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Sarah Kleiner Wellness

Reverse weight loss resistance (Leptin Resistance), alleviate insomnia, and support hormone and mitochondrial health with Circadian Biology, Quantum Biology and Nutrition. Discover how ancestral wisdom, combined with modern tips, can revolutionize your health without the need for expensive tests, supplements, or unattainable protocols! Board Certified by the American Naturopathic Medical Association.

My biggest contest of the year

$7,000 in prizes - If you thought my last contest was good - this one is even better! Contest: because the last one was so fun....Now through January 1st! I want to do everything I can to help you start off 2026 on the right foot! Not only do I have an amazing contest with over $7,000 in prizes - I am also offering a free webinar on January 4th to help you understand nutrition in the new year - Building Your Perfect Quantum Plate - (click here for all the details & to register) I will also be...

I was wrong about sunlight through closed windows

Why it's not 100% useless - and what this means for indoor workers. I used to say that sunlight through a window “doesn’t really count".... And for a long time, that was a useful simplification, but a brand new human study made me pause, and then completely rethink how I talk about daylight, windows, blood sugar, and metabolism. Keep reading to learn more about the study & what it means for indoor workers ⚡️ Last minute gift idea - Click here for my holiday sale any of these items can be...

Solstice Blessings & Mastering Winter Sleep

Last day to enter my THANK YOU contest & a few of my favorite winter solstice quotes. Today is the winter solstice - the longest night of the year (in the Northern Hemisphere) Humans have marked this day for thousands of years, not because things were “manifesting,” but because they understood something we’ve largely forgotten: Darkness is not a problem to solve - it’s a phase that allows repair. So today I want to share a few of my favorite Winter Solstice quotes, my in depth article on...

Last minute ideas & Contest!

Win $200 to spend at VivaRays - a vibration plate - a walking pad & lifetime access to MyCircadianApp this weekend! Contest: I want to thank you! Quick note today as I know you are likely busy as we prepare for the holiday! Today I will list out a few things that can still ship in time for Christmas (for most people) - and as a major thank you for being here this year - I want to do a giveaway! Two winners will get: $200 to spend at VivaRays - a brand new Walking Pad , a Vibration Plate &...

8 New- Low Risk tools I've added this winter

This winter I’ve had more stress - more demands & had to learn some new skills. These 8 things have made a massive difference! My 8 easy winter changes that don't require a life-overhaul Every season asks something different of us, and gives us an opportunity to observe ourselves & adapt to change (or not 🫣). However - this winter, more than any in recent memory, made it very clear that I couldn’t keep running the same “winter protocol” I’ve used in the past. Not because it stopped working,...

The Best Time of Day for Sauna, Red Light, Vibration Plate

Circadian-Aligned Therapy: Why Timing Matters As Much As the Tool (Without Making Perfect the Enemy of Good) Why “Good Therapies” Sometimes Feel Inconsistent Modern wellness is very focused on what to do: Red light Cold therapy Vibration plates Sauna Hydrogen Exercise And here's something important to understand: Many of these tools work even when timing isn’t ideal , and people absolutely still see benefits. However - your biology doesn’t operate in a vacuum, and every single cell and organ...

Can vitamin D supplements lower your natural melatonin?

Human study says YES....What you need to know this winter & more on the dark side of Vitamin D. Are you unknowingly tanking your natural melatonin? In Tuesday's email, I walked you through why winter always brings a drop in vitamin D.......and how modern life pushes melatonin down with it. (If you missed it, you can read that email here.) Today, I want to zoom in on one piece almost nobody in the functional or allopathic world talks about enough: Can vitamin D supplements actually lower your...

Winter Isn’t the Problem - Entering It Unprepared Is

Inside: Melatonin Ebook (no charge) & WHAT to do if you have entered winter with low reserves and you are already crashing.... Have you hit a winter slump? It’s been unseasonably cold, rainy, cloudy, and dark here in Georgia… and after a week at home with a sick toddler (including two all-nighters), my morning and evening routines have been greatly disturbed 😅. How I’ve felt these last few days (not so awesome) reminded me why winter gets blamed for everything - the sluggishness, mood dips,...

Can you birth month predict your strength?

Babies born in November are up to 10% stronger than babies born in June & the reason is quite interesting... This sunlight data shocked me… I hope you are having a fantastic Sunday.....I came across this research last week & thought it would be fun to discuss in an article today. The research on birth month and fetal development tells a very interesting story, and it's that babies born in late fall (September–November) consistently demonstrate: higher bone mineral density stronger grip...

Separating marketing claims from real data

The science behind the hype: Vibration plates - red light - hydrogen - castor oil - circadian routines & more Winter scams? It seems like everywhere you look - there is someone calling something a "scam".....and the truth is that many companies DO inflate studies for marketing (which can be a bit predatory in my opinion). It's also very popular online to be a "contrarian" - which ends up making people even more confused at the end of the day. So again - my commitment to you as the reader is...