Jarrow Formulas Melatonin Sustain

Our assessment

The evidence shows that Jarrow Formulas Melatonin Sustain is a product designed for sleep support, but the available data does not provide specific ingredient details for this formulation. Based on the general supplement category, melatonin is commonly used to help regulate sleep-wake cycles. However, we must rely strictly on the provided data, which does not list melatonin as an ingredient in this specific product. For calcium, a common mineral in some supplements, the data confirms it supports bone mineralization and neuromuscular relaxation [NIH ODS].

How it works

Think of calcium as a structural builder for your bones and a messenger for your nerves. It helps your body deposit minerals into bone tissue to maintain density and supports proper muscle relaxation and nerve signaling [NIH ODS]. Without sufficient calcium, your body may pull it from bones, weakening them over time.

Safety profile

FDA received a total of 592,059 adverse event reports across all supplement categories, though specific reports for this product are not available. For calcium, high intakes may increase the risk of heart disease and prostate cancer. Signs of excessive calcium include poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Start by verifying if Jarrow Formulas Melatonin Sustain contains calcium or other active ingredients from the product label, as specific data for this formulation is not provided. If you are taking any medications, especially those listed above, consult your pharmacist or doctor before adding a calcium-containing supplement. For general bone health, aim to meet calcium needs through diet first, and only supplement if advised by a healthcare professional [NIH ODS]. Data on melatonin-specific effects for this product is not available.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide