Rheumatoid Arthritis: An Integrative Rheumatology and Functional Medicine Approach
Medically reviewed by Dr Krushal Pabari, MD, PGCP - Rheumatic & Musculoskeletal Diseases · Last reviewed: 4 November 2026
Key facts
Rheumatoid arthritis is a long-term autoimmune condition in which the immune system attacks the lining of the joints, causing pain, swelling and stiffness, usually in the hands and feet. It affects about 0.46% of people worldwide [1]. Vitamin D deficiency is more common in people with RA, and lower levels go with more active disease [2]. We combine integrative rheumatology, functional medicine and functional nutrition, acupuncture and pain care and, where suitable, supervised vitamin D therapy (Coimbra Protocol), in coordination with your existing consulting physician, with regular blood tests.
Scientific explainer videos in our Resources section
In our Resources section, our clinical team discusses rheumatoid arthritis and its management in detail: functional nutrition, anti-inflammatory eating and, for some patients, supervised vitamin D therapy (Coimbra Protocol), alongside guideline medicines.
What is rheumatoid arthritis? Symptoms and early signs
In rheumatoid arthritis the immune system targets the synovium, the thin lining inside the joints. The lining becomes inflamed and thickened, and over time this can damage cartilage and bone. RA can also affect the eyes, lungs, heart and blood vessels, and it often brings tiredness.
Early signs:
- Morning stiffness lasting more than 30 minutes
- Swelling and tenderness in joints, especially the hands, wrists and knees
- The same joints affected on both sides of the body
- Tiredness, a mild fever or unintended weight loss
- In later stages, changes in joint shape and reduced movement
Early diagnosis and treatment protect the joints, so please see your doctor if you notice these signs.
Vitamin D and rheumatoid arthritis: what the research shows
- Low vitamin D is common in RA. Across 15 studies, 55% of people with RA were vitamin D deficient compared with 33% of people without RA, and the lower the level, the more active the disease tended to be [2].
- Vitamin D helps steer the immune system. It influences the immune cells and inflammatory signals involved in RA, which is why low levels matter [3].
- Trials of supplements disagree. In 6 randomized trials with 438 patients, vitamin D modestly improved the disease activity score (DAS28), the blood marker ESR and the number of tender joints [4]. Other reviews of 8 to 11 trials found mixed results, with no consistent effect on overall disease activity, although one found lower pain scores and one better daily function [15][16][17]. The 2022 American College of Rheumatology guideline advises a food-first approach for RA itself, while recognising the role of vitamin D for bone health [18].
- Diet matters too. In 7 trials, anti-inflammatory diets (such as Mediterranean-style eating) lowered RA pain compared with ordinary diets, although the studies were small [5].
Our article Vitamin D and rheumatoid arthritis: what the trials show explains each trial review, testing, bone health and safe use.
How much vitamin D is used for rheumatoid arthritis, and how it is monitored
There is no single right dose. Trials have used very different doses, and reviews disagree on whether the dose matters [4][16]. At Cure4Pain the dose is personalised, following the Coimbra Protocols: it is set and adjusted using your parathyroid hormone (PTH) level, with a low-calcium diet, at least 2.5 litres of fluid a day and cofactors such as magnesium [6]. We test vitamin D (25-OH D), PTH, calcium, kidney function and urine calcium before starting and at regular intervals. Please never take high doses on your own.
What is the conventional treatment for rheumatoid arthritis? Medicines as per guidelines
According to the 2025 EULAR update, treatment with disease-modifying antirheumatic drugs (DMARDs) starts with methotrexate, ideally with short-term steroids (glucocorticoids); leflunomide and sulfasalazine are the other conventional medicines [7].
- Treat to target: the 2025 EULAR update gives guidance on treating to target and on tapering after clinical remission [7]. Here remission is a defined measure of no active disease on a standard score, with medicines continued; it does not mean RA has gone away. The 2021 American College of Rheumatology (ACR) guideline strongly recommends treating to target, with low disease activity as a minimum first goal [8].
- First medicine: the ACR strongly recommends methotrexate over hydroxychloroquine or sulfasalazine for moderate to high disease activity, and suggests hydroxychloroquine first when activity is low [8]. EULAR names leflunomide and sulfasalazine as the other conventional medicines [7].
- Steroids (glucocorticoids): EULAR advises short-term use with methotrexate at the start of treatment [7]. The ACR advises the lowest effective dose for the shortest time and recommends against use for 3 months or longer [8].
- Response not enough after 3 to 6 months: EULAR advises adding a biological medicine (adalimumab, certolizumab pegol, etanercept, golimumab, infliximab, abatacept, rituximab, tocilizumab or sarilumab); JAK inhibitors (tofacitinib, baricitinib, filgotinib, upadacitinib) may also be considered after weighing their risks [7].
- JAK inhibitor caution: EULAR asks doctors to weigh the risks of major heart events, cancers and blood clots [7]. In the ORAL Surveillance trial of 4,362 people aged 50 or over with active RA despite methotrexate and at least one extra heart risk factor, heart events and cancers were more frequent with tofacitinib than with a TNF inhibitor [9].
- Tapering: in sustained remission, EULAR says DMARDs may be tapered, but with caution, because stopping often leads to a flare [7]. The ACR suggests tapering only after at least 6 months at target [8].
- Before biological medicines or JAK inhibitors: EULAR advises screening for latent tuberculosis and checking hepatitis B status [10]; in India, the INASL guideline also advises hepatitis B risk checks [11]. EULAR advises vaccinating before immune-suppressing treatment starts [12].
- Pregnancy: the 2024 EULAR recommendations advise stopping methotrexate and leflunomide before a planned pregnancy and avoiding JAK inhibitors; hydroxychloroquine and sulfasalazine are compatible, and TNF inhibitors can be used after an individual risk assessment [13][14].
| Medicine group | Generic examples |
|---|---|
| Conventional DMARDs (first step) | methotrexate, leflunomide, sulfasalazine, hydroxychloroquine |
| TNF inhibitors (next step) | adalimumab, certolizumab pegol, etanercept, golimumab, infliximab, biosimilars |
| Other biological medicines (next step) | abatacept, tocilizumab, sarilumab, rituximab |
| JAK inhibitors (next step, risks weighed) | tofacitinib, baricitinib, filgotinib, upadacitinib |
At Cure4Pain, Dr Krushal Pabari prescribes and adjusts these medicines as per guidelines, under clinical guidance from Team Cure4Pain, in coordination with your existing consulting physician, alongside supervised vitamin D therapy (Coimbra Protocol) and the integrative plan; never stop or change them on your own.
These medicines need regular blood tests because of possible effects on the liver, blood counts and infection risk. Integrative care adds what they are not designed to address: vitamin D and other nutrient levels, gut health, diet, sleep, stress and metabolic health.
Our integrative approach: vitamin D, nutrition, gut health and infections
- Orthomolecular medicine: vitamin D (Coimbra Protocols), magnesium, zinc, selenium and omega-3, iron when tests show it is low, and vitamin K2 and boron for calcium balance.
- Functional medicine: liver and kidney support, gallbladder and bile-acid support for digestion, and thyroid support when tests show it is needed.
- Infections and gut health: what we may check. Some people with RA have infections or gut problems that add to inflammation or digestive symptoms. Depending on your history, we may check: blood count with eosinophils, stool tests, ASO titre, EBV and CMV antibodies, H. pylori, Candida markers, Yersinia antibodies, and CRP, ESR and procalcitonin. These tests look for problems that can add to inflammation; they are not proof that an infection causes RA. A 4 to 6 week gut-support plan, including targeted antimicrobial support, is used only when tests show it is needed.
- Pain and mobility support: acupuncture and myofascial release, breathing retraining (Buteyko, Naad Yoga) for stress and breathing patterns, and postural rehabilitation to strengthen the muscles around the joints.
One of the therapies we use is the Coimbra Protocol (supervised vitamin D therapy): read how it works, who it may suit and how it is monitored.
Diet for rheumatoid arthritis
Anti-inflammatory eating has the best evidence: plenty of vegetables, fruit, legumes, whole grains such as millets, nuts and seeds, fish or other omega-3 sources, and olive or cold-pressed oils, with fewer ultra-processed foods, refined sugar and fried foods [5]. During supervised vitamin D therapy (Coimbra Protocol) we also limit calcium-rich foods. Your plan is personalised to your tests, weight and blood sugar.
What to expect
Your first consultation reviews your history, medicines and blood tests. We then agree a plan and a monitoring schedule. Some people notice changes in stiffness and energy within weeks; for others it takes months, and some respond less. We review your symptoms and blood tests at each follow-up and share findings with your existing consulting physician. Individual results vary.
De-identified patient cases
Educational case examples, shared with patient consent. Results vary and are not typical. Do not change any medicine without medical guidance.
Case 1: Rheumatoid arthritis with iron deficiency (female, 42)
| Visit | RA factor | Vitamin D (ng/mL) | B12 (pg/mL) | PTH (pg/mL) | Serum iron | Ferritin | Ionised Ca | ESR | eGFR / creatinine |
|---|---|---|---|---|---|---|---|---|---|
| Baseline | 86 | 12 | 129 | 120 | 27 | 6 | – | – | – |
| Month 3 | 54 | 73 | 932 | 78 | 46 | 37 | 1.02 | 23 | 102.3 / 0.72 |
| Month 7 | <12 | 112.8 | 756 | 72 | 57 | 52 | 1.03 | – | 104.2 / 0.74 |
Read the details of case 1
This patient presented at Cure4Pain, with rheumatoid arthritis, iron deficiency anemia, and elevated ASO titre. She was using prescribed RA medicines and pain-relief medicines but continued to experience stiffness, fatigue, and daily discomfort.
Baseline blood work included:
- RA Factor: 86
- Vitamin D: 12 ng/mL (low)
- Vitamin B12: 129 pg/mL (low)
- PTH (Intact): 120 pg/mL (elevated)
- Serum Iron: 27 µg/dL, Ferritin: 6 ng/mL (low)
We initiated supervised vitamin D therapy (Coimbra Protocol) with nutrient cofactors (Magnesium, B-complex, a mineral blend, Omega-3), iron support, and gut health protocols.
Clinical Progression
- Day 25: she reported needing less pain relief.
- Month 3:
- RA factor: 86 to 54
- Vitamin D: 73 ng/mL
- Ferritin: 37 ng/mL
- Patient reported significant symptom improvement, reduced stiffness, and improved energy
- Month 7:
- RA factor: <12
- Vitamin D: 112 ng/mL, PTH: 72
- Ferritin: 52 ng/mL
- She reported continued improvement, no flare was recorded during follow-up, and medicine changes were made under clinical guidance from Team Cure4Pain, in coordination with her existing consulting physician.
Observation
Over 7 months, she reported less stiffness and more energy, and her nutrient levels rose in the tests shown.
Individual results vary; further studies are needed. Do not change any medicine without medical guidance.
Case 2: Rheumatoid arthritis after gallbladder removal, with H. pylori (male, 50)
| Visit | RA factor | Vitamin D (ng/mL) | B12 (pg/mL) | PTH (pg/mL) | Triglycerides | HbA1c | Ionised Ca | ESR | eGFR / creatinine |
|---|---|---|---|---|---|---|---|---|---|
| Baseline | 32 | 38 | 459 | 96 | 326 | 6.9 | – | – | – |
| Month 3.5 | <8 | 68 | 566 | 69 | 220 | 6.4 | 1.10 | – | – |
| Month 10 | <5 | 98 | 688 | 41 | 156 | 6.0 | 1.07 | 12 | 111 / 0.83 |
Read the details of case 2
This patient presented at Cure4Pain, with rheumatoid arthritis, a history of gallbladder removal, chronic hyperacidity (6+ years), and H. pylori infection. Symptoms included severe knee and elbow pain, morning stiffness, wrist/finger discomfort, constipation, and chronic insomnia.
Baseline blood work included:
- RA Factor: 32
- Vitamin D: 38 ng/mL (insufficient)
- Vitamin B12: 459 pg/mL (borderline)
- PTH (Intact): 96 pg/mL (elevated)
- Triglycerides: 326 mg/dL (high)
- HbA1c: 6.9 (elevated)
We initiated two-part functional and nutritional support:
- Monitored Vitamin D therapy with cofactors (Magnesium, B-complex, a mineral blend, Omega-3), liver and digestive support, lipid balance, and metabolic support.
- Targeted gut health protocol: structured antimicrobial support and probiotics to address infections and restore gut balance.
Clinical Progression
- Day 20: he reported less acidity, constipation and stiffness, and better sleep.
- Month 3.5:
- RA Factor: 32 to <8
- Vitamin D: 68 ng/mL, PTH: 69
- Triglycerides: 326 to 220
- HbA1c: 6.9 to 6.4
- He reported a large improvement in symptoms; any change to his medicines was made under clinical guidance from Team Cure4Pain, in coordination with his existing consulting physician.
- Month 10:
- RA Factor: <5
- ESR: 12 (normal)
- Vitamin D: 98 ng/mL, PTH: 41
- Triglycerides: 156, HbA1c: 6.0
- Patient reported sustained symptom improvement, resumed swimming, badminton, and travel
Observation
Over 10 months, he reported less pain and better daily function, and his triglycerides and HbA1c fell in the tests shown.
Individual results vary; further studies are needed. Do not change any medicine without medical guidance.
Case 3: Rheumatoid arthritis after pregnancy (female, 37)
| Visit | RA factor | Vitamin D (ng/mL) | B12 (pg/mL) | PTH (pg/mL) | Serum iron | Hb (g/dL) | ESR | Eosinophils (%) | Ionised Ca |
|---|---|---|---|---|---|---|---|---|---|
| Baseline | 28 | 16 | 347 | 76 | 44 | 11.0 | 23 | 11 | 0.90 |
| Month 4 | – | 94 | 756 | 31 | 57 | 11.5 | 6 | 3 | 1.03 |
Read the details of case 3
This patient presented at Cure4Pain, with rheumatoid arthritis symptoms following pregnancy, including severe joint pain, chronic fatigue, mood changes, muscle spasms, irregular periods, and recurrent headaches. Blood work showed eosinophilia and Epstein-Barr Virus (EBV) markers, possible immune contributors.
Baseline blood work included:
- RA Factor: 28
- Vitamin D: 16 ng/mL (low)
- Vitamin B12: 347 pg/mL (borderline)
- PTH (Intact): 76 pg/mL (elevated)
- Serum Iron: 44 µg/dL
- Haemoglobin: 11 g/dL (mild anaemia)
- Eosinophils: 11% (high)
- ESR: 23
- Ionised Calcium: 0.90 mmol/L (low)
We initiated a two-part functional and nutritional support:
- Monitored Vitamin D therapy with cofactors (Magnesium, B-complex, a mineral blend, Omega-3), liver and digestive support, and neurological balance protocols.
- Targeted gut health protocol: structured antimicrobial support and probiotics to address infections and restore gut balance.
Clinical Progression
- Day 25: she reported less pain, fatigue, mood changes, menstrual discomfort and headaches.
- Month 4:
- ESR: 23 to 6
- Vitamin D: 16 to 94 ng/mL
- PTH: 76 to 31 pg/mL
- B12: 347 to 756 pg/mL
- Eosinophils: 11 to 3
- Ionised Calcium: 0.90 to 1.03 mmol/L
- Patient reported sustained symptom improvement and moved to a maintenance plan
Observation
Over 4 months, she reported less pain and more energy, and her lab values changed as shown.
Individual results vary; further studies are needed. Do not change any medicine without medical guidance.
Evidence: key studies
| Study | What it found |
|---|---|
| Almutairi et al., Rheumatol Int 2021 [1] | RA affects about 0.46% of people worldwide. |
| Lee & Bae, Clin Exp Rheumatol 2016 [2] | Vitamin D deficiency in 55% of people with RA vs 33% without; lower levels with higher disease activity. |
| Guan et al., Front Med 2020 [4] | 6 trials: vitamin D improved DAS28, ESR and tender joints. |
| Al-Saoodi et al., Nutr Rev 2024 [16] | 11 trials: no significant change in DAS28, CRP or ESR overall; lower pain scores. |
| Schönenberger et al., Nutrients 2021 [5] | Anti-inflammatory diets lowered RA pain in 7 small trials. |
| Amon et al., Nutrients 2022 [6] | Safety data for the Coimbra Protocol in 319 autoimmune patients under supervision. |
RA FAQs
Does vitamin D help rheumatoid arthritis?
Trials disagree: one review found a modest improvement in disease activity [4], while other reviews found no consistent effect on overall disease activity [15][16][17]. Correcting a deficiency is still reasonable, especially for bones [15][18]. It works best as part of a monitored plan in coordination with your existing consulting physician, not as a replacement for your treatment.
How much vitamin D should I take for rheumatoid arthritis?
It depends on your blood tests. Trials have used very different doses, and reviews disagree on whether the dose matters [4][16]; in the Coimbra Protocols the dose is personalised using PTH and monitored for calcium and kidney safety [6]. Please do not take high doses without medical supervision.
Is vitamin D deficiency linked to rheumatoid arthritis?
Yes. Deficiency is more common in RA, and lower levels go with more active disease [2]. A simple blood test (25-hydroxy vitamin D) shows your level.
What is a good diet for rheumatoid arthritis?
Anti-inflammatory, Mediterranean-style eating has the best evidence for less pain [5]: vegetables, fruit, legumes, millets and whole grains, nuts, omega-3 sources and good oils, with fewer processed foods and sugar.
Can I take vitamin D with methotrexate or my other RA medicines?
Vitamin D is commonly used alongside RA medicines. We review all your medicines before starting, and we share our plan with your existing consulting physician. Keep taking folic acid and any other medicines exactly as prescribed.
Will I have to stop my RA medicines?
No. Our care is added to your current treatment. Any change to your medicines is made under clinical guidance from Team Cure4Pain, never on your own.
How much does a consultation cost?
The consultation fee is shown when you book. Blood tests can be done at a laboratory near you. Supplements can be bought from a source of your choice, as long as the quality and dose are approved during your consultation; typical monthly costs are discussed in your first consultation.
Can I consult online from outside India?
Yes. We see patients worldwide online. Blood tests are done near you and reviewed with you in the consultation.
Who treats you
- Dr Krushal PabariMD, PGCP - Rheumatic & Musculoskeletal Diseases. Assistant Professor, Cooper Hospital; Guest Professor, CMP Homoeopathic Medical College.
- AT. Chintan Dalal, N.D.BNYS, R.AP. Functional nutrition and Coimbra Protocol practitioner.
How consultations work: Mumbai or online worldwide
Book through our patient portal. You can see us in person at our clinic in Malad West, Mumbai, or online from anywhere. Your first consultation reviews your history and tests; we then agree a plan together and set the monitoring schedule.
Related conditions and articles
- PsoriasisScaly, inflamed skin patches; vitamin D, nutrition and patient cases.
- FibromyalgiaWidespread pain and fatigue; nutrients, sleep and pain care.
- Ankylosing SpondylitisInflammatory back pain and stiffness, often with HLA-B27.
- Lupus (SLE)A whole-body autoimmune condition; vitamin D, magnesium and monitoring.
This page is for education and does not replace medical advice. Do not start, stop or change any medicine or supplement without medical guidance.
References
1. Almutairi K, et al. The global prevalence of rheumatoid arthritis: a meta-analysis based on a systematic review. Rheumatol Int 2021;41(5):863-877. doi:10.1007/s00296-020-04731-0
2. Lee YH, Bae SC. Vitamin D level in rheumatoid arthritis and its correlation with the disease activity: a meta-analysis. Clin Exp Rheumatol 2016;34(5):827-833. PMID 27049238
3. Athanassiou L, et al. Vitamin D and autoimmune rheumatic diseases. Biomolecules 2023;13(4):709. doi:10.3390/biom13040709
4. Guan Y, et al. The effect of vitamin D supplementation on rheumatoid arthritis patients: a systematic review and meta-analysis. Front Med 2020;7:596007. doi:10.3389/fmed.2020.596007
5. Schönenberger KA, et al. Effect of anti-inflammatory diets on pain in rheumatoid arthritis: a systematic review and meta-analysis. Nutrients 2021;13(12):4221. doi:10.3390/nu13124221
6. Amon U, et al. Safety data in patients with autoimmune diseases during treatment with high doses of vitamin D3 according to the “Coimbra Protocol”. Nutrients 2022;14(8):1575. doi:10.3390/nu14081575
7. Smolen JS, et al. EULAR recommendations for the management of rheumatoid arthritis with synthetic and biologic disease-modifying antirheumatic drugs: 2025 update. Ann Rheum Dis 2026;85(6):991-1009. doi:10.1016/j.ard.2026.01.023
8. Fraenkel L, et al. 2021 American College of Rheumatology guideline for the treatment of rheumatoid arthritis. Arthritis Care Res 2021;73(7):924-939. doi:10.1002/acr.24596
9. Ytterberg SR, et al. Cardiovascular and cancer risk with tofacitinib in rheumatoid arthritis. N Engl J Med 2022;386(4):316-326. doi:10.1056/NEJMoa2109927
10. Fragoulis GE, et al. 2022 EULAR recommendations for screening and prophylaxis of chronic and opportunistic infections in adults with autoimmune inflammatory rheumatic diseases. Ann Rheum Dis 2023;82(6):742-753. doi:10.1136/ard-2022-223335
11. Arora A, et al. INASL guidelines on management of hepatitis B virus infection in patients receiving chemotherapy, biologicals, immunosuppressants, or corticosteroids. J Clin Exp Hepatol 2018;8(4):403-431. doi:10.1016/j.jceh.2018.06.010
12. Furer V, et al. 2019 update of EULAR recommendations for vaccination in adult patients with autoimmune inflammatory rheumatic diseases. Ann Rheum Dis 2020;79(1):39-52. doi:10.1136/annrheumdis-2019-215882
13. Rüegg L, et al. EULAR recommendations for use of antirheumatic drugs in reproduction, pregnancy, and lactation: 2024 update. Ann Rheum Dis 2025;84(6):910-926. doi:10.1016/j.ard.2025.02.023
14. Meißner Y, Förger F. Overview of the 2024 EULAR recommendations on antirheumatic therapy in reproduction, pregnancy and lactation (in German). Z Rheumatol 2025;84(10):843-849. doi:10.1007/s00393-025-01727-8
15. Nguyen Y, et al. Efficacy of oral vitamin supplementation in inflammatory rheumatic disorders: a systematic review and meta-analysis of randomized controlled trials. Nutrients 2020;13(1):107. doi:10.3390/nu13010107
16. Al-Saoodi H, et al. Effect of vitamin D on inflammatory and clinical outcomes in patients with rheumatoid arthritis: a systematic review and dose-response meta-analysis of randomized controlled trials. Nutr Rev 2024;82(5):600-611. doi:10.1093/nutrit/nuad083
17. Xu B, et al. Evaluation of the clinical outcomes associated with the use of fatty acids and vitamin D in rheumatoid arthritis patients: a systematic review and meta-analysis. Food Sci Nutr 2025;13(7):e70473. doi:10.1002/fsn3.70473
18. England BR, et al. 2022 American College of Rheumatology guideline for exercise, rehabilitation, diet, and additional integrative interventions for rheumatoid arthritis. Arthritis Care Res 2023;75(8):1603-1615. doi:10.1002/acr.25117