apps. Plus it controls the power and volume on your TV, so you'll never need to leave the couch! Except for snacks.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.

In the hours before he was sworn in as the 46th president of the United States, then-President-elect Biden was sent a letter signed by 17 freshmen GOP members of the House of Representatives.

In sharp contrast to the 121 Republican House members who voted against the certification of Biden's electoral votes—a constitutional procedure merely check-marking the state certifications that had already taken place—this letter expresses a desire to "rise above the partisan fray" and work together with Biden as he takes over the presidency.

The letter reads:

Dear President-elect Biden,

Congratulations on the beginning of your administration and presidency. As members of this freshman class, we trust that the next four years will present your administration and the 117thCongress with numerous challenges and successes, and we are hopeful that – despite our ideological differences – we may work together on behalf of the American people we are each so fortunate to serve.

After two impeachments, lengthy inter-branch investigations, and, most recently, the horrific attack on our nation's capital, it is clear that the partisan divide between Democrats and Republicans does not serve a single American.

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If the past year has taught us nothing else, it's that sending love out into the world through selfless acts of kindness can have a positive ripple effect on people and communities. People all over the United States seemed to have gotten the message — 71% of those surveyed by the World Giving Index helped a stranger in need in 2020. A nonprofit survey found 90% helped others by running errands, calling, texting and sending care packages. Many people needed a boost last year in one way or another and obliging good neighbors heeded the call over and over again — and continue to make a positive impact through their actions in this new year.

Upworthy and P&G Good Everyday wanted to help keep kindness going strong, so they partnered up to create the Lead with Love Fund. The fund awards do-gooders in communities around the country with grants to help them continue on with their unique missions. Hundreds of nominations came pouring in and five winners were selected based on three criteria: the impact of action, uniqueness, and "Upworthy-ness" of their story.

Here's a look at the five winners:

Edith Ornelas, co-creator of Mariposas Collective in Memphis, Tenn.

Edith Ornelas has a deep-rooted connection to the asylum-seeking immigrant families she brings food and supplies to families in Memphis, Tenn. She was born in Jalisco, Mexico, and immigrated to the United States when she was 7 years old with her parents and sister. Edith grew up in Chicago, then moved to Memphis in 2016, where she quickly realized how few community programs existed for immigrants. Two years later, she helped create Mariposas Collective, which initially aimed to help families who had just been released from detention centers and were seeking asylum. The collective started out small but has since grown to approximately 400 volunteers.