Sundown Fiber Gummies With Vitamin D3

Our assessment

The evidence shows that this product combines two well-studied ingredients, but the specific formulation has significant gaps in publicly available data. Our assessment: you can get benefits for bone and muscle health from the calcium and vitamin D3, but the lack of a full ingredient disclosure is a major limitation for making a confident recommendation [NIH ODS].

How it works

Think of calcium as the building block for your bones and teeth, while vitamin D3 acts as the delivery system that helps your body absorb that calcium. The calcium in this gummy supports bone mineralization and helps your muscles relax and nerves signal properly [NIH ODS]. The vitamin D3 helps your immune system respond to threats and supports brain health through neuroplasticity [NIH ODS].

Safety profile

FDA received 592,059 total adverse event reports across all supplement categories, but specific reports for this gummy product are not available. For calcium specifically, very high intakes may increase the risk of heart disease and prostate cancer. High calcium levels can cause poor muscle tone, poor kidney function, 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]. Data not available on side effects specific to this gummy formulation.

Our recommendation

Data not available on the exact doses of calcium and vitamin D3 in this product, so we cannot give a standard dosing recommendation. If you take this supplement, take it with food for better calcium absorption, and separate it from medications like thyroid hormone or antibiotics by at least 2 hours [NIH ODS]. Without complete ingredient information, we recommend consulting your pharmacist or doctor before starting this product.

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