Hands down, bone broth. Specifically, beef bone broth.
My mom introduced it a few years back after asking a coworker how their hair and skin was so healthy. According to her coworker it was thanks to bone broth. They explained how when their husband underwent chemotherapy, they began taking bone broth every morning and it not only helped their husband, but them as well. So of course my mom got the recipe.
Have I had a cup every day since? Eh…I’ve fallen off the wagon a few times, but lately I’ve been on top of it. Shout out to my partner who now drinks it with me five days a week!
SIDE NOTE: I don’t make it at home or have the recipe. I just buy it at my local grocery store, but there are loads of great recipes online for anyone who may be interested.