It's always a good idea to do a quackwatch search whenever you want to check if a remedy is useful or safe (http://www.quackwatch.org/).
The 5-htp scare was linked to a particular brand that is now out of the market. If 5-htp is not synthetized but extracted from natural sources it should be safe, though not necessarily effective. Just remember that these remedies reach the market without any research on their usefulness or safety.
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