NOW Collagen Peptides Powder

Our assessment

The evidence shows that the primary ingredient in this product, calcium, has a well-established role in bone health, but the specific formulation of collagen peptides is not covered by the data provided. For calcium, the data confirms it supports bone mineralization and density, as well as neuromuscular relaxation [NIH ODS]. However, without specific data on collagen peptides, we cannot assess its benefits for joint or skin health from this source.

How it works

Think of calcium as a structural building block for your skeleton. It works by depositing into your bones to maintain density and strength, and it also helps your muscles relax and your nerves send signals properly [NIH ODS]. The collagen peptide form in this product is not detailed in the provided data, so its mechanism of action is not available.

Safety profile

Based on the FDA adverse event data, there were 592,059 total reports across all supplements, though this number is not specific to this product. For calcium specifically, the data warns that high intakes might increase the risk of heart disease and prostate cancer. Side effects from high calcium levels include poor muscle tone, poor kidney function, low phosphate levels, 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 the absorption of medications such as bisphosphonates, tetracycline and fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Data not available for a specific recommendation on NOW Collagen Peptides Powder. For calcium intake, the data supports a role in bone health, but you should monitor your total calcium intake from all sources to avoid high levels [NIH ODS]. If you are taking any of the listed medications, separate your calcium supplement by at least two hours to prevent absorption issues [NIH ODS].

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