Top 5 Supplements to Avoid

The last one is by far the most misunderstood.

We’ve been conditioned to believe that modern health requires a shelf full of powders, capsules, and “must-have” miracle nutrients. And there actually is a lot of nuance here, because that is true to some degree, we should always approach it from the lense of ‘Modern Problems Require Modern Solutions’ but we have to be mindful of what those modern solutions actually represent.

Without clarity on your metabolism, thyroid function, stress state, hormones, digestion, liver health, blood sugar stability and mineral balance, adding more supplements can be like pouring petrol on a fire. What looks supportive on paper can actually become destructive in practice.

A supplement isn’t automatically “healthy” just because it’s sold in a health store, there’s a huge deception at play here. A micro-nutrient can be helpful in one context and harmful in another. In a body already under stress, low in energy, inflamed, hypothyroid, estrogen-dominant, or poorly digesting food, the wrong supplement can intensify the very symptoms you’re trying to fix.

Modern health through a wider conscious lens is less about forcing the body with trendy compounds like peptides and more about restoring energy production, supporting thyroid function, lowering unnecessary stress signals, improving digestion and gut health, and using food intelligently before reaching for pills and powders. So many of the “preventive” and “alternative” health ideas can be dangerous when they are detached from our own physiology.

So if you want a real “supplement blacklist” here are five of the biggest offenders.

1 - Calcium supplements

Calcium is one of the most commonly promoted supplements in the world. It’s sold as essential for bones, teeth, nerves, hormones, and aging well. And yes calcium is super important, but the problem is that taking isolated calcium pills is not the same thing as getting balanced calcium from food.

Excess calcium in the wrong context can be inflammatory, suppressive, and physiologically stressful. In his work, Calcium has been known as promoting blood clotting, lowering blood sugar, decreasing kidney function when excessive, facilitating histamine-related reactions, and opposing some of the protective effects of magnesium and progesterone. Calcium overload has also been linked with vascular spasms and tissue stress, especially when an individuals metabolic function is poor. 

Why calcium supplements can backfire

1. They ignore the bigger mineral picture. Calcium does not work in isolation. Its effects are tied to magnesium, sodium, vitamin D, vitamin K, thyroid function, protein intake, and carbon dioxide status. When those are off, forcing calcium can worsen imbalance rather than correct it.
2. They can increase calcification risk in the wrong person. Many people don’t have a calcium deficiency, they have a problem with calcium regulation. Poor thyroid function, stress, inflammation, excess estrogen, low magnesium, and poor respiratory/metabolic function can all push calcium into the wrong places.
3. They’re often used without understanding parathyroid stress. Many bone problems are not solved by mega-dosing calcium. They may reflect poor metabolism, elevated parathyroid hormone, low vitamin D, low protein, low thyroid, inflammation, or chronic stress.

What to use instead:

A better strategy is usually: • Get calcium from food first, especially dairy when tolerated • Use milk, cheese, yogurt (Preferably unpasteurised), and broth-balanced meals • Support magnesium, vitamin D, vitamin K, protein, and thyroid function • Improve metabolic health so calcium is used properly, not shoved into tissues 

Calcium is one of the most misunderstood nutrients because it’s often reduced to only “bone health,” when in reality it plays a central role in the entire bioenergetic system of the body. Calcium is deeply tied to metabolic stability, nerve regulation, muscle contraction, hormone signaling, and cellular energy balance. At the cellular level, calcium helps regulate excitability and too much intracellular calcium in the wrong context can signal stress, inflammation, and even cell damage, while properly regulated calcium supports structure, communication, and resilience. It works in constant relationship with magnesium, sodium, potassium, carbon dioxide, and hormones like parathyroid hormone, thyroid hormone, and progesterone, meaning its function depends entirely on the metabolic environment it exists within. Adequate calcium especially from well-balanced foods like dairy can help lower parathyroid hormone, reduce stress signaling, support bone integrity, stabilise nerves, and even improve sleep and mood indirectly by promoting a more relaxed physiological state.

The bottom line here is the fact calcium is not the enemy, but blind calcium supplementation is the problem. If your metabolism is poor, your hormones are off, or your magnesium status is low, calcium pills may aggravate more than they help.

2 - Melatonin Supplements

The “sleep hormone” that can reinforce a low-energy state rather than fix it

Melatonin is widely marketed as a natural solution for poor sleep, stress, and circadian rhythm issues. It’s positioned as gentle, safe, and restorative, something your body already makes, so supplementing it must be beneficial. But this framing misses a critical point:

Melatonin production is not a performance hormone, it is a signal of darkness, reduced energy demand, and metabolic downshifting.

Melatonin is closely tied to stress physiology, serotonin metabolism, and environmental cues like darkness and seasonal changes. It is downstream of tryptophan and serotonin, both of which are associated with stress, inflammation, and metabolic suppression when elevated chronically. In that sense, melatonin is not inherently “healing” it is more often than not a marker of a system preparing to slow down, withdraw, and conserve energy.

Why melatonin supplementation can be counterproductive:

1. It promotes sedation, not restoration Melatonin can make you fall asleep, but falling asleep is not the same as restoring metabolic health. Many people who rely on melatonin experience deeper sedation but wake up groggy, colder, and less energetic. This reflects a reduction in metabolic rate rather than an improvement in cellular energy production.
2. It reinforces a low metabolic state Melatonin rises in conditions of darkness, cold, and reduced activity, essentially mimicking a winter-like physiology. In someone already dealing with low thyroid function, chronic stress, or poor energy production, adding melatonin can push the body further toward conservation rather than repair. Instead of fixing sleep, it can deepen the underlying sluggishness.
3. It bypasses the real causes of poor sleep Sleep problems are rarely caused by a melatonin deficiency. More often, they are driven by: • Low blood sugar during the night • Elevated stress hormones (cortisol, adrenaline) • Poor glycogen storage • Low thyroid function • Inflammation and endotoxin • Poor light exposure during the day • Mineral imbalances

Melatonin does not address any of these, it simply overrides the system.

1. It is tied to serotonin and stress pathways: Melatonin is synthesised from serotonin, and serotonin is often elevated in stress states rather than deficient. Increasing this pathway artificially through melatonin or its precursors can reinforce a biochemical pattern associated with fatigue, passivity, and reduced resilience.
2. It can disrupt natural circadian signaling: Your body’s melatonin rhythm is meant to be naturally occuring, responsive to light, food, temperature, and activity. Taking melatonin externally can blunt this natural production, making the body less responsive to environmental cues and more dependent on supplementation over time.

A better approach to sleep (without melatonin)

Instead of sedating the system, the goal is to remove the reasons your body can’t relax: • Stabilise blood sugar: eat regularly, include adequate carbohydrates, and consider a small bedtime snack (e.g., fruit, juice, honey, milk) to prevent nighttime stress hormone spikes • Support thyroid and metabolism: warm hands and feet, stable energy, and a healthy pulse are better indicators of sleep readiness than supplement use • Get bright light during the day: especially morning light, which helps anchor circadian rhythm naturally • Reduce evening stress signals: avoid under-eating, excessive exercise, and overstimulation late at night • Support mineral balance: sodium, magnesium, and potassium all influence nervous system calmness • Improve digestion: gut irritation and endotoxin can significantly disrupt sleep through stress signalling

Bottom line for Melatonin is the fact it is not inherently harmful, but its routine use is often misguided. It can create the illusion of better sleep while masking the real issue: a body that lacks sufficient energy to maintain a stable and restorative circadian rhythm. Good sleep is a also a byproduct of a good metabolism, not something that should be chemically imposed without addressing the root cause initially.

3 - Iron Supplements 

Iron is one of the most commonly recommended supplements for fatigue, especially in women. Low energy, dizziness, hair loss, cold hands and feet, poor exercise tolerance, these symptoms are often quickly labeled as “low iron,” and supplementation is prescribed almost automatically a lot of the time.

From our understanding this is one of the most dangerous oversimplifications in modern health as Iron is not just a nutrient, it is a highly reactive metal that can drive oxidative stress and systemic complications when misused.

While iron is essential for oxygen transport and cellular respiration, its behaviour in the body is tightly regulated for a reason. Free iron can catalyse the formation of damaging free radicals, accelerating tissue damage, inflammation, and aging. This is why the body carefully controls iron absorption, storage, and recycling.

The problem is that supplementation often ignores this complexity.

Why iron supplementation can be harmful:

1. Iron is inherently pro-oxidative Iron participates in chemical reactions that generate free radicals. In a well-regulated system, this is controlled, but in a stressed, inflamed, or metabolically compromised body, excess iron can amplify oxidative damage to cells, mitochondria, proteins, and DNA. Rather than improving energy, it can worsen the very processes that lead to fatigue.
2. Fatigue is rarely just an iron issue One of the biggest mistakes is equating fatigue with iron deficiency. In reality, low energy is far more often driven by: • Low thyroid function • Inadequate calorie or carbohydrate intake • Chronic stress hormone elevation • Poor sleep • Blood sugar instability • Inflammation or infection • Poor digestion and nutrient absorption

Iron becomes a convenient explanation, but not necessarily the correct one.

1. The body accumulates iron easily, but removes it poorly. Unlike many nutrients, iron does not have a robust excretion pathway. If you take more than you need, it can accumulate over time, particularly in tissues like the liver, brain, and heart. This accumulation is associated with increased inflammation, metabolic dysfunction, and degenerative processes.
2. Iron interacts negatively with stress and hormones. Iron’s effects are not isolated as it interacts directly with hormones, especially estrogen. Estrogen can promote iron retention, and together they can increase oxidative stress and tissue damage. This creates a compounding effect: a stressed system holds onto more iron, and more iron increases stress.
3. Supplementation bypasses natural regulation. Dietary iron absorption is tightly controlled by the body based on need. Supplemental iron, especially in high doses, can override this system, flooding the body regardless of whether it is actually required.

When iron is appropriate:

There are situations where iron supplementation is necessary, such as confirmed iron deficiency anemia. But this should always be determined through proper testing, including: • Hemoglobin • Ferritin • Transferrin saturation • Serum iron • Clinical symptoms in context

Even then, the goal should be targeted, temporary correction, not indefinite supplementation.

A better approach to low energy (without defaulting to iron)

Instead of assuming iron deficiency, a more effective strategy is to address the foundations of metabolism: • Support thyroid function: often the true driver of energy production • Eat enough carbohydrates: to maintain glycogen and reduce stress hormones • Increase protein intake: for tissue repair and metabolic support • Improve digestion: so nutrients are actually absorbed • Reduce inflammation: especially from gut irritation and endotoxin • Stabilise blood sugar: to prevent adrenaline-driven fatigue

If iron is needed, it can often be supported more gently through food sources in a balanced dietary context, rather than aggressive supplementation.

Bottom line for Iron is that is essential, but it is also potentially damaging when taken unnecessarily. It is not a harmless “energy booster” as it is a powerful compound that should only be used with clear evidence of it’s need. From a bioenergetic and holistic perspective, real energy doesn’t come from forcing oxygen transport with more iron, it comes from improving the body’s ability to use oxygen efficiently through better metabolism, better thyroid function, and lower stress.

4- 5-HTP, Tryptophan Powders, The “Mood Boosters

Few supplements are marketed as aggressively, and as misleadingly as serotonin boosters.

5-HTP, tryptophan powders, and various “mood blends” are sold as natural solutions for anxiety, depression, poor sleep, and emotional instability. The underlying message is simple:

“Low mood = low serotonin → take this to fix it.”

But this entire framework is fundamentally flawed as serotonin is not inherently a “happiness chemical.” In many contexts, it is a stress mediator that promotes inhibition, inflammation, and metabolic suppression.

Tryptophan is the amino acid precursor to serotonin, and 5-HTP is one step closer in that pathway. Supplementing either effectively pushes the body to produce more serotonin, and downstream, more melatonin. While this can create short-term calmness or sedation, it often comes at the cost of reduced energy, motivation, and physiological resilience.

Why these supplements can be counterproductive

1. They promote sedation, not true emotional stability. Many people report feeling calmer after taking 5-HTP or tryptophan, but this is often a form of chemical dampening rather than genuine improvement. Serotonin tends to reduce excitability and promote passivity. This can feel like relief in the short term, but it doesn’t resolve the underlying drivers of low mood.

Over time, this can lead to a “flat” state, less anxiety, but also less motivation, clarity, and vitality.

1. Serotonin is often elevated in stress. There’s a lot of information challenging the idea that depression alone is caused by low serotonin. In many cases, stress, inflammation, endotoxin exposure, and poor metabolism actually increase serotonin activity. This means that adding more precursors can push an already dysregulated system further in the wrong direction.
2. Tryptophan has specific metabolic downsides Isolated tryptophan is not a neutral nutrient. In excess, it has been associated with: • Suppression of thyroid function • Increased serotonin production • Greater vulnerability to inflammatory and degenerative processes
3. They can impair energy production From a bioenergetic standpoint, high serotonin states are often associated with reduced mitochondrial activity and lower metabolic rate. Instead of enhancing energy and resilience, these supplements can contribute to fatigue, brain fog, and reduced physical and mental performance.
4. They may suppress immune and endocrine function Research cited in Peat’s work has shown that serotonin and its precursors can suppress aspects of immune function and alter hormonal balance. This is particularly relevant for individuals already dealing with chronic stress or inflammation.
5. They treat mood as a brain chemical problem instead of a whole-body issue Low mood is rarely just a neurotransmitter issue. It is often the result of: • Low thyroid function • Poor energy production • Blood sugar instability • Chronic stress hormone elevation • Inflammation and gut-derived endotoxin • Nutritional deficiencies • Lack of light exposure and circadian disruption

By focusing narrowly on serotonin, these supplements ignore the broader physiological context that actually determines mood.

A better approach to mood (without serotonin manipulation)

Instead of forcing neurotransmitter changes, the goal is to create a physiological environment where the brain naturally feels safe, stable, and energised: • Maintain stable blood sugar: regular meals with adequate carbohydrates reduce stress hormones • Support thyroid function: one of the most powerful regulators of mood, motivation, and mental clarity • Prioritize protein balance: avoiding excess isolated tryptophan while ensuring adequate overall protein • Improve gut health: reducing endotoxin lowers serotonin production in the intestine • Increase light exposure: especially morning sunlight to regulate circadian rhythm and mood • Reduce PUFA intake: to support mitochondrial function and lower inflammation • Ensure adequate minerals: particularly sodium and magnesium for nervous system stability

When these foundations are in place, mood tends to improve without needing to artificially push serotonin pathways.

Bottom line with 5-HTP, tryptophan powders, and many “mood blends” are built on an outdated and overly simplistic model of mental health. They may blunt symptoms in the short term, but they often do so by suppressing the very energy systems required for long-term resilience and well-being. True emotional stability is not created by forcing neurotransmitters, it’s created by supporting metabolism, reducing stress, and giving the body the energy it needs to function properly.

5 - Omega 3 / Fish Oil Supplements

Last but not least, this is one of the biggest health misconceptions, and one of the most promoted supplements in mainstream health. The “heart-healthy” fat that will potentialy suppress metabolism and increase oxidative stress.

Fish oil has been marketed for decades as one of the most essential supplements for modern health. It’s promoted as anti-inflammatory, protective for the heart, beneficial for the brain, and necessary because “we don’t get enough omega-3.”

The core issue is this: fish oil is extremely high in polyunsaturated fatty acids (PUFA), which are chemically unstable and highly prone to oxidation.

While they are often labeled as “essential” and “anti-inflammatory,” their biological effects are far more complex, and often harmful in excess.

Why fish oil supplementation can be counterproductive

1. Extreme instability and susceptibility to oxidation Omega-3 fats (EPA and DHA) are highly unsaturated, meaning they are structurally fragile. This makes them very prone to oxidation, both in the bottle and inside your body. Once oxidised, they form lipid peroxides and breakdown products that can damage cells, proteins, and DNA.

Peat repeatedly emphasized that these unstable fats can drive oxidative stress rather than reduce it, especially when consumed in supplemental doses.

1. “Anti-inflammatory” often means anti-metabolic Fish oil is often praised for lowering inflammation, but in many cases, this effect comes from suppressing metabolic activity. When the body’s energy production is reduced, inflammatory signals may temporarily drop, but this is not the same as true healing.

From a bioenergetic perspective, anything that lowers inflammation by slowing the system down can also reduce resilience, repair capacity, and overall vitality.

1. Promotion of lipid peroxidation and cellular damage. One of the key concerns raised is that fish oil increases lipid peroxidation, the chain reaction of fat oxidation within tissues. This process damages cell membranes, impairs mitochondrial function, and contributes to aging and degenerative disease, and this is also at the root of our skin being more susceptible to damage from UV light.
2. Suppression of mitochondrial energy production. Highly unsaturated fats can interfere with efficient energy production. They make cell membranes more unstable and can impair the function of enzymes involved in oxidative metabolism. The result is often lower energy output, increased fatigue, and reduced physiological robustness.
3. Increased vulnerability to stress hormones and estrogen. PUFA intake has been linked with increased sensitivity to oxidative stress and excess estrogen. These fats can amplify the effects of stress hormones, promote inflammation under certain conditions, and contribute to hormonal imbalance over time.
4. Accumulation in tissues with long-term effects. Unlike some nutrients, PUFA from fish oil can accumulate in bodily tissues and remain there for extended periods. This means their effects are not just short-term they can influence metabolism, inflammation, and cellular stability for months or even years.

The bigger misconception:

The popularity of fish oil is largely based on observational data and simplified narratives about “good fats vs bad fats.” But this ignores a key physiological principle:

The more unsaturated a fat is, the more reactive and unstable it becomes. From this perspective, regularly consuming concentrated doses of highly unstable fats is not protective, it increases the burden of oxidation the body must manage.

A better approach to fats

Instead of relying on fish oil supplements, a more stable and supportive approach focuses on: • Reducing overall PUFA intake (seed oils, processed foods, nuts, excess fatty fish) • Emphasising more stable fats, such as: • Coconut oil • Butter • Dairy fats • Using whole foods rather than isolated oil extracts • Supporting metabolism so the body can handle fats efficiently

Bottom line here, Fish oil is marketed as protective, but its high instability, tendency toward oxidation, and suppressive effects on metabolism make it questionable especially when used chronically.