Can Lion's Mane mushrooms cause headaches as a side effect?

Not many studies have been done on the side effects of Lion's Mane, but they seem pretty outwardly safe. It's unlikely that the Lion's Mane mushrooms are causing your headaches.

Additionally, you should be alright to try taking the medicinal Lion's Mane mushrooms with CBD and see if they help the headaches. There don't appear to be any interactions between the two, though you should always check with your doctor first.

As there are many benefits with Lion's Mane, some people could also face side effects in the body. In the early days, while taking Lion's man, stomach upset happens. But headache is another notable symptom while taking it, especially in the beginning. However, many studies say that Lion's man is good for your brain as well as the nervous system.