Personally, I would not touch Doc Parsley's Sleep Remedy until he lists the dosage of the ingredients in it. L-Tryptophan is just a precursor to 5-HTP which is a precursor to melatonin and serotonin. Why does he include L-Tryp, 5-HTP and melatonin ? Just seems odd. He includes a GABA like compound called phenibut that has some contraindications and its use is controversial and can have withdrawal problems. What form of magnesium is in it ? It appears to be mag oxide because he warns of diarrhea from taking too much. Mag oxide is not absorbed well and is the form used in laxatives.
Each packet is 5.8 grams with 1.1 gram of proprietary sleep blend. That is a large dose to take without knowing what is in it.
From his web site.
Serving Size: Approximately 5.8 Grams (1 Packet)

Servings per Container: 30
Calories 5
Total Fat 0g
Trans Fat 0g
Sodium 0mg 0%
Total Carbohydrate <1g 0%
Sugars 0g 0%
Protein 0g
Vitamin D as Cholecalciferol 1000%
Magnesium as Citrate 100%

Proprietary Sleep Blend 1100mg

L-Trytophan, GABA (as phGABA), 5-Hydroxytrytophan, Melatonin.

Other Ingredients
Xylitol, Citric Acid, Natural Flavors, Stevia 80% Glycosides, Natural Colors.

Not a significant source of calories from Cholesterol, Dietary Fiber, Vitamin A, C, or Iron.

The numbers just don't add up and look scary to me.