Why I Became Rapidly Exhausted After 50 (Do This 10-Second Neck Test)

I was too tired to visit friends. Too exhausted for family dinners. Even grocery shopping felt overwhelming. Then I discovered why – and everything began to shift.

Written by: Liz Hart on 15/05/2025

Senior Editor | Wellness Expert

Why I Became Rapidly Exhausted After 50 (Do This 10-Second Neck Test)

Three years ago, my daughter called to invite me to my granddaughter's school play.

"I can't make it," I heard myself saying. Again.

The truth? It was at 7 PM, and I knew I'd be too exhausted to drive by then.

I'd probably be in bed, not sleeping, just lying there because even watching TV felt like too much effort.

After I hung up, I sat at my kitchen table and cried.

Not just because I was missing another moment with my granddaughter, but because I'd become someone I didn't recognize.

Someone who was always too tired.

The Test That Opened My Eyes

If you're reading this and nodding your head, I need you to do something right now.

Place two fingers on your neck, just below your chin. Feel that soft area? That's your thyroid gland.

Now, while touching it, ask yourself:

  • Are you tired even after sleeping 8-9 hours?
  • Do you avoid making plans because you might be "too tired"?
  • Has your social life shrunk because you have no energy?
  • Do people comment that you look tired or unwell?
  • Is getting through a normal day a struggle?

If you said yes to any of these, that little gland under your fingers might be the thief stealing your energy. Just like it stole mine.

When Life Started Slipping Away

Always feeling the need to grab a cup of coffee because I always felt so tired

I remember the exact moment I realized something was seriously wrong.

My husband wanted to visit our son – just a three-hour drive.

The thought of sitting in a car for that long made me want to cry.

Not just because I was tired, but because my hips would ache after just 30 minutes of sitting.

I told him to go without me.

The look on his face broke my heart. Not anger, not frustration. Just... resignation.

Like he'd gotten used to doing things alone.

That's when it hit me.

This wasn't just "getting older."

My friend Linda was my age and she was traveling to Europe.

My sister was taking dance lessons.

But I couldn't even make it through a trip to the grocery store without needing a nap, and simple tasks left me with aching joints.

The Doctor Visits That Led Nowhere

Like many, I started with my doctor. Then sought second and third opinions.

Each time, I heard something like:

"Your blood work looks fine."

"Maybe try getting more sleep." (I was already sleeping 10 hours a night)

"Have you tried B-12 shots?" (I had—but they didn’t seem to help me.)

"Perhaps you're depressed?" (No, I was exhausted)

One doctor kindly suggested light exercise. But at the time, even walking to the mailbox felt like a challenge.

The Discovery That Explained Everything

It wasn't until I stumbled across research about thyroid function after 50 that everything clicked.

Here's what I learned: After 50, your thyroid still makes hormones, but in a form your body can't use.

It's like having a car full of gas but no key to start it.

Your thyroid makes something called T4 (inactive hormone).

For energy, it must convert to T3 (active hormone).

After 50, this conversion system breaks down.

Without T3, your cells literally cannot make energy.

You could sleep all day and still be exhausted. Just like I was.

Why Nobody Talks About This

The medical system, most doctors begin by prescribing synthetic thyroid hormones—an approach that helps many, but not all.

What’s less frequently discussed is that these medications primarily provide T4—the inactive form of the hormone—which still needs to be converted to T3, the active form your body can use.

For some people, especially as they age, this conversion process may become less efficient.

I watched my sister go down this path.

Started on thyroid medication.

Dose adjusted several times.

Still exhausted. Still missing out on life.

Her labs said things were “normal,” but her energy and quality of life told a different story.

The Missing Piece I Almost Missed

Late one night, unable to sleep despite being exhausted (the cruel irony), I found research that changed my life.

Scientists discovered that T4 to T3 conversion requires specific amino acids.

But here's the kicker – after 50, your body loses the ability to extract these amino acids from food properly.

This means even if you eat perfectly, your thyroid may not be getting what it needs to support healthy energy levels.

I remember reading this and touching my neck, right where you're touching yours now.

This little gland had been crying out for help, and I hadn't known how to help it.

The Turning Point I Didn’t See Coming

I'll never forget the morning I woke up and felt... different.

Not miraculous, not like I was 30 again. Just... not exhausted.

It had been about six weeks since I started giving my body the amino acids it needed to support healthy thyroid function—especially the conversion from T4 to T3. Little by little, things began to shift.

That morning, I made breakfast. Real breakfast, not just coffee.

I showered and got dressed in real clothes, not pajamas.

And when my daughter called to invite me to lunch, I said yes.

She was so surprised she asked if I was feeling okay. That's when I realized how long it had been since I'd said yes to anything.

Getting My Life Back

The changes came gradually but steadily:

  • Week 3: I stopped needing afternoon naps
  • Week 6: I went grocery shopping without exhaustion
  • Week 8: I drove to see my son (yes, the same trip I couldn't make before)
  • Week 12: I was cooking family meals again

My husband told me later that he'd started crying the day I suggested we take a weekend trip.

He thought he'd lost his wife to exhaustion. He wasn't wrong.

The Science Behind My Recovery

What saved me was understanding that my thyroid needed eight specific amino acids in exact ratios to function properly.

Not just any protein – most of us over 50 can't digest regular protein well enough to extract what we need.

I needed amino acids that were:

  • Already broken down (no digestion required)
  • In the exact ratio for thyroid function
  • Pure enough to actually work

This is why I was exhausted despite eating well.

My body may have had difficulty extracting enough from food alone.

Why I'm Sharing This

Last month, I was at my granddaughter's dance recital.

Not just attending – I was the volunteer helping with costumes backstage.

As I was fixing her tutu, she hugged me and said, "I'm so glad you're not tired anymore, Grandma."

I had to bite my lip to keep from crying.

I'm sharing my story because I know you're out there. Lying on your couch. Turning down invitations. Watching life pass by through exhausted eyes. Feeling guilty but too tired to change it.

Your thyroid is crying out for help, just like mine was.

The Smart Protein Solution

When I discovered which amino acids I needed, I thought the solution would be simple. Just eat more protein, right? Wrong.

I spent hours researching and discovered it's virtually impossible to get these specific amino acids in the right amounts from food.

Even if you ate steak three times a day, your 50+ digestive system can't extract what your thyroid needs.

So I started pricing individual amino acid supplements. L-Methionine here, L-Lysine there, L-Phenylalanine from another company... The cost was astronomical, and I'd need to take 15+ pills a day to get the right amounts.

That's when I discovered something called the Master Amino Pattern (MAP).

https://pubmed.ncbi.nlm.nih.gov/14964348/

And even better, I found a company that had packaged all eight essential amino acids in the exact MAP ratio into one supplement: Smart Protein Blend.

Here's why this was exactly what my thyroid needed:

Step 1: All Eight Essential Amino Acids

Smart Protein doesn't just contain one or two amino acids.

It has all eight essential ones your body needs, including the three most crucial for thyroid function:

L-Methionine (35 mg) Essential for converting T4 to T3 in your liver. Without it, your thyroid hormones stay inactive and useless.

L-Lysine (185 mg) Helps your body absorb iron for energy production. This is why you're exhausted without it!

L-Phenylalanine (72 mg) Converts into tyrosine, the building block of thyroid hormones.

Plus L-Leucine, L-Valine, L-Isoleucine, L-Threonine, and L-Tryptophan, all working together in perfect harmony.

Step 2: Rapid Absorption Without Digestion

Because it follows the MAP formula, Smart Protein absorbs 80% faster than regular protein, bypassing your digestive system entirely.

This is crucial after 50 when our digestion weakens.

Regular protein takes hours to break down and you only absorb about 16%.

Smart Protein is designed to deliver a highly bioavailable blend of amino acids that your body can utilise quickly.

Step 3: Direct Thyroid Support

The MAP ensures these amino acids go directly where needed: to your liver for T4 to T3 conversion, to your cells for energy production, to your thyroid for hormone creation.

It's like giving your thyroid the exact key it needs to unlock energy again.

I'm not saying it's a miracle cure.

I'm saying it gave my thyroid what it needed to finally make energy again. That’s when things truly began to shift.

You Deserve Your Life Back

Greenleaf Blends offers a 365-day money-back guarantee on Smart Protein. A full year. Because they know what I know – when your thyroid gets what it needs, meaningful changes can follow.

The only risk is staying exhausted and missing more of your life.

A Letter to the Exhausted You

I know you're tired. Too tired to hope this might work. Too tired to try one more thing.

But touch your neck again. Feel your thyroid. It's not broken. It's not failing you on purpose. It just needs help.

Every day you wait is another day of exhaustion. Another invitation declined. Another moment missed.

I got my life back. My husband got his wife back. My family got me back.

You deserve the same.

Three years ago, I was where you are now. Today, I'm living proof that exhaustion doesn't have to be your story.

Your life is waiting for you to come back to it.

Note: Smart Protein is not a stimulant or medication. It's simply the amino acids your thyroid desperately needs. With a 365-day guarantee, you have nothing to lose except the exhaustion that's stealing your life.

About the editor

Liz Hart, 64, spent three years prisoner to exhaustion before discovering the thyroid-amino acid connection. She now dedicates her time to helping others reclaim their energy and their lives.

Addendum to the article

Since the publication of this article, many of you have asked questions. That is why I would like to briefly discuss the most important ones:

Should I continue taking my thyroid medication in addition to Smart Protein?

Yes absolutely! Please do not stop taking your medications. Smart Protein is not a drug for hypothyroidism. The amino acids it contains simply support the body in producing T4 and converting it into T3. You can use Smart Protein alongside your medications. If you feel better, you can gradually reduce your thyroid medication in consultation with your doctor. It's best to do this while checking your thyroid levels regularly.

What is the best way to take Smart Protein?

The recommended dosage is 3 to 6 capsules per day. Start with 3 per day in the morning and add 3 more capsules after dinner if necessary.

Can I use Smart Protein in addition to my medications?

Yes. Smart Protein consists of completely natural amino acids. For example, if you ate a very large amount of meat, your body would also absorb a large amount of amino acids. However, give priority to existing medications when taking them. This means, for example, that if you need to take your existing medications on an empty stomach, you should plan the intake of Smart Protein in such a way that there is no conflict with other medications. When you take Smart Protein is generally not that important.

Can I use Smart Protein even if I don't have a thyroid?

Yes, even then you will feel positive effects. Amino acids are the building blocks of the body and give you energy, even if you no longer have a thyroid gland.

What ingredients does Smart Protein contain?

Smart Protein consists of 100% of the following amino acids: Ingredients per dosage of 3 capsules: L-Leucine 205 mg L-valine 141 mg L-isoleucine 115 mg L-lysine 185 mg L-Phenylalanine 72 mg L-Threonine 141 mg L-methionine 35 mg L-Tryptophan 37 mg L-Histidine 37 mg

What makes Smart Protein different from other amino acids?

Smart Protein is based on the Human Amino Pattern, which was researched at the University of Florida. It impresses with its purest quality and 99% bioavailability. Moreover, it is produced in Netherlands under the highest quality standards.

Is there a guarantee?

Yes! Greenleaf blends has a 100% satisfaction guarantee. Their product page states: “not satisfied = money back.” So if you are not satisfied with the result, you will get your money back in full.

Will I be charged again later, or is this a subscription?

No need to worry — this is a one-time purchase only. We don’t have automatic subscriptions or recurring charges. You’re in full control, always. If you wish to reorder later, you can do so at any time — no commitments required.

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Bronnen (originele studies in het Engels):

Effecten van glutathion op joodthyronine 5'-deiodinase-activiteit: https://pubmed.ncbi.nlm.nih.gov/3383773/