I'm on anastrozole. I ran a 60-day experiment on myself with Tart cherry to see if it could relieve my own joint pain. Here's what actually happened. I've been a medical oncologist for 24 years, and I've prescribed over 5,000 aromatase inhibitors over the course of my career. And I've sat across the desk from thousands of patients and explained the same things over and over again. The morning stiffness that turns your hands into fists you can't open. The stairs that make you grip the railing with both hands. The feeling that your joints aged 30 years overnight. I've watched patients break down in my exam room because they can't keep living like this, but they know they can't stop the pill either. Around 4 years ago, it happened to me. I'm 58. I got the same diagnosis I'd given to thousands of other women. ER+, Stage 2. And a year later, my own oncologist handed me the same prescription I'd been writing for years. Anastrozole, 1mg, every morning. I knew what the drug did. I'd explained it to thousands of women. What I didn't fully understand was what losing estrogen would do to my own joints. At first I thought I'd be one of the lucky ones. I'd seen plenty of patients who barely noticed the side effects. The first few weeks, I felt fine. Then one morning I couldn't close my hand around my coffee cup. My fingers were swollen and stiff, like I'd slept on them wrong. Except I hadn't. Then came the stairs. I live in a two-story. I've taken those stairs without thinking about it my entire life. Now I was gripping the railing and going down one step at a time. Every morning I'd wake up and test how bad today was going to be. Swing my legs off the bed. Try to stand. Some mornings I'd get to the bathroom without wincing. Some mornings I had to hold the wall. The same stiffness I'd told my patients was manageable, I now dreaded in myself. I started rearranging my whole evening so I wouldn't have to go up and down those stairs. The irony wasn't lost on me. Now I was the patient. Every single one of them was right. My doctor wanted to start me on a daily anti-inflammatory. Something to take the edge off, she said. I told her I'd think about it. But I knew I wasn't going to take it. I've prescribed Celebrex, Naproxen, Meloxicam, and every other anti-inflammatory on the market over the years. I also see what they do to people. The liver damage that shows up on bloodwork after years of daily use. The kidney problems that creep in so slowly my patients don't catch them until the labs come back wrong. One of my patients was on prescription-strength Naproxen for 6 years. She had a heart attack at 61. Her cardiologist told me the long-term NSAID use helped put her there. And the worst part? Half my patients on anti-inflammatories take one every morning and by evening the stiffness is right back. My own mother was diagnosed at 67. Rang the bell eighteen months later. She was put on Letrozole. The joint pain got so bad she stopped taking it after 8 months. She told me she'd rather take her chances. Two years later, it came back. I'm an oncologist, and I couldn't save her. I wasn't going to do that to myself. So I did what I told every patient to do first. I started a stretching routine every morning. Walked 30 minutes a day. Added yoga twice a week. It helped a little. The stiffness wasn't quite as sharp by mid-morning. But I was still gripping the railing on the stairs. Still waking up feeling 30 years older than I am. I tried Tart cherry too. The literature on Tart cherry and inflammation is solid, I've recommended it to patients for years. I bought Tart cherry capsules from Amazon, the one with all the 5-star reviews. Took it every morning for 6 weeks. Nothing changed. I tried Tart cherry juice I found in the store. Same result. I figured my own physiology must just be too far gone for any of this to make a difference. Then about 2 months ago, one of my regular patients came in for her annual scans. Sweet woman, her name is Julie, 65 years old. She'd been on Letrozole for four years and the joint pain had only gotten worse. We were talking about cortisone shots for her knees. The anti-inflammatory she'd been on wasn't cutting it anymore. But this time something looked different. She walked into my office without holding the doorframe. She sat down in the chair without bracing herself. She crossed her legs. I asked her what she was doing differently. She got a little sheepish and said "Nancy, I added something on my own. I didn't want to bother you about it." I told her she could bother me about it. She pulled a bottle of Tart cherry capsules out of her purse and said this was the only thing that had touched the pain. Then she said, "I tried to tell my friend Carol about it but the cheap kind doesn't work, you have to get the right one." I'll be honest, I was very skeptical. Patients bring me supplements every week and 99% of them are nonsense. But she was right there in front of me, sitting comfortably in a chair she used to white-knuckle her way out of, and I knew her well enough to know she wasn't faking it. That night I stood at the bottom of my stairs for a full minute before I started climbing. I sat on the edge of my bed feeling defeated. So I got out my laptop and went deeper into the literature than I had in years. Here's what I found, and I'll keep it simple. The active compounds in Tart cherry are called Anthocyanins. Here's what most women on an aromatase inhibitor don't understand. The drug isn't creating the pain. It's removing the thing that was hiding it. Every time you walk, climb stairs, open a tight jar, your joints take on micro-damage. Over decades, that builds into a low-grade inflammation that never fully goes away. But you never notice it because estrogen keeps it quiet. It keeps that fire low enough that you never feel it. The whole point of an aromatase inhibitor is to strip the estrogen out. That's how it does its job. But the day the estrogen drops, that fire starts to climb. That’s what you feel in the morning the second your feet hit the floor. Anthocyanins neutralize the inflammation that rises when estrogen drops. They do it by a completely different pathway. They never touch estrogen. They never interfere with the aromatase inhibitor. They go directly to the fire and put it out, and your hormone levels stay exactly where your pill put them. When the fire is put out, the stiffness eases. Your hands open in the morning. The stairs stop being something you dread. And you stay on the drug. That's the whole pathway. The clinical studies that actually showed Tart cherry reducing joint inflammation used a standardized extract with a guaranteed amount of anthocyanins in every dose. Then I went and looked at the raw Tart cherry powder I could have grabbed off Amazon. Dried cherries, ground up, no standardization at all. No way to know how many anthocyanins were even in it. The capsules I'd seen? A token amount buried in flour. The clinical studies used many times that. No wonder no one was seeing results. I kept reading. The bigger problem isn't even the dose, it's the processing. Most tart cherry supplements are spray-dried at over 200°F to turn them into powder. That heat destroys the anthocyanins before the powder ever gets bottled. So even when a label says "1000mg of tart cherry," the actual active compound inside is mostly dead by the time you swallow it. I'd been recommending Tart cherry for women on hormone blockers for years and I'd never actually checked the standardization or the extraction method on the brands people were buying. None of them were getting close to the clinical dose. None of us were. I started looking for any Tart cherry supplement that was, and it came down to three things. It was the third one that almost no brand will actually check. ✅ No heat processing, cold processed (so the delicate anthocyanins survive) ✅ Organic and third-party tested (an outside lab confirms what's actually in the bottle) ✅ A standardized extract, not raw powder (so you actually get the clinical dose of active compounds) I kept seeing the same brand mentioned over and over in the reviews. Senaria. The same one in my patient's purse. I ordered it. It was more expensive than the raw powders and the off-the-shelf capsules I'd tried. At that point I didn't care. Senaria's Tart Cherry was a standardized organic tart cherry extract, third-party verified by an outside lab. No heat processing, no spray drying, no fillers. Capsule form, which I appreciated since I knew how sour raw tart cherry can be. Two capsules with breakfast that Monday morning. The first week, I noticed my hands weren't as stiff when I woke up. The swelling in my knuckles had gone down just enough that I could tell. I didn't trust it. I've seen too many placebo effects in my career. It was week 2 that made me stop doubting. By week 2, I was getting out of bed without holding the nightstand. The morning warm-up that used to take 20 minutes was down to 5. I started taking the stairs without thinking about it. By day 30, I was walking through the clinic the way I used to. One of the nurses asked if I'd changed my shoes. I hadn't changed my shoes. At day 60, I hiked 4 miles with my sister at a state park we used to go to every summer. I hadn't been able to do that trail in years. For the first time in 3 years, I felt like I was in my own body again. I sat at the kitchen counter and cried. I'm an oncologist. I prescribe aromatase inhibitors. And nothing I'd done for 3 years had given me back the body I had before my diagnosis. That morning stiffness that used to set the mood for my whole day? Gone. The stairs I'd been avoiding for 2 years? I take them without thinking about it now. I sleep through the night without waking up dreading the first steps out of bed. When I went back to my doctor for my full bloodwork and she pulled up my labs, my inflammation markers had dropped across the board. She looked at me and said, "Whatever you're doing, it’s working." She actually asked what I had changed so she could mention it to a few of her own patients. I've quietly mentioned Senaria to 12 of my own patients on aromatase inhibitors since then. The ones who've followed through have all come back moving better. One woman who'd been on Anastrozole for 8 years told me she could walk again without pain. She told me she put her wedding ring back on for the first time since her third month on the drug. Look, for almost 3 years I thought I had two options. Keep taking the anastrozole and live with zero quality of life, or stop it and end up like my mother. As an oncologist, I knew exactly where the second road ended. I was wrong about the first option being my only alternative. And here's something I wish I'd understood sooner. Not all Tart cherry is the same. Remember what my patient said in my office, that the cheap kind doesn't work? This is what she meant, and I didn't understand it until I read the research myself. I wasted 6 weeks on Tart cherry that could never touch my real problem, and if I'd grabbed the first cheap Tart cherry capsules off Amazon it would have been the same story. Senaria's standardized, cold processed, third party tested extract is the only kind that actually made a difference in my joints. They offer a 90 day money back guarantee. If you don't feel any different, you get a full refund. No questions asked. In 24 years of practicing oncology, I have never seen a pharmaceutical company offer to give your money back if their drug doesn't work. Think about that for a second. And here's the thing. If my patient hadn't pulled that bottle out of her purse, I'd still be avoiding the stairs, dreading every morning, and counting down the days until I couldn't take it anymore and stopped the pill like my mother did. I'm sharing this because I hope it helps someone else. After 24 years as an oncologist, I thought I knew every option for the joint pain. Turns out, my patient knew something I didn't. Here's where I got mine: https://trysenaria.com/products/organic-tart-cherry-extract-capsules ~ Nancy Brennan P.S. Senaria is a small company. They produce in small batches to keep the potency intact, which means they sell out regularly. If you're on an aromatase inhibitor and the joint pain is making you think about quitting, check availability now. Don't wait. Every day that fire keeps burning unchecked is another day closer to the conversation I had to have about my own mother. P.P.S. The 90 day guarantee is the part I keep coming back to. I have handed out thousands of prescriptions in my career. None of them came with "if this doesn't work we'll give you your money back." Not one. Whatever you decide, that detail is worth thinking about.
Not enough history yet to show a trend.