Set your mushrooms in sunlight before you cook them and they will make their own vitamin D. Eat them regularly, and you get that plus an antioxidant tied to a sharper aging brain.
Mushrooms carry a compound that turns into vitamin D under ultraviolet light, exactly as your skin does. Placing them gills-up in direct sun for even fifteen minutes to an hour can sharply raise their vitamin D, and some stores sell mushrooms already UV-treated.
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One honest note on that. The form they make is vitamin D2, which is somewhat less potent than the D3 in sunlight and supplements, so this is a useful contribution, not a replacement for testing and correcting a real deficiency.
The second reason is ergothioneine. Mushrooms are the richest food source of this antioxidant, and in population studies people who eat more mushrooms show lower rates of cognitive decline.
Hold that at the right strength. The cognition link is observational and not proven to be cause and effect, so eat mushrooms as a healthy, low-risk food rather than a brain treatment.
Cook them, do not eat them raw. Cooking improves digestibility, unlocks nutrients, and breaks down a mildly concerning compound found in raw mushrooms, and never eat wild ones unless an expert identified them.
Make them a staple. Rotate button, cremini, shiitake, oyster, and maitake, and use their savory umami to cut back on salt or stretch the meat in a dish, all for very few calories.
This suits your stage on several fronts. The vitamin D helps bone and muscle, the fiber and umami help your heart and your waistline, and the brain signal, while early, points the right way.
Mushrooms are a cheap, low-calorie food that can make vitamin D in the sun and may help your brain. Sun them, cook them, and work them into your week.
