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Threshold® Enterprises, Ltd. is a leading national nutritional supplements distributor and the manufacturer of Source Naturals® and Planetary® Herbals. Dedicated to creating scientifically optimized formulas for better health, the Source Naturals line includes the 1st place, award-winning WELLNESS FORMULA®, LIFE FORCE® MULTIPLE, and MELATONIN products. Planetary Herbals offers a full line of premium herbal products crafted by expert herbalists and validated by more than 30 years of clinical use.