Herb Pharm Cramp Bark
Brand: Herb Pharm · Form: LIQUID, SUPPLEMENT FORM [E0165]
Our assessment
The evidence shows that the active ingredient in this product, calcium, is primarily used for bone health. However, for a product marketed as "Cramp Bark," the data does not support using calcium supplements specifically for muscle cramp relief. The notion of neuromuscular relaxation is mentioned in the data, but it is not a clinically proven effect for supplement use [NIH ODS].
How it works
Think of calcium as a key player in two separate systems. First, it is essential for bone mineralization, where it helps deposit minerals into your skeleton to maintain density and strength. Second, it plays a role in neuromuscular relaxation, meaning it helps your nerves and muscles communicate properly for relaxation and signaling [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports across all supplements. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High levels 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] [FDA data].
Our recommendation
Start by getting your calcium from food sources. If you need a supplement, do not exceed the RDA without medical supervision. Be aware that calcium can reduce the absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. We cannot recommend this product for cramp relief based on the available data.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Herb Pharm |
|---|---|
| Serving Size | |
| Contents | 4.0 fl. Oz. 120.0 mL |
| Market Status | Off Market |
How to Read This Label
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