Does searing actually seal in juices?
This is one of the most repeated claims in cooking, and it doesn't hold up -- but the real reason to sear is arguably a better one anyway.
The kitchen answer
No -- a seared crust isn't waterproof, and it doesn't trap moisture inside. Meat loses moisture based on how hot it gets inside and for how long, regardless of whether the outside was seared first. Searing is entirely about flavor.
What's actually happening
A seared crust is porous, cooked protein and browned compounds from the Maillard reaction -- it has no physical mechanism to form a seal against liquid water moving through it. Moisture loss during cooking happens because heat causes muscle proteins to denature and contract, physically squeezing water out of the meat's structure -- a process governed by internal temperature and time, entirely independent of whatever's happening at the surface.
What searing actually does is generate the Maillard reaction's hundreds of flavor and aroma compounds at the surface -- real flavor, just not moisture retention. The confusion likely comes from a seared piece of meat tasting richer and more savory, which reads as "juicier" even when the measurable water content is the same or lower than an unseared piece cooked to the same internal temperature.
What does that mean for your recipe
If moisture retention is the actual goal, the lever that matters is not overshooting the target internal temperature and letting the meat rest afterward (giving redistributed juices time to re-settle through the fibers) -- not which order you sear in. Reverse-searing (cooking low and slow first, searing at the very end) exists specifically because it separates those two concerns cleanly: gentle, even cooking for doneness, then a hot sear purely for crust and flavor.
What can go wrong
- Searing first, then overcooking anyway: the sear did its job (flavor); the dryness came entirely from the internal temperature afterward, not from skipping or mistiming the sear.
- Skipping the rest after cooking: juices haven't had time to redistribute evenly through the fibers, so more runs out when it's cut -- unrelated to searing.
- Blaming a dry result on "not searing hard enough": searing harder doesn't create a seal that didn't exist in the first place; it just adds more browning and can risk overcooking the exterior.
Try it yourself
Same cut, same final temperature, different order:
- Cook one piece of meat seared first, then finished to a target internal temperature.
- Cook an identical piece to the same internal temperature without searing at all.
- Weigh both before and after cooking.
Watch for: both pieces losing a comparable percentage of their weight in moisture, despite one having a seared crust and the other not -- direct evidence that searing order didn't change how much water was lost.
Go deeper
This is a genuinely old food-science correction -- the "searing seals in juices" claim has been directly tested and disproven repeatedly by comparing seared and unseared meat cooked to identical internal temperatures, going back decades in food science literature, yet it persists because the flavor improvement from Maillard browning is real and easily mistaken for a juiciness improvement.