Statins and Nutrient Deficiencies: Which Nutrients Drop And How I Approach Them
Statins lower cholesterol and reduce cardiovascular risk when prescribed for an appropriate indication. New symptoms during treatment deserve a review. [1]
Tiredness or muscle pain has several possible causes. These symptoms alone do not show that a statin has caused a nutrient deficiency. [1]
A review can consider symptoms, medicines and relevant nutritional concerns while preserving the cardiovascular benefit of treatment. [1]
This article considers claims about statins and nutrients. A change in a blood measurement or a laboratory pathway does not by itself establish a deficiency that needs a supplement. [1]
What statins actually do inside the body
Statins (HMG-CoA reductase inhibitors) block the enzyme HMG-CoA reductase, a key control point in the “mevalonate pathway”, the biochemical route the liver uses to make cholesterol.
When this enzyme is blocked:
The liver makes less cholesterol.
LDL receptors on liver cells increase, so more LDL-cholesterol is cleared from the blood.
Downstream products of the same pathway fall as well – not only cholesterol, but also coenzyme Q10 (CoQ10), dolichols, prenylated proteins and other isoprenoids.
These pathways explain research questions, but they do not establish that every statin user has a nutrient deficiency or needs supplements. [1]
How a cholesterol drug can influence nutrient status
Two broad mechanisms show up repeatedly in the research:
Blocking endogenous synthesis
CoQ10 is made in the same pathway as cholesterol. When statins slow that pathway, CoQ10 production drops as well.
Changing transport, activation or use of nutrients
Studies of vitamin D and statins report varied findings. An association between a low vitamin D level and muscle symptoms does not show that statins caused the low level. [1]
Proposed effects on vitamin-K-dependent proteins and selenoproteins are mechanistic hypotheses. They do not establish a reason to stop a statin or routinely add supplements. [1]
In functional medicine I treat statins as one piece of a wider cardiometabolic picture: medication, nutrient status, mitochondrial energy production, inflammation, and lifestyle all sit in the same network.
Coenzyme Q10 – the classic statin-related deficiency
This legacy heading is retained for review. Lower circulating CoQ10 does not establish a clinical deficiency in every statin user. [2]
Why CoQ10 matters
CoQ10 sits in every mitochondrial membrane and helps shuttle electrons along the respiratory chain so that cells can make ATP. It also works as a lipid-soluble antioxidant in membranes and lipoproteins.
The following symptoms are non-specific and cannot be used to diagnose CoQ10 deficiency in a person taking a statin: [1]
Fatigue and exercise intolerance
Muscle weakness and myalgia
New breathlessness or other possible heart-failure symptoms need medical assessment; do not assume that CoQ10 depletion explains them. [1]
What statins do to CoQ10
Statins can reduce circulating CoQ10. This does not necessarily establish a clinically important tissue deficiency or identify the cause of a person’s muscle symptoms. [2]
Examples:
A JAMA Neurology study showed that atorvastatin reduced plasma CoQ10 levels in treated patients.
Mechanistic explanations involving CoQ10 remain different from evidence that supplementation improves a patient’s symptoms or cardiovascular outcomes. [2]
Muscle symptoms need a clinical assessment rather than an automatic diagnosis of CoQ10 deficiency. Other illnesses, activity and interacting medicines may be relevant. [1]
In practice this does not mean every statin user becomes CoQ10-deficient, yet the direction of change in levels is clear.
CoQ10, muscle symptoms and mitochondria
Muscle symptoms (SAMS – statin-associated muscle symptoms) feel very real for patients, even though large trials suggest that only a smaller fraction of muscle pain in statin users is directly caused by the drug.
Several studies looked at whether statin-related muscle pain runs alongside mitochondrial changes and CoQ10 levels:
A 2019 study found reduced mitochondrial respiration in statin-treated muscle, especially complex II-linked respiration, with associations to myalgia.
Animal work shows that adding CoQ10 can reverse statin-related mitochondrial dysfunction and improve oxygen utilisation.
Does CoQ10 supplementation help?
This question often comes up in clinic. The answer from the literature is mixed, so I discuss it transparently with patients:
Some studies have reported benefit, but trial findings differ. A dose used in a research study is not a recommendation to start treatment yourself. [2]
A 2020 systematic review did not find a significant improvement in muscle pain or continued statin use with CoQ10 compared with placebo. [2]
NICE advises against offering CoQ10 or vitamin D to improve adherence to statin treatment. Treating a separately identified vitamin deficiency is a different clinical decision. [1]
How I use this information in practice
A clinical review should consider: [1]
Check symptom pattern carefully – generalised aches, fatigue, exercise intolerance, sleep, mood and co-existing conditions such as hypothyroidism or low iron.
Other plausible causes of symptoms, including thyroid disease, unusual exertion or interacting medicines; tests depend on the history. [1]
The prescribing clinician can review the statin regimen and appropriate alternatives if symptoms are troublesome. CoQ10 is not a routine substitute for that review. [1]
Do not stop or change a prescribed statin, or start a supplement to manage suspected adverse effects, without discussing the plan with the prescriber or pharmacist. [1]
Vitamin D – low levels, muscle pain and statins
Vitamin D’s role in muscle and metabolic health
Vitamin D receptors sit in muscle cells, immune cells, pancreatic beta cells and many other tissues. Low 25-hydroxyvitamin D links with:
Myopathy and muscle weakness
Fracture risk and low bone mineral density
Higher cardiometabolic risk in observational cohorts
In the UK, vitamin D deficiency is extremely common through autumn and winter. National guidance suggests supplements for many adults, especially between October and March.
Low vitamin D and statin-associated muscle symptoms
Several studies connect low vitamin D status with statin muscle problems:
Observational associations between vitamin D levels and muscle symptoms cannot establish that vitamin D prevents statin side effects. [1]
Improvement after vitamin D treatment in an uncontrolled series can have other explanations. It is not proof that everyone with muscle symptoms needs vitamin D. [1]
A deficiency may need treatment for its own health effects. This is separate from claiming that supplementation will make a statin better tolerated. [1]
Do statins lower vitamin D levels?
This is where nuance matters. Mechanistic worries once suggested that blocking cholesterol synthesis could worsen vitamin D status, since skin uses cholesterol precursors to make vitamin D3. Newer research paints a different picture:
Several trials and reviews report higher 25-hydroxyvitamin D levels in patients on statins, possibly through improved absorption or reduced catabolism via CYP3A4.
Do not infer a vitamin D deficiency from statin use alone. Assess a suspected deficiency on its own clinical grounds. [1]
The timing of symptoms is useful information, but symptoms arising after a statin starts do not prove a nutrient-depletion mechanism. [1]
How I handle vitamin D in statin users
Clinical decisions may include: [1]
Measure 25-hydroxyvitamin D as part of a broader work-up in symptomatic patients or those with high risk of deficiency (limited sun exposure, darker skin, older age, higher BMI, malabsorption).
Bring levels into an evidence-based target range with oral vitamin D3, following UK guidance on dosing and safety
Re-evaluate muscle symptoms once vitamin D status has improved, in collaboration with the prescribing GP or cardiologist.
Vitamin K2 and vitamin-K–dependent proteins
Why K2 matters for arteries and bones
Vitamin K activates several Gla-proteins, including:
Matrix Gla Protein (MGP) – inhibits vascular calcification
Osteocalcin – links bone mineralisation with calcium handling
These proteins have biological roles, but this does not establish that K2 supplements prevent cardiovascular events or treat an adverse effect of statins. [1]
Statins and vitamin K biology
Several mechanistic and clinical papers suggest an interaction between statins and vitamin-K–related pathways:
A published hypothesis linked effects on vitamin K and selenium pathways with calcification and heart failure. A proposed mechanism does not establish that statins cause those outcomes in patients. [1]
Research on calcification must be interpreted alongside clinical outcomes. It does not overturn the evidence used in guidelines to recommend statins for appropriate patients. [1]
Industry-sponsored work with menaquinone-7 (MK-7) highlighted interference of statins with vitamin K2’s cardio-protective actions, although these findings sit in early phases and need independent replication.
Not all analyses agree. One recent technical review argued that statins do not directly block conversion of vitamin K3 to K2, and that the main effects might run through adjacent pathways rather than absolute K2 depletion.
How I translate this into clinical care
Vitamin K2 depletion is not an established reason to routinely supplement people taking statins. Decisions should follow the clinical question and the person’s medicines. [1]
Cardiovascular risk assessment can include lipids, diabetes risk, kidney function and family history. Imaging is not an automatic test for suspected statin-related nutrient depletion. [1]
Encourage K-rich foods: leafy greens (vitamin K1) and fermented foods or certain cheeses that contain K2.
Vitamin K can interact with warfarin. Do not add K2 or make a major change in vitamin K intake without advice from the anticoagulation team. [3]
Selenium and mitochondrial antioxidant defence
Selenium forms the active centre of several antioxidant enzymes, most notably glutathione peroxidases and thioredoxin reductases. These protect mitochondrial membranes and cardiomyocytes from oxidative stress.
A widely discussed paper by Okuyama and others argued that statins impair the synthesis of selenoproteins and CoQ10 together, proposing that this pattern contributes to heart failure and skeletal muscle problems.
Large clinical outcome evidence has not established routine selenium supplementation as a way to prevent statin side effects. Dietary or deficiency concerns need their own assessment. [1]
Dietary selenium intake (Brazil nuts, seafood, eggs)
Non-specific symptoms such as poor recovery do not diagnose selenium deficiency. [4]
Where deficiency is suspected, assess the cause and appropriate treatment. Too much selenium can be harmful; do not use high-dose supplements to offset a presumed statin effect. [4]
Other nutrients and metabolites often discussed
A few other molecules sit in the “statins and nutrients” conversation, though evidence is more speculative.
Carnitine and fatty-acid handling
L-carnitine shuttles long-chain fatty acids into mitochondria. Some functional medicine sources suggest that statins disturb carnitine metabolism and long-chain fatty acid oxidation, yet solid human data here remains limited. No major cardiology or lipid guidelines currently recommend routine carnitine testing or supplementation purely for statin users.
Heme A and respiratory chain complexes
The mevalonate pathway supports synthesis of heme A, a component of complex IV (cytochrome c oxidase). Experimental work indicates that statins disturb mitochondrial complexes, although this sits mainly in mechanistic studies rather than patient-level trial
Regular sleep, suitable activity, a balanced diet and a medicines review can support general health. They should not be described as a proven treatment for a specific mitochondrial defect without a diagnosis. [1]
How I assess nutrient status in patients who take statins
When someone on a statin comes to see me, the first step is a detailed story rather than a supplement list. I want to know:
Exact statin drug, dose and schedule, including changes over time
Cardiovascular risk profile and indications based on NICE guidance (primary or secondary prevention, familial hypercholesterolaemia, diabetes, etc.)
Muscle symptoms: location, timing, relation to exercise, past injuries, thyroid or rheumatological diagnoses
Energy levels, sleep, mood, cognitive changes
Diet pattern, alcohol intake, weight history, physical activity
Core investigations
Testing should answer a defined clinical question. The following examples are not a routine panel for everyone taking a statin: [1]
Lipid profile – total cholesterol, HDL, triglycerides, non-HDL, ApoB where accessible
Glucose metabolism – fasting glucose, HbA1c, insulin where suitable
Inflammation markers – hs-CRP, fibrinogen in selected cases
Thyroid profile, full blood count, iron status
25-hydroxyvitamin D – especially in those with muscle pain, low sun exposure or higher risk groups
Creatine kinase is considered when muscle symptoms occur, not routinely in people without symptoms. Liver tests follow the prescribing and monitoring plan. [1]
CoQ10 testing is not a routine guideline-recommended investigation for everyone taking a statin. A result does not reliably establish the cause of muscle symptoms or a need for supplementation. [1]
Food-first strategies while you stay on statins
Supplements sit on top of diet, not the other way round. For people on statins I usually aim for a Mediterranean-style pattern rich in:
CoQ10-rich foods
Organ meats (heart, liver), oily fish (sardines, mackerel), beef, soy, peanuts.
Vitamin D sources
Oily fish, eggs, fortified foods, and sensible sun exposure according to skin type and season.
Vitamin K2 foods
Fermented foods such as natto (where culturally acceptable), certain aged cheeses, and some fermented vegetables.
Selenium sources
Brazil nuts, seafood, eggs, whole grains.
Magnesium and B-vitamin-dense foods
Green leafy vegetables, legumes, nuts, seeds, whole grains, which support energy production and nerve function.
Alongside this, I work on protein intake, glycaemic control, fibre, and alcohol moderation, all of which influence both cardiovascular risk and subjective energy.
When supplements enter the plan
CoQ10
Persistent muscle symptoms need review with the prescribing clinician. CoQ10 is not recommended by NICE to improve statin adherence, and benefit for symptoms remains uncertain. [1]
Points to discuss include: [1]
Research products and doses vary. This article does not provide a CoQ10 dosing regimen. [2]
Evidence for symptom relief is mixed, so I set clear expectations and time-frames for reassessment
A supplement discussion must acknowledge the uncertain benefit, cost, possible interactions and the need to protect appropriate cardiovascular treatment. [2]
Vitamin D
For a separately identified vitamin D problem, clinical care can include: [1]
Target 25-hydroxyvitamin D levels in the sufficient range.
Use daily or weekly supplements, adjusting for body weight, malabsorption and co-existing conditions.
Re-test after several months, especially in patients with SAMS or bone health concerns
Vitamin K2 and selenium
A discussion of K2 and selenium should consider: [5]
Strengthen food sources first.
Supplementation is not an established routine response to statin use or vascular calcification. Check medicines and the indication; vitamin K affects warfarin, and excessive selenium can be toxic. [3]
How my clinic integrates medication and functional nutrition
Statins save lives when used in the right person, at the right dose, in the right context, in line with NICE and international cardiovascular guidelines.
My role as a functional and longevity doctor is to:
Keep that risk-reduction benefit in place where appropriate.
Map out nutrient status, mitochondrial health and lifestyle factors that influence how you feel on treatment.
Use dietary advice and any indicated supplements with realistic goals and an interaction check. [5]
A medicines review should involve the prescribing clinician. With the patient’s consent, relevant findings can be shared to support coordinated care. No service can guarantee that every interaction will be prevented. [1]
If muscle pain or fatigue develops during statin treatment, arrange a review of the symptoms, medicines and cardiovascular risk. Severe unexplained muscle pain or weakness, especially with dark urine, needs urgent medical advice. [6]