SYMPTOMS
Joint aches or stiffness
Everyday reasons for joint aches, what to ask your doctor to check, and which nutrients have been studied.
Also described as: joint, joints, arthritis, stiff, stiffness, knee pain, achy, aches, sore muscles, muscle ache
Common everyday causes
Joint wear (cartilage)
Wear-and-tear (osteoarthritis) aches with use and eases with rest; morning stiffness is short. It’s the commonest joint ache after 45. No blood test; a doctor’s exam (and sometimes an X-ray) confirms it.
Low-grade inflammation
Ongoing low-grade inflammation makes joints ache and can drain energy and mood. Weight, smoking, poor sleep and low omega-3 intake feed it. Ask for an hs-CRP test.
Low omega-3
Omega-3 fats (EPA/DHA) calm inflammation and support brain, skin and joints. Most people who rarely eat oily fish run low. Ask for an omega-3 index test (a finger-prick test works).
Low vitamin D
Vitamin D supports muscles, bones, mood and immune defenses. Low levels are very common, especially in winter, with darker skin or little sun. Ask for a 25-hydroxy vitamin D test.
Hormone shifts of perimenopause and menopause
Falling and swinging estrogen drives hot flashes, night waking, mood changes and lower libido, usually from the early 40s. Diagnosis is by symptoms and cycle changes; hormone tests swing too much to rely on. Ask your doctor about hormone therapy or non-hormonal options.
An autoimmune or inflammatory-arthritis process
Long morning stiffness (over 30–60 minutes) and swollen joints point to the immune system attacking tissue — this needs a doctor, ideally early. See your doctor; they may test CRP, ESR, rheumatoid factor/anti-CCP or ANA.
If you take certain medicines
Statin lowering CoQ10
Statins block the same pathway the body uses to make CoQ10, an energy molecule in muscle cells. Muscle aches and tiredness are the most common statin complaints. Tell your prescriber about muscle symptoms; they may check CK. There’s no routine CoQ10 test.
What’s been studied
- Turmeric
For joint wear.
- Vitamin K2
For low vitamin D.
- Vitamin E
For menopause transition.
- Magnesium
For menopause transition.
- Glycine
For menopause transition.
- Vitamin D3
For low vitamin D.
- Omega-3
For inflammation.
- Algae omega-3
For inflammation.
- CoQ10
For statin & CoQ10.
When to see a doctor first
- Chest pain, fainting or getting short of breath need a doctor today; call 911 if it’s happening now.
- Blood in stool, urine or vomit (or black stools) needs a doctor visit soon.
- Losing weight without trying should be checked by a doctor before anything else.
- Fevers or drenching night sweats need a doctor visit to find the cause.
- A hot, red or swollen joint needs a doctor soon (it can be gout, infection or inflammatory arthritis).
- New muscle weakness or dark urine on a statin needs your doctor today (they’ll check CK).
From the Journal
- Magnesium glycinate vs citrate vs oxide: which form should you take?
Glycinate, citrate, oxide, malate, threonate and taurate compared on magnesium content, absorption, gut comfort and capsule space, plus the 350 mg supplement limit and medicine timing.
- How much creatine should you take a day, and is it safe?
Creatine dosing made simple: 3 g vs 5 g a day, why loading is optional, what the brain research does and doesn't show, the creatinine lab quirk, and who should check first.
apiece asks a few quick questions about joint aches in its quiz to tell these causes apart, and suggests only ingredients studied for the likely ones.
Questions
What can cause joint aches?
Common everyday reasons include joint wear, inflammation, low omega-3, low vitamin D, menopause transition. A doctor can help find which applies to you.
What tests can help explain joint aches?
Ask your doctor about: No blood test; a doctor’s exam (and sometimes an X-ray) confirms it; an hs-CRP test; an omega-3 index test (a finger-prick test works); a 25-hydroxy vitamin D test; Diagnosis is by symptoms and cycle changes; hormone tests swing too much to rely on. Ask your doctor about hormone therapy or non-hormonal options; See your doctor; they may test CRP, ESR, rheumatoid factor/anti-CCP or ANA.
Which supplements are studied for joint aches?
Depending on the cause: Turmeric, Vitamin K2, Vitamin E, Magnesium, Glycine, Vitamin D3, Omega-3, Algae omega-3, CoQ10. Some only make sense with a lab result (for example iron only when ferritin is low).*
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.