Source Naturals Super Amino Night

Our assessment

The evidence shows that the primary active ingredient in Source Naturals Super Amino Night is Calcium, a mineral important for bone health and muscle function [NIH ODS]. Our assessment is that this product may support nighttime relaxation through calcium’s role in neuromuscular relaxation, but the data on its specific formulation for sleep is not available beyond this ingredient [NIH ODS]. You should understand that the benefits are tied to calcium’s known functions, not a unique blend proven for sleep support.

How it works

Think of calcium as a master regulator for your nerves and muscles. It supports bone mineralization to maintain strong bones and promotes neuromuscular relaxation, which helps your muscles relax and nerves signal properly [NIH ODS]. This relaxation effect is why calcium is sometimes linked to better sleep, though the data does not confirm a direct sleep-inducing mechanism for this product.

Safety profile

FDA has received a total of 592,059 adverse event reports for products in this category, though specific report counts for Source Naturals Super Amino Night are not available [FDA data]. Side effects from high calcium intake include constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, and abnormal heart rhythms [NIH ODS]. High calcium levels can also cause poor muscle tone, poor kidney function, and a high risk of death from heart disease [NIH ODS]. You should be aware that calcium can reduce absorption of bisphosphonates, tetracycline and fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Start by assessing your current calcium intake from food and other supplements before adding this product. If you take medications for osteoporosis, thyroid conditions, or infections, take them at least two hours apart from this supplement due to absorption interference [NIH ODS]. Do not exceed the recommended dose, and consult your doctor if you have a history of kidney stones, heart disease, or prostate cancer [NIH ODS]. Data not available for specific dosing or efficacy of this blend for sleep.

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