Natural Force Collagen Peptides Unflavored

Our assessment

The evidence shows that Natural Force Collagen Peptides Unflavored is a dietary supplement, but its primary ingredient — collagen — is not covered by the data provided. The only ingredient with available data in this product is calcium, which is present in the formula. However, because the specific amount of calcium per serving is not listed, we cannot assess whether it provides a meaningful dose for bone health. Data not available on the collagen content or clinical studies for this specific product.

How it works

Calcium plays a key role in bone mineralization, helping to support bone density and mineral deposition [NIH ODS]. It also supports neuromuscular relaxation and nerve signaling [NIH ODS]. For collagen peptides to be effective, they typically need to be hydrolyzed for absorption, but no data on this product’s collagen type or absorption is provided. Data not available on how the collagen component functions.

Safety profile

FDA received 592,059 total adverse event reports across all supplement categories, but no specific reports are linked to this product [FDA data]. Regarding calcium, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce the absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Because the calcium content is not specified and the collagen component lacks supporting data, we cannot recommend this product for any specific health goal. If you are seeking calcium for bone health, use a supplement with a clearly labeled dose and consult your healthcare provider about potential interactions with medications [NIH ODS]. Data not available on the collagen efficacy or safety for this specific 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