Melatonin is a natural chemical created in your body, so no it is NOT bad for your heart. Melatonin vitamins can be bad for your body but your heart is safe.
Too much Melatonin can cause kidney damage which caused urine odor. Beware!
Too much of anything can be bad.
Apparently too much laughter is bad for you.
Yeah I think if you take too much. That happened to me after I took 20mg
If you do it too much it is bad.
Uhhh you like die.
There's been no evidence that melatonin is a drug that is capable of an OD. Personally, I've taken several mgs (upwards of 20) and was fine. The only drawback is that you'll feel very groggy in the morning. Also, don't use too much, well, too much. Melatonin is a naturally occurring drug that is excreted from the pineal gland in the absence of light. If you continue to regularly take melatonin every night, it can temporarily disrupt melatonin production in the brain. It's not life-threatening by any means, but it can severely disrupt your natural sleep schedule.
Melatonin is used to decrease symptoms of jet lag. It would help you with drowsiness, sweating, fatigue, and increased heart rate experienced at jet lack. I don't think it would make you high unless you take too much.
Eating too much of anything is a bad thing. That's why its called "too much"
Well, nothing really. However, it's bad for you if you eat too much. It is bad for your health
yes you can either have too much or too less