I’m a Metabolic Health Specialist: Here’s What Supplements Are Actually Worth Taking

September 9, 2026

I’m a Metabolic Health Specialist: Here’s What Supplements Are Actually Worth Taking

What to avoid, and why quality matters more than the price tag

You cannot out-supplement a poor diet. Full stop. And you do not need a counter full of pills and powders to be healthy. In fact, for most people, there are only a few supplements worth taking.

You wouldn’t know that by scrolling through social media. Sharper thinking, deeper sleep, longer life, and glowing skin – just pop a pill, and your problem is solved. Most of these products are built on half-truths and hype.

If you’re new to Nest Wellness, I’m Beth Bollinger, a certified holistic nutritionist and integrative health practitioner. I teach people how to eat for metabolic health, stable blood sugar, strong muscle and vibrant longevity. I also write the #1 rising Health & Wellness publication on Substack. Subscribe here to receive expert Q+As, delicious recipes designed for metabolic health and practical wellness guidance every week.

The Supplement Reality Check

The hard truth about supplements is that the dietary supplement industry is largely unregulated. Many popular over-the-counter bottles have no independent certification of product integrity – meaning what is on the label isn’t always what is in the capsule.

Let’s take melatonin, a popular (and overused) supplement.

Researchers tested 25 melatonin gummies in the U.S. to see if the label matched what was actually inside the bottle. The results:

22 of 25 products were inaccurately labeled
Only 3 contained an amount within 10% of what the label claimed
The actual melatonin content ranged from 74% to 347% of the labeled dose
One product even had no detectable melatonin at all (but did it contain CBD)

Melatonin is not something you want to mess around with – it’s a hormone that influences your circadian rhythm. Too little, and it doesn’t work. Too much, and you risk disrupting your own body’s production of it. This problem isn’t just sloppy labeling from one bad brand – it’s a snapshot of the industry with little oversight.

Nest Wellness recommended nutritional supplements

The Role of Supplements

Supplements are called supplements for a reason. They are meant to fill in gaps – not replace things like real food, sunlight, movement, or sleep. If your nutrition is good and your health markers and labs look good, you probably don’t need much. But if your testing shows that you are genuinely low in something – vitamin D, magnesium, B12 – then the right supplement, taken consistently, can make a real difference.

Best practice: Don’t guess. Get labs done. And only buy from a reputable source.

What Researchers Say Is Worth Taking

Here is a short list of supplements with the strongest evidence to support their use:

Vitamin D

Why it’s recommended: Correcting low vitamin D improves bone and muscle health, reduces falls in older adults, and lowers the risk of respiratory infections in people with deficiency.

Who benefits most: People with low blood levels – common in higher latitudes, winter months, darker skin, limited sun exposure, older age, or indoor lifestyles.

Vitamin B12

Why it’s recommended: B12 is essential for nerve function and red blood cell formation; deficiency causes anemia and neuropathy.

Who benefits most: Vegans/vegetarians, adults over 50, people on metformin or acid‑reducing meds, and those with malabsorption.

Magnesium (glycinate and/or threonate)

Why it’s recommended: Magnesium is a cofactor in hundreds of enzymes; correcting low intake/status supports blood pressure, glucose metabolism, muscle function, and may improve sleep quality.

Who benefits most: People with low dietary intake (common in Western diets), those with cramps, poor sleep, or certain metabolic risks.

Creatine monohydrate

Why it’s recommended: One of the most studied ergogenic aids; improves strength, power, and lean mass with resistance training, and shows emerging benefits for cognitive function in older adults.

Who benefits most: People doing strength or high‑intensity training; older adults aiming to preserve muscle and function; some evidence for brain health.

Omega-3s (EPA/DHA)

Why it’s recommended: Omega‑3s reliably lower triglycerides and, at prescription‑strength or EPA‑dominant doses, reduce cardiovascular events in high‑risk groups.

Who benefits most: People who rarely eat fatty fish, those with elevated triglycerides, and some high cardiovascular risk patients.

There are other promising supplement options out there, but these are the MVPs. And even these come with a caveat worth repeating – supplements are meant to be the last few percent of a health plan, not the foundation. Real food, quality sleep, movement, and stress management do the heavy lifting, and no pill can replace them.

Why Quality Matters

Here’s what most people don’t realize: unlike prescription drugs, dietary supplements in the US aren’t required to be reviewed by the FDA for safety or effectiveness before they land on a shelf. The FDA’s oversight is mostly reactive; problems get addressed after the fact, not before a product is sold.

And the manufacturing side isn’t much more reassuring. In one FDA audit, 70% of dietary supplement manufacturers were found to be out of compliance with basic good manufacturing practices. Third-party testing programs (USP, NSF, Informed-Sport, ConsumerLab) exist to fill that gap, but they’re entirely voluntary.

A separate lab analysis of 58 bottles of common herbal supplements, including brands available at major retailers, found significant inconsistency in potency between bottles of the same product from the same manufacturer. Around 60% of the bottles tested also showed some degree of fungal contamination.

None of this means supplements are dangerous across the board. It means the bottle on the shelf is not a guarantee of what’s inside it, and it’s worth being deliberate about where you buy.

How to Spot a Good Supplement Producer

Third-party testing. Look for NSF Certified, USP Verified, Informed-Sport, or ConsumerLab seals.
No proprietary blends. If a company won’t disclose the exact dose of each ingredient, that’s a red flag, not a trade secret.
Research-backed dosing. An underdosed “trendy” ingredient isn’t worth paying for.
A full ingredient list — not just a drug fact panel. A drug fact panel only requires companies to disclose active ingredients, which means fillers and additives can legally stay hidden. Always look for the complete list.

Red Flags to Watch for on the Label

Flow agents: magnesium stearate, stearic acid, synthetic silicon dioxide
Artificial additives: Red 40, Yellow 6, Blue 1, titanium dioxide, BHT/BHA, artificial flavors and sweeteners
Problematic binders: synthetic microcrystalline cellulose, polyethylene glycol (PEG), polysorbate 80

If the ingredient list reads like a chemistry experiment, look for a cleaner option. Quality supplements use minimal, necessary fillers, not a laundry list of them.

Why I Don’t Buy Supplements on Amazon

Amazon is convenient, but it’s a gamble for supplements specifically. You could be buying from a reseller rather than the actual brand. The product may have sat in a hot warehouse for months. It could be expired, or in rare cases, counterfeit or tampered with.

If you’re taking something daily, buy it directly from the brand’s site or a trusted, verified dispensary. This is exactly why I use Fullscript — it’s a professional-grade dispensary that only carries vetted, practitioner-trusted brands, so you’re not gambling on what’s actually in the bottle. If you don’t have an account yet, you can set one up here and get 20% off, always.

Nest Wellness recommended nutritional supplements supported by researchers

The 5 Supplements I Take Every Day

While I prioritize nutrients from food first, I’ve found certain supplements to be genuinely valuable during menopause. My non-negotiables:

Vitamin D3/K2 – This is the one I take daily in the winter and every other day in the summer to keep my vitamin D levels optimal.

Balance activated B vitamins – The cleanest, most bioavailable B vitamins available. Use code NEST10 to save.

Magnesium (Glycinate and/or Threonate) – These are my favorite brands for sleep and cognitive support.

Creatine Monohydrate – This is the creatine I use in my morning tea to maintain muscle and brain health.

Omega-3s (EPA/DHA) – This is the brand I trust for heart and brain support.

Protein (Whey or Plant-Based) – Mt. Capra goat whey is a favorite of mine – I find the A2 protein in goat and sheep dairy easier to digest. Use code NEST10 to save. For plant-based protein, I like Ora Organics So Lean, So Clean – always 20% off on Fullscript.

Why this works for me: menopause creates specific nutrient needs that can be genuinely hard to meet through diet alone. These targeted supplements address the real challenges that come with declining and disappearing hormones, bone density, cardiovascular health, cognitive function, and emotional well-being. I’ve found this personalized approach far more effective than a generic “menopause formula” that may contain insufficient amounts of the nutrients that actually matter.

You can find the exact brands I trust for each of these on my Fullscript dispensary (receive 20% off, always).

The Takeaway

Most supplements won’t do much for you, but a few genuinely can but only if:

you actually need them
you buy from a quality source
you don’t let them replace the real habits that do most of the work

Before you drop $50 on something an influencer swears “changed their life,” ask yourself: have I fixed the basics?

Eat real food.

Move daily.

Sleep enough.

Get outside.

Manage stress.

Then — and only then — consider supplements. Test. Simplify. Choose quality. And if you’re not sure? Don’t buy the bottle.

Beth🧡

P.S. For more on nutrition, metabolic health, and the research behind what actually works, subscribe to Nest Wellness on Substack — new posts land every week.

I’m a Metabolic Health Specialist: Here’s What Supplements Are Actually Worth Taking