Roex A&D3 With Vitamin E & Zinc

Our assessment

The evidence shows that the combination of vitamin A, vitamin D3, vitamin E, and zinc in Roex A&D3 can support several key functions, but you need to be aware of the specific data behind each ingredient. Our assessment is that this product provides a blend that targets immune function and bone health, but you must carefully consider your existing diet and any medications you take to avoid exceeding safe intake levels.

How it works

Think of this formula as a multifunctional support system. Calcium is included for bone mineralization and neuromuscular relaxation, helping maintain bone density and proper nerve signaling [NIH ODS]. Vitamin D3 works alongside calcium to regulate absorption, while zinc plays a role in immune cell function. Vitamin E acts as an antioxidant, protecting cell membranes from oxidative stress. Together, these ingredients support skeletal strength and immune response [NIH ODS].

Safety profile

The data integrity rules require us to report that the FDA received a total of 592,059 adverse event reports across all supplements in their database. For the specific ingredients in this product, you should know that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High calcium levels can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Additionally, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Our recommendation is to start by reviewing your daily intake from food and other supplements. Do not exceed the tolerable upper intake levels for vitamin A, vitamin D, zinc, or calcium without professional guidance. If you take any prescription medications, especially those listed in the interactions, take this supplement at least two hours apart from your medication. For most adults, a balanced diet may already provide adequate levels of these nutrients, so consider this product only if a healthcare provider confirms a specific need based on lab work.

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