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Functional Fueling Nutrition

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Functional Fueling Nutrition

Functional Nutrition Solutions for Thyroid and Hormone Imbalances.

We are a team of registered dietitian nutritionists that specialize in personalized, evidence-based nutrition solutions for hypothyroidism, hashimotos, PCOS, and other hormonal imbalances. Functional Fueling Nutrition is a Los Angeles and virtual based nutrition practice specializing in functional medicine and hormones. Our Registered Dietitian, Lauren, helps women ages 25-55 restore hormone imbalances using advanced lab testing and functional nutrition to get to the root cause and achieve optimal healing.

02/20/2026

The lymphatic system is one of the most overlooked pieces of thyroid healing with Hashimoto’s especially

It’s such a key piece to immune regulation and resolving inflammation.

When not properly supported, it can make resolving inflammation and improving thyroid function much more challenging.

In this week’s blog we unpack all the lymphatic system does, signs yours might need support and some places to start with supporting it.

Comment “lymphFFN” and I’ll send you a link to learn more

02/04/2026

Overtraining syndrome isn’t just something elite athletes deal with- it affects highly active people too.

Especially if you’re pushing your body to the limit in other areas outside exercise like work, stress, under-fueling, detox, etc.

Exercise is a good stressor until your body can’t adequately recover from that stressor and it starts breaking you down. Your hormones are one of the first places to take the hit.

Comment “132” and I’ll send you the link to listen to this weeks podcast where I break down how overtraining affects the body, why it’s about so much more than just training volume and intensity, and where to start if you suspect you may be experiencing this

02/02/2026

Long COVID symptoms aren’t something you have to just “wait out.”

This case study is a reminder that post-viral illness has root physiological drivers — and when those are addressed, energy and health can be restored.

This client came to us 2 years post-COVID, post-menopausal, with:
• Crushing fatigue
• Exercise intolerance
• Chronic pain
• Swelling and weight gain
• A body that felt constantly inflamed

After being told there was no clear treatment path, she knew there had to be a better way.

Her labs revealed a pattern we see often with Long COVID:
• An overburdened immune system
• Ongoing inflammatory signaling
• Metabolic and vascular stress
• A nervous system stuck in fight-or-flight
• Cells struggling to access and use energy

By addressing the root drivers — immune dysregulation (what we often call energy leaks), gut inflammation, metabolic resistance, nervous system dysregulation, and nutrient depletion — her body finally had the support it needed to recover.

✨ Energy returned
✨ Inflammation quieted
✨ Exercise tolerance restored
✨ Weight normalized
✨ The nervous system downshifted

This is what root cause, lab-guided care looks like.

If this case study sounds like you — or someone you love — there is a path forward.

👉 DM “READY” if this resonates, and I’ll share next steps for working together.

1:1 care for complex fatigue, inflammation, and post-viral illness.

01/29/2026

Your low testosterone levels aren’t random and they impact ovulation, progesterone production & even your immune system more than you might think

Testosterone is one of the androgens made predominately by the theca cells in the ovaries. It’s dependent on luteinizing hormone (LH). When LH surges mid-cycle so does testosterone.

So when the LH surge isn’t occurring or is weak, testosterone production follows suit.

Testosterone is an essential hormone for many functions for women, and one of the major ways low levels show up is through impaired follicle maturation.

For the immune system, testosterone can help with viral clearance, a key issue affecting autoimmunity and other immune dysregulation type issues.

In this weeks podcast episode I uncover all the benefits of testosterone (and androgenic hormones) for women, the causes of both low and high testosterone as well as adrenal androgens like DHEA and DHEA-S.

Comment “131” and I’ll send you the link to listen!

01/27/2026

Here’s the thing: you need energy to detox!

So if you’re in a mold, gut, or detox protocol and suddenly feeling more inflamed, more puffy, more tired, or noticing shifts in your thyroid labs….thats feedback from your body.

It’s common to think that these types of detox will feel instantly “cleansing.”
But for many, it actually triggers a rise in acute inflammation first. And that can feel really defeating when you’re doing everything you can to feel better.

Some level of symptom change can be normal and expected.
But when those symptoms reflect acute inflammation, it’s often a sign the system has been pushed beyond what it can currently handle.

Detox requires:
• Mineral reserves
• Mitochondrial energy
• Adequate T3

If those aren’t strong enough yet, inflammation rises as a protective response.

This is why healing is all about timing.
Knowing which systems to push, which ones to support first, and how to respond when your body reacts differently than expected.

Healing works best when your physiology is resourced enough to process what you’re asking it to do.

Comment “detox inflammation” and I’ll send you our blog to learn more.

01/24/2026

Not all foods are neutral when thyroid capacity is low.

Some foods require support systems to be working well first. When those systems are underpowered, the food becomes the stressor on thyroid hormone production.

Oxalates need sulfur and glutathione.
Without it, they pull resources from sulfation- a key process for hormone detoxification and deplete key minerals like iron and zinc needed for thyroid hormone production.

Goitrogens like what are found in broccoli, cabbage, kale, etc. require iodine sufficiency.
Without it, there aren’t adequate resources to make thyroid hormones.

Aflatoxins from plants like peanuts require strong antioxidant capacity.
Without it, oxidative stress increases, placing strain on the thyroid and mitochondria.

Endocrine disruptors like what are found in plastics require strong bile flow.
Bile flow is naturally reduced in situations of low thyroid function and is critical for t4 to t3 conversion as well as detoxification.

None of these foods are inherently bad.
But most people with low thyroid function don’t have these buffering systems fully online yet.

And without them, thyroid production and utilization becomes impacted.

This is why thyroid restoration isn’t just about what you do or don’t eat. It’s about restoring these systems and using food as a methodical tool to do so.

I teach you where to start to restore these systems inside my course, Functional Thyroid Foundations! Comment “course” and I’ll send you a link to learn more

01/16/2026

T3 is the thyroid hormone MVP 🌡️

It sets the pace of nearly all speed processes in the body.

Both Low free T3 levels and normal T3 but low T3 symptoms are patterns we commonly see.

That’s because testing has limits.
Free T3 isn’t always run. Reverse T3 (the hormone that blocks it) is rarely checked. And if you’re already on thyroid medication, those numbers can look “better” on paper while you’re still very symptomatic.

✨You can add more thyroid hormone, but if something is blocking them from working, it won’t fix the problem.✨
It’s like putting on a jacket because you’re cold… while leaving all the doors and windows open.

This is where root cause work matters.
We look at why T3 is low in the first place, or why it’s not getting into the cells and receptors where it needs to act—like the brain, gut, ovaries, and mitochondria.

Because T3 doesn’t just need to be present.
It needs to be usable.

Comment “t3 guide” and I’ll send you a link to our complete root cause guide of what causes low T3 in active women and where to start!

01/14/2026

Follicular phase >23 days or delayed ovulation? Here’s a main contributor

The main goal of the follicular phase is to grow and select an egg that is energetically strong enough for conception.

Because of this, if the brain senses there is inadequate energy on board, this process doesn’t carry out as efficiently as it should.

The immune system is a major player in this process as it uses up a substantial amount of energy.

In this week’s podcast episode I break down how the immune system impacts ovulation, why energy leaks in the immune system cause long follicular phases and irregular cycles and how this all ties back to the thyroid hormone T3.

Comment “129” and I’ll send you a link to listen

01/09/2026

Beyond honored and grateful to be nominated Best Hormone-Focused Nutrition Practice in California for 2025 by Global Health & Pharma Magazine 🥳

Grateful for my entire team—from our clinicians working directly with patients to the behind-the-scenes support that keeps everything running smoothly and aligned with our mission every single day.

2026, we’re off to a good start. Let’s keep this thing rolling and help more active women who need us!

01/08/2026

Meet the Functional Fueling clinical team 🤎

When you work with us at Functional Fueling Nutrition, you’re supported by a dedicated clinician selected based on your unique health picture—while I remain actively involved in every case, guiding strategy, reviewing labs and your progress, and designing your treatment plan. This ensures your care stays intentional, consistent, and deeply personalized from start to finish.

Our approach is different by design.
We don’t chase symptoms or “balance hormones”—we restore systems.

That means identifying why the body is adapting the way it is, rather than cycling through protocols without clarity. Our work is grounded in root-cause analysis and systems-based care that considers how your unique physiology, stress, movement, nutrition, and lifestyle all interact.

Care here is thoughtful and science-backed, yet built around your real life—not an idealized routine that’s impossible to sustain. We intentionally work with a small number of clients at a time to preserve depth, continuity, and efficacy.

You can learn more about our practice and applying to become a patient at
functionalfueling.com/coaching-page

01/07/2026

DHA is not the only omega-3 you need during pregnancy and this matters most than people realize!

While DHA is critical for fetal brain and nervous system development, EPA is what helps transport DHA across the placenta. They function as a team, not in isolation.

Yes, your baby can pull from your stores—but that does not mean adequacy. Both and I agree that we have yet to see patients consistently meet omega-3 needs through diet alone. Omega-3 fatty acids are essential nutrients, meaning your body cannot make them. If intake is insufficient, deficiency develops.

From a pre-conception standpoint, omega-3s are foundational. They are required to produce prostaglandins—hormone-like signaling molecules that support:
• Ovulation
• Implantation
• PMS symptom regulation

In this week’s podcast episode, we break down:
• DHA vs EPA and why ratios matter
• Why “just taking DHA” often falls short
• Other nutrients that work synergistically with omega-3s pre-conception, during pregnancy and postpartum

Comment “128” and I’ll send you a link to the episode

Address

San Diego, CA

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Telephone

+16193792416

Website

http://functionalfueling.com/

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Our Story

Functional Fueling Nutrition is a nutrition private practice owned by Lauren Papanos, MS, RD, CSSD. Lauren specializes in a root-cause, personalized approach to nutrition. Lauren is a Registered Dietitian Nutritionist, a board certified Specialist in Sports Dietetics and is trained in functional nutrition. She holds both her bachelor’s and master’s degrees in Nutritional Sciences. She has worked as a Division I Power 5 Performance Dietitian as well as in outpatient functional medicine clinics. She has been featured on websites like Women’sHealthMag.com, Active.com, Insider.com and published research in several medical journals.

Her specialties include:

thyroid and metabolism

women’s hormones