Turmeric for Lupus (SLE)

The best-known trial gave 24 people with relapsing or refractory lupus nephritis (lupus affecting the kidneys) either turmeric capsules or placebo for 3 months. Protein in the urine fell within the first month in the turmeric group and was about a quarter of its starting level by months 2-3, along with blood in the urine and systolic blood pressure, while the placebo group did not change significantly [1]. A later 10-week trial in 62 adults with lupus found 1,000 mg a day of curcumin lowered anti-dsDNA antibodies and the inflammatory signal IL-6 more than placebo [2].

That is where the good news stops. A systematic review of the human trials found no change in SLEDAI disease-activity scores, complement C3 or dsDNA [5], a 2025 meta-analysis found no significant effect on inflammatory markers across lupus and rheumatoid arthritis [6], and a trial of Javanese turmeric, a related but different plant, was null [4]. Turmeric products also carry a small risk of serious liver injury [12]. If you try it, it is an add-on to prescribed treatment, not a replacement.

Curcumin blocks inflammatory switches such as NF-κB and lowers TNF-α, IL-1 and IL-6 in laboratory studies. In lupus-prone mice it reduced dsDNA antibodies, proteinuria and kidney inflammation, and lowered BAFF (a B-cell survival signal) and Th17 cells [5]. Earlier experiments also suggested curcumin weakens the binding of lupus autoantibodies to their targets [1].

In immune cells taken from 20 people with lupus nephritis, curcumin suppressed PYK2, a signalling protein involved in lymphocyte activation, along with the co-stimulatory molecules CD40L and CTLA-4 and cell proliferation. These effects were not seen in cells from healthy people [8].

Most mouse studies used 12.5-200 mg/kg a day of curcumin for 16 weeks or more, generally higher and longer than the human trials [5]. Curcumin is also poorly absorbed: after 2 g of curcumin alone, blood levels in volunteers were undetectable or very low, and adding 20 mg of piperine from black pepper raised absorption about 20-fold [9].

Cell and mouse results show curcumin can affect lupus pathways, not that a capsule does so in people. Only clinical trials can answer that, and so far they are small and short.

The nephritis trial used capsules of 500 mg whole turmeric, each containing 22.1 mg curcumin, taken three times a day with meals for 3 months: 1.5 g turmeric and about 66 mg curcumin a day [1]. The curcumin trials used much more curcumin: 1,000 mg a day for 10 weeks [2], or 600 mg once a day with piperine for 3 months [3].

NCCIH considers conventional turmeric or curcumin, not modified for higher absorption, likely safe in recommended amounts for 2-3 months [11]. That matches the length of the lupus trials; nothing is known about longer use in lupus. Turmeric used as a spice in food is a different, much smaller exposure.

In the 2012 Iranian trial, 24 people with biopsy-proven relapsing or refractory lupus nephritis were randomised to turmeric or identical starch capsules for 3 months. Average proteinuria in the turmeric group fell from 954.2 at baseline to 448.8, 235.9 and 260.9 at months 1, 2 and 3 (units are not given in the abstract, and values varied widely between patients), and haematuria and systolic blood pressure also fell. Placebo produced no significant change, and no adverse effects were attributed to turmeric [1].

The abstract reports changes within each group rather than a direct comparison between them, and 12 people per arm is very small. It has not been repeated in a larger trial.

In a triple-blind trial, 70 adults with SLE were randomised to 1,000 mg curcumin a day or placebo for 10 weeks, and 62 finished. Compared with placebo, curcumin lowered anti-dsDNA (change -9.30 vs -2.55, p = 0.018) and IL-6 (-25.62 vs -7.34, p = 0.043). C3, C4, ESR, CRP and TNF-α did not change, and the abstract reports no disease-activity score [2].

An Indonesian trial in 45 women compared vitamin D, curcumin with piperine, and both together for 3 months. All three groups improved on the Mex-SLEDAI activity score and fatigue, and the combination improved more than either alone (p = 0.003 and p = 0.008 for Mex-SLEDAI). Curcumin alone did about as well as vitamin D alone, but with no placebo-only arm, that improvement can't be separated from usual care [3]. See the vitamin D for lupus page for the vitamin D evidence.

Adding Javanese turmeric (Curcuma xanthorrhiza, a different plant) at 20 mg three times a day to vitamin D3 made no difference to SLEDAI, IL-6 or TGF-β1 in adults with active lupus and low vitamin D [4]. A 2023 systematic review found three small placebo-controlled trials (14 to 39 patients, 4 to 12 weeks): proteinuria fell, but C3, dsDNA and SLEDAI did not change [5].

A 2025 meta-analysis of seven trials (314 patients with rheumatoid arthritis or lupus) found no significant effect on ESR (SMD -1.49, 95% CI -3.71 to 0.72) or CRP (SMD -1.65, 95% CI -3.88 to 0.58), with very high heterogeneity [6]. An earlier review of 31 autoimmune-disease trials found only two in lupus, too few to pool [7].

No trial has lasted longer than about 3 months, enrolled more than 70 people, or measured flares, organ damage or steroid needs. The positive results are laboratory or urine markers, and the reviews call for long, large trials with defined doses before any dose can be advised [5].

For comparison, omega-3 for lupus has a larger, if still mixed, body of trials.

No adverse effects were attributed to turmeric in the nephritis trial [1]. Common side effects of oral turmeric are digestive: nausea, vomiting, acid reflux, stomach upset, diarrhoea or constipation. Turmeric supplements in pregnancy may be unsafe, and little is known about amounts above food levels while breastfeeding [11].

The serious risk is liver injury. The US Drug-Induced Liver Injury Network found 10 cases linked to turmeric, 9 of them hepatocellular, 5 people hospitalised and 1 death. Symptoms usually began 1 to 4 months after starting, and 7 of the 10 carried the HLA-B*35:01 gene variant [12]. Italian cases were tied to high-absorption, high-dose curcumin products, and in 23 published case reports most people were also taking at least one other medicine [13].

Curcumin can change blood levels of other drugs in laboratory and animal studies, including anticoagulants and cardiovascular drugs, by inhibiting CYP liver enzymes and the P-glycoprotein drug pump. Only one human trial has confirmed a significant interaction, so the advice is caution rather than a known danger [14].

For tacrolimus, the human data conflict: one liver-transplant patient's level rose to 29.9 ng/mL, with kidney injury, after high-dose turmeric in food [15], while 10 g a day of turmeric for 4 days did not change tacrolimus levels in a kidney-transplant patient [16]. Lupus treatment itself follows the EULAR recommendations: hydroxychloroquine for everyone with lupus, glucocorticoids as short-term bridging therapy during flares and cut to 5 mg a day or less (prednisone equivalent) for maintenance, and immunosuppressants or biologics as needed [10].