Dr. Clark Research Association Dr. Clark Zentrum Deodorized Garlic Extract 300 mg

Our assessment

The evidence shows that this product is a deodorized garlic extract supplement. However, the available data primarily covers the ingredient calcium, not garlic. For calcium, the data is clear: it supports bone density and neuromuscular relaxation [NIH ODS]. But for Dr. Clark Research Association Dr. Clark Zentrum Deodorized Garlic Extract 300 mg specifically, we do not have clinical studies or safety data to evaluate its effectiveness for any specific health claim.

How it works

If you are taking this for calcium, think of it as a structural builder. Calcium works by supporting bone mineralization, which helps keep your skeleton strong, and it also supports nerve signaling and muscle relaxation [NIH ODS]. For the garlic component, data on its mechanism is not available from the provided sources.

Safety profile

FDA has received a total of 592,059 adverse event reports across all supplements, but specific reports for this product are not available. For the calcium component, safety concerns include constipation, nausea, weight loss, extreme tiredness, frequent urination, and abnormal heart rhythms at very high intakes [NIH ODS]. High calcium levels can also increase the risk of heart disease and prostate cancer [NIH ODS].

Our recommendation

Because data on this specific garlic extract is not available, we cannot recommend it for any particular use. If you are seeking calcium, you should know that calcium can reduce absorption of medications like bisphosphonates, tetracycline antibiotics, and levothyroxine [NIH ODS]. We advise speaking with your healthcare provider before starting this supplement, especially if you take any prescription medications.

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