Benefits of Broccoli Sprouts
for Smokers
How Can Broccoli Sprouts Help Your Body Flush Out Toxic Chemicals?
An Explanation of a 2014 Study on Cancer Prevention
Egner PA, Chen JG, Zarth AT, Ng DK, Wang JB, Kensler KH, Jacobson LP, Muñoz A, Johnson JL, Groopman JD, Fahey JW, Talalay P, Zhu J, Chen TY, Qian GS, Carmella SG, Hecht SS, Kensler TW. Rapid and sustainable detoxication of airborne pollutants by broccoli sprout beverage: results of a randomized clinical trial in China. Cancer Prev Res (Phila). 2014 Aug;7(8):813-23.
Think of your body like a city. Pollution — from car exhaust, factory smoke, or cigarettes — is constantly dumping toxic waste into that city. Your body has a sanitation department (a set of liver enzymes) whose job is to grab those toxins, tag them for removal, and flush them out through your urine. This study asked a simple question: can drinking a broccoli sprout beverage supercharge that sanitation department?
The answer was yes.
What the Researchers Actually Did
291 adults in a heavily polluted region of China drank either a broccoli sprout beverage or a plain pineapple-lime drink every day for 12 weeks. Then scientists measured how much toxic chemical was showing up in their urine — because when your body successfully neutralizes a toxin, it dumps the leftover "tagged" version out through urine. More tagged toxin in the urine = more toxin successfully removed from the body.
Here’s how it works:
Step 1: You eat broccoli sprouts
Raw broccoli sprouts contain a locked-up compound called glucoraphanin. When you chew them (or drink the beverage), an enzyme in the plant — along with bacteria in your gut — unlocks glucoraphanin and releases the active ingredient: sulforaphane.
Step 2: Sulforaphane flips a switch in your cells
Sulforaphane travels through your bloodstream and enters your cells, where it flips a master switch called NRF2. You can think of NRF2 as the dispatcher for your body's cleanup crew. Normally it sits idle. Sulforaphane wakes it up.
Step 3: Your body produces more cleanup enzymes
Once NRF2 is activated, your body starts producing significantly more detox enzymes — proteins whose sole job is to grab toxic chemicals, attach a "dispose of me" tag to them, and escort them out of your body through your urine.
Step 4: More toxins leave your body faster
Benzene and acrolein — both found in cigarette smoke AND air pollution — get grabbed, tagged, and flushed out: 61% and 23% faster, respectively, in people drinking the broccoli sprout beverage.
So What Does This Mean for Smokers?
Benzene and acrolein are major chemicals in cigarette smoke — not just factory exhaust. Every cigarette delivers a concentrated dose of both. While this study's participants were mostly breathing polluted air (rather than smoking), the body processes benzene and acrolein the same way regardless of where they came from — a cigarette or a smokestack.
So yes, the biology absolutely applies to smokers.
The Bottom Line
Drinking a broccoli sprout beverage was able to flush out 61% more benzene — a cancer-causing chemical found in cigarette smoke and air pollution — from the bloodstream of study participants from the very first day, meaning the results were obtained after just ONE DOSE with no drop-off over three months.
Broccoli sprouts can't undo decades of smoking or living in a polluted city. But what this study shows is that a simple, affordable, food-based drink can give your body's own natural detox system a meaningful and lasting boost — with solid science behind why it works, not just that it works. If you’re contemplating cutting out cigarettes, maybe give yourself a little head start by adding broccoli sprouts into your daily diet! This is about as good as nutritional science gets.
