You Have To Eat This Much Salmon To Get Enough Astaxanthin (Spoiler: It's A Lot) 

You see, to reap astaxanthin's benefits for skin health and wrinkle reduction, you need to eat a hefty amount of salmon each day.* (We're talking multiple fillets, here.) We explain the science below, as well as how to actually get your fill of the skin-smoothing antioxidant.*

How much astaxanthin is naturally found in salmon? According to Ferira, based on European EFSA and USDA analyses and data, there's about 0.5 milligrams of astaxanthin per salmon filet. Some quick mental math, and you end up with a whopping 12 (yes, 12!) fillets of salmon to reap the carotenoid's skin-supporting benefits.* 

Plus, a vast majority of astaxanthin in salmon is actually synthetic—it's cheaper to make, and it's typically added to feed for farm-raised salmon. This even applies to most salmon used in sushi. And the thing is, "synthetic astaxanthin happens to have a lower antioxidant capacity than the real stuff," notes Ferira. By "real stuff," she refers to the astaxanthin from green microalgae—salmon (and, shrimp, crab, etc.) eat this algae, and that's what gives them their pink pigment. "[Green algae] is one of the best sources because it's sustainable and clean," she adds. "That's the way to go if you're going to get a concentrated dose of astaxanthin in a supplement." 

We believe food is medicine—but sometimes, you literally can't eat your way to a certain phytonutrient. Such is the case with astaxanthin: You need to eat around 12 salmon fillets per day to reach the clinically significant amount for skin health,* and that's assuming said fillets don't have synthetic astaxanthin. Fear not, for you can always supplement with the potent carotenoid to meet the 6-milligram benchmark.*