Maybe, but I also need to respond with a “nah”, haha. The LDL-C lowering aspect is very well proven to reduce cardiac events. It’s probably the strongest drug trial evidence that we have in the whole cardiovascular or longevity fields, period. So I agree that most people should take a statin, since CVD is the number one killer by far. However, any supposed pleiotropic effects are much less well demonstrated. Most of the claims have arisen from observational studies, correlations etc.
I did do some searching, and found some mixed results, which are mostly negative. And the better quality the study, the more likely it is to be negative.
Emerging views of statin pleiotropy and cholesterol lowering - PMC - nice review article here which takes a sceptical tone.
Evaluation of the Pleiotropic Effects of Statins: A Reanalysis of the Randomized Trial Evidence Using Egger Regression-Brief Report - PubMed - this study points out that cardiovascular benefits seem to be derived entirely from LDL-C lowering:
For cardiovascular end points, each 1 mmol/L change in LDL-C with statin therapy was associated with a hazard ratio of 0.77 (95% confidence interval, 0.71-0.84) with an intercept that was indistinguishable from zero (intercept, -0.0032; [95% confidence interval, -0.090 to 0.084]; P =0.94), indicating no pleiotropy."
However, there is definitely some statin benefit on venous thromboembolism (Rosuvastatin for the prevention of venous thromboembolism: a pooled analysis of the HOPE-3 and JUPITER randomized controlled trials - PubMed), but I don’t know whether we’d strictly call it “pleiotropic” since it’s probably related to lipoprotein lowering.
For cancer, If you look purely at observational results, they are very, very sexy and appealing:
Predicting the effect of statins on cancer risk using genetic variants from a Mendelian randomization study in the UK Biobank | eLife - this mendelian randomisation study found a strong link between HMGCR variants and cancer incidence, but not between other lipid-modulating genes:
Variants in the HMGCR gene region, which represent proxies for statin treatment, were associated with overall cancer risk (odds ratio [OR] per one standard deviation decrease in low-density lipoprotein [LDL] cholesterol 0.76, 95% confidence interval [CI] 0.65–0.88, p=0.0003) but variants in gene regions representing alternative lipid-lowering treatment targets (PCSK9 , LDLR , NPC1L1 , APOC3 , LPL ) were not.)
That’s fascinating, and there’s at least some plausible mechanism there.
Observational data are also outrageously sexy: (Effects of statins on cancer mortality and progression: A systematic review and meta-analysis of 95 cohorts including 1,111,407 individuals - PubMed)
A meta-analysis of 55 articles showed that statin use was significantly associated with decreased risk of all-cause mortality (HR 0.70, 95% Cl 0.66 to 0.74) compared with nonusers. The observed pooled estimates were retained for cancer-specific mortality (HR 0.60, 95% Cl 0.47 to 0.77), progression-free survival (HR 0.67, 95% Cl 0.56 to 0.81), recurrence-free survial (HR 0.74, 95% Cl 0.65 to 0.83) and disease-free survival (HR 0.53, 95% Cl 0.40 to 0.72).
Cancer-specific mortality of HR 0.6 in cancer patients is insane. However, when we see a result like that our first thought should be that it’s way too good to be true.
If we look at actual interventional trials, the results are much less positive, unfortunately. The association of statin therapy and cancer: a meta-analysis - PMC
“This meta-analysis comprised thirty-five randomized controlled studies. Twenty-eight included studies reported cancer incidence, and eighteen reported cancer mortality. The pooled results indicated no reduction in cancer incidence with statins compared to placebo [OR = 0.99, 95% CI (0.95, 1.03)]. In addition, statins did not decrease cancer mortality [OR = 0.99, 95% CI (0.91, 1.07)]. This study also performed a number of subgroup analyses, which showed no effect of statins on cancer subtypes such as genitourinary and breast cancer. Neither the type of statin nor long-term treatment with statins had an effect on cancer incidence and mortality.”
I think if there was an effect, it should be detectable in this sort of study.
There also a meta-analysis here of studies which used statins alongside conventional treatments for cancer, and found no significant effects: Statin therapy in the treatment of active cancer: A systematic review and meta-analysis of randomized controlled trials - PMC
The pooled HR for overall survival in patients randomized to statins plus standard anti-cancer therapy versus standard therapy alone was 0.94 (95% CI, 0.85 to 1.04). In the 9 studies that reported progression-free survival (1,798 participants), the pooled HR for statin plus standard therapy versus standard therapy alone was 0.97 (95% CI, 0.87 to 1.07).
So statins don’t seem to be useful as a treatment for cancer, at least.
For prevention, maybe there some signal, but it’s only weak, circumstantial evidence. Obviously there isn’t any sort of RCT where people are given statins solely for cancer prevention, but Claude (LLM) tells me that for all the major statin trials in CVD, they did actually use cancer as a secondary outcome, and all of them failed to show an association (either positive or negative). If you pool the data, that’s around 170,000 participants, across 27 full RCTs, and no association:
Lack of Effect of Lowering LDL Cholesterol on Cancer: Meta-Analysis of Individual Data from 175,000 People in 27 Randomised Trials of Statin Therapy - results are as negative as results can ever be:
Cancer incidence RR was 1.00 (95% CI 0.96–1.05) and cancer mortality RR 1.00 (95% CI 0.93–1.08); in the trials of more versus less statin, cancer incidence RR 1.00 (95% CI 0.93–1.07) and cancer mortality RR 0.93 (95% CI 0.82–1.06).
In 27 randomised trials, a median of five years of statin therapy had no effect on the incidence of, or mortality from, any type of cancer (or the aggregate of all cancer).
That analysis was 2012, and we haven’t done many statin trails since then, since giving people placebos is unethical nowadays after statins were proven so effective.
However, one newer trial (HOPE-3, Rosu 10mg vs placebo) came out in 2016, looking at younger (well, 55+) people without CVD. i.e. representing many people on this forum, I think. The trial showed a HR of 0.76 (95% CL = 0.64 to 0.91; P=0.002) for cardiovascular outcomes, which was statistically significant and no huge surprise. They also tracked cancer as a secondary outcome. If we use the numbers from the study and approximate the relative risks (which the authors didn’t do since this was only a secondary outcome), we get:
Cancer: Event rates: rosuvastatin 267/6,361 = 0.04197 (4.20%); placebo 286/6,344 = 0.04508 (4.51%). RR = RR ≈ 0.93 (95% CI 0.79–1.10)
So that’s a small reduction in the Rosu group, but negative overall. We can also look at total deaths:
Total deaths: rosuvastatin 334/6,361 = 0.05251 (5.25%); placebo 357/6,344 = 0.05627 (5.63%). RR ≈ 0.93 (95% CI 0.81–1.08)
Obviously in this younger-ish population the number of cancers and deaths is relatively small. But there’s still no clear cancer-preventing effect here. For CVD outcomes, there were 650 total events, and a big advantage to the Rosuvastatin group (281 + 369). But for cancer incidence there were 553 total events and no advantage to Rosu (267 vs 286). That looks like a very strong sign that there is no prevention benefit, at least in the time frame of this sort of study.
If we really want wiggle room, we could claim that 5.6 years is too short to see an anti-cancer effect, and that’s possible, but it’s clutching at straws IMO.
If there’s some strong evidence out there which I’ve missed, please do share and I’m happy to change my mind.
For rheumatoid arthritis, I assume you meant this study: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(04)16449-0/abstract
These data show that statins can mediate modest but clinically apparent anti-inflammatory effects with modification of vascular risk factors in the context of high-grade autoimmune inflammation.
But it’s a small study, only 116 people, for 6 months. They saw changes in some biomarkers and disease scores, not the actual disease progression. And those numbers pale in comparison to actual treatments for RA.
A later study using a health insurance claim database (Is there an anti-inflammatory effect of statins in rheumatoid arthritis? Analysis of a large routinely collected claims database - PubMed) did not find anything in ~40,000 RA patients and statin users:
These data do not show any beneficial effect of statins in reducing disease inflammation in RA patients.
And there were other RCTs of statins for non-LDL-lowering indications:
Aortic stenosis: SALTIRE (atorvastatin), SEAS (simvastatin/ezetimibe), and ASTRONOMER (rosuvastatin) - all failed to show effects
Atrial fibrillation and post-surgery: STICS 20mg Rosuvastatin) - failed to show effect
COPD: STATCOPE trial (simvastatin) - failed to show effect
So overall, I totally agree that statins are good drugs (I take 10mg Rosuvastatin per day), but we also have to consider that in this thread alone we’ve also had many people saying that they have myopathy, and several members can’t or won’t take them at all.
So, if there’s a choice between taking a low dose or taking none, people should generally prefer the lower dose IMO. And if you’ve got people with LDL-C sitting at 80, I still think it’s generally better to add a second low-dose medication to get that down to 50, rather than doubling up their statin at the risk of adverse effects which make them stop entirely and lose all benefits. I definitely can’t see a strong motivation for taking statins for cancer prevention or anything else, based on the evidence above.