What's actually happening in your body, and how to use both of them smarter.
Zyn pouches in the dugout. Pre workout before lifts. Espresso on the drive to the field. Nic pouches between innings.
Nobody in sports performance is talking about what these substances are actually doing at the cellular level. Not the surface level "caffeine gives you energy" stuff. The real biology. What they provide, what they take, and how to use them without quietly undermining the foundation your performance sits on.
Both of these compounds have legitimate benefits. Both of them have costs. And the costs are specific enough that you can actually do something about them, if you understand the biology.
Let's get into it.
Nicotine
Nicotine is genuinely useful. That's why everyone uses it. It sharpens focus, speeds up reaction time, and creates a feeling of locked in alertness that athletes love. The research backs this up. Nicotine enhances working memory, improves attention, and produces measurable improvements in cognitive processing speed. There's even neuroprotective research showing it may protect against certain types of cognitive decline. Peat noted that nicotine has anti-estrogenic properties and can antagonize some effects of serotonin, both of which he considered beneficial.
So no, you're not imagining the benefits. They're real.
But here's what most people don't understand about how those benefits are being produced. Nicotine doesn't generate energy. It triggers a massive release of catecholamines, your body's fight or flight chemicals. Adrenaline and noradrenaline flood your system. Cortisol spikes. Dopamine surges. The sharpness you feel is your stress response being activated at full blast.
Ray Peat described this dynamic clearly. When a substance stimulates metabolism through stress pathways rather than genuine mitochondrial improvement, you're whipping a tired horse. Output goes up, but the cost is resource depletion. Think of it like pulling from your savings account and feeling rich. The checking account looks great, but you're not actually wealthier. You're redistributing.
The resources nicotine burns through are specific, and they're the exact ones your body needs for energy production, recovery, and adaptation:
Magnesium. Every time your catecholamines spike, your kidneys dump magnesium. The cortisol spike makes it worse, pulling magnesium from intracellular stores. Your body runs on Mg-ATP, meaning every molecule of usable energy requires magnesium bound to it. Less magnesium means less functional energy, more cramping, worse sleep, higher anxiety, and slower recovery. Smokers show 15 to 20% lower magnesium levels. Pouch users haven't been studied as thoroughly, but the catecholamine pathway is identical.
B6. Your liver uses B6 to process nicotine. Every dose burns through pyridoxal phosphate, the active form. On top of that, nicotine triggers inflammation that activates the kynurenine pathway, another major B6 drain. B6 is a cofactor for over 100 enzymatic reactions including neurotransmitter synthesis. When it drops, you feel it as brain fog, irritability, and poor coordination. Smokers show 30 to 50% lower B6 levels.
Folate. Nicotine generates oxidative stress that degrades folate directly. Lower folate means impaired DNA repair and compromised methylation, the system your body uses to turn genes on and off. Athletes need robust methylation for recovery and adaptation.
Vitamin C. Each cigarette burns through roughly 25 to 30 milligrams of vitamin C handling the oxidative load. Even without combustion, nicotine itself generates enough oxidative stress to lower C levels. Vitamin C is essential for collagen synthesis (tendons, ligaments, connective tissue), immune function, and iron absorption.
NAD+. Nicotine activates PARP enzymes that consume NAD+ for DNA repair. NAD+ is the central currency of your mitochondria. When it drops, your entire energy production system slows down. Think of it as your power grid running at 60%.
The irony is worth sitting with. The sharpness and focus nicotine gives you right now comes at the expense of the very nutrients your brain and body need to produce sharpness and focus tomorrow. It's not that nicotine doesn't work. It does. It just sends you the bill later.
And dosage matters here. A lot. The cognitive benefits, the focus, the reaction time, the working memory improvement, those show up at low doses. One regular strength pouch. A small amount. But the stress hormone response and resource depletion scale with every additional dose. You get most of the upside from a little. Past that, you're just stacking biological cost without stacking more benefit. The guy going through a can a day isn't ten times sharper than the guy using one or two. He's just depleting ten times faster.
The Nicotine Offset
You're getting real benefits from nicotine and you're probably not quitting tomorrow. Fair enough. Here's how to cover the biological cost so you're not slowly digging a hole.
Magnesium glycinate or malate, 300 to 400mg daily. Non-negotiable. You're losing magnesium every time your catecholamines spike. Glycinate and malate are the most bioavailable forms and won't wreck your stomach. Take it in the evening. It'll help your sleep too.
B6 as P5P (pyridoxal 5' phosphate), 25 to 50mg daily. P5P is the active form, so your liver doesn't have to convert it. This directly replaces what your body is burning through to metabolize nicotine and handle the downstream inflammation.
Vitamin C, 500 to 1000mg daily. Higher end if you're a heavy user. Covers the oxidative cost. Spread it across the day rather than one big dose.
Methylfolate, 400 to 800mcg daily. Keeps your methylation system running. Important for recovery, adaptation, and keeping homocysteine in check.
Niacinamide, 100 to 250mg a couple times a day. Supports NAD+ levels directly. Peat was a big proponent of niacinamide for mitochondrial support. It directly addresses the NAD+ drain that nicotine causes and it's one of the most important B vitamins for cellular energy production.
This isn't about making nicotine "healthy." It's about not letting a compound you're choosing to use quietly drain the foundation underneath your performance. Replace what's being taken and you stay in the game.
Caffeine
Caffeine gets lumped in with nicotine as "just another stimulant," but the biology tells a completely different story. Where nicotine stimulates through stress hormones, caffeine operates through a mechanism that Peat considered genuinely protective.
Peat went so far as to call caffeine a "vitamin-like nutrient." Strong claim. But the reasoning is solid.
Caffeine blocks adenosine receptors. Adenosine accumulates as your cells use energy, signaling fatigue. When caffeine blocks those receptors, it doesn't just mask tiredness. It shifts your mitochondria toward more efficient fuel use. Sugar oxidation increases. Carbon dioxide production goes up, which in Peat's framework is a sign of healthy, efficient metabolism, not a waste product. Lactic acid production decreases.
Peat wrote that "caffeine increases the oxidation of sugar" and that metabolically, "this increases the production of carbon dioxide." Your cells running on oxidative phosphorylation rather than the inefficient backup of glycolysis. That's the good stuff.
But it goes further. Coffee is a significant source of magnesium and B1 (thiamine). Peat pointed this out directly: "Coffee provides very significant quantities of magnesium, as well as other nutrients including vitamin B1." It's also one of the best dietary sources of niacin. These are the exact B vitamins your mitochondria need to function.
Caffeine has direct cell protective functions that parallel niacinamide, one of the most important B vitamins for mitochondrial health. It inhibits serotonin release (which Peat considered almost universally beneficial). It synergizes with thyroid hormone and progesterone, both protective substances in the bioenergetic framework. There's robust epidemiological data linking coffee consumption to reduced rates of several cancers, Parkinson's, type 2 diabetes, and liver disease.
So what's the cost? It's real, but it's manageable.
Caffeine reduces magnesium reabsorption in the kidneys slightly, from about 97% to about 94%. That matters over time, but it's partially offset by the magnesium coffee itself delivers. The polyphenols in coffee (not the caffeine itself) can inhibit iron absorption by 50 to 90% when consumed with a meal. If you're an athlete with borderline iron status, just time your coffee away from iron rich meals. Give it an hour on either side.
Caffeine raises cortisol acutely, about a 30% spike within an hour. But tolerance to this effect develops within about 5 days of regular use. Habitual coffee drinkers don't show the same cortisol response that first time users do. This is a meaningful difference from nicotine, where the cortisol elevation is chronic and doesn't fully habituate.
Same principle as nicotine: dosage matters. The metabolic and protective benefits show up in the range of 1 to 3 cups of coffee a day (roughly 100 to 300mg of caffeine). Past about 300 to 360mg is where the mineral excretion and cortisol effects start to become significant. The benefits don't keep scaling. The costs do. More isn't better. Enough is better.
The smart play: Coffee over pre workout. You get the magnesium, the niacin, the B1, and the cell protective effects instead of just isolated caffeine with artificial junk. Time it away from iron rich meals. Supplement magnesium regardless (most athletes should). That covers caffeine's main cost while you collect all the upside.
The Bigger Picture
Here's the framework that ties this together.
Nicotine and caffeine both make you feel more energized. They both have real, measurable benefits. But they get there through fundamentally different biological mechanisms.
Nicotine works by extraction. It forces your adrenal system to dump stress hormones, liberating stored resources. You get the focus, the reaction time, the sharpness. Then you pay for it. The resources that got mobilized, particularly magnesium, B6, and NAD+, are the same ones your mitochondria need to produce energy tomorrow.
Caffeine works by efficiency. It shifts your cells toward better fuel utilization. More sugar oxidation, more CO2 production, less lactic acid. And the vehicle that delivers it (coffee) replenishes some of the very nutrients the energy system needs.
In Peat's framework, anything that genuinely supports oxidative metabolism is protective. Anything that stimulates through stress pathways is costly to tissue over time. Caffeine falls on one side. Nicotine falls on the other.
That doesn't make nicotine useless. It makes it a tool with a specific cost. And now you know exactly what that cost is and how to cover it.
The Bottom Line
Your mitochondria need a handful of specific nutrients to produce energy: magnesium, B vitamins (especially niacinamide, riboflavin, and thiamine), and NAD+. That's the biological foundation your strength, your speed, your focus, and your recovery all sit on.
If you're using nicotine, you're running through those resources faster than someone who isn't. That doesn't make you weak. It makes you someone who should be more intentional about replacing what you're using up. Cover the cost and you keep the benefits without quietly eroding the base.
If you're using caffeine, especially as coffee, the biology is largely in your favor. Keep your nutrition solid, time it right, and you're probably doing yourself more good than harm.
Know the cost. Cover the cost. Keep performing.
Ray Peat's article "Caffeine: A Vitamin-Like Nutrient, or Adaptogen" lays out the case for caffeine as a genuinely protective substance. His work on protective steroids (pregnenolone, progesterone) and thyroid hormone provides the broader framework for understanding why cellular energy is the master variable in performance. If you want to go deeper, start there.
