ProPhase LabsPRPH +9.77% Days Inventory is 28.55 as of Dec. 2025, which is 64% below its 10-year median of 78.98. The stock has 4 warning signs investors should review. Among 177 Medical Diagnostics & Research companies, ProPhase Labs ranks worse than 60.45% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). ProPhase Labs's Average Total Inventories for the
three
months ended in Dec. 2025 was $0.17 Mil. ProPhase Labs's Cost of Goods Sold for the
three
months ended in Dec. 2025 was $0.54 Mil.
Hence, ProPhase Labs's Days Inventory for the
three
months ended in Dec. 2025 was 28.55.
The historical rank and industry rank for ProPhase Labs's Days Inventory or its related term are showing as below:
PRPH'
s Days Inventory Range Over the Past 10 Years
Min: 30.1 Med: 78.98 Max: 401.91
Current: 85.15
During the past 13 years, ProPhase Labs's highest Days Inventory was 401.91. The lowest was 30.10. And the median was 78.98.
PRPH's Days Inventory is ranked worse than 60.45% of 177
companies
in the Medical Diagnostics & Research industry
Industry Median: 70.8
vs PRPH: 85.15
ProPhase Labs's Days Inventory
declined
from Dec. 2024 (141.79) to Dec. 2025 (28.55).
Inventory Turnover measures how fast the company turns over its inventory within a year.
ProPhase Labs's Inventory Turnover for the
three
months ended in Dec. 2025 was 3.20.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
ProPhase Labs's Inventory-to-Revenue for the
three
months ended in Dec. 2025 was 0.21.
ProPhase Labs (OTCPK:PRPH) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
ProPhase Labs's Inventory Turnover for the
three
months ended in Dec. 2025 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
ProPhase Labs's Inventory to Revenue for the
three
months ended in Dec. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
ProPhase Labs Days Inventory Related Terms
ProPhase Labs Days Inventory Historical Data
* Premium members only.
The historical data trend for ProPhase Labs's Days Inventory can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
PRPH vs NSTM, IDTA, IVRO: Days Inventory Comparison
For the Diagnostics & Research subindustry, ProPhase Labs's Days Inventory, along with its competitors' market caps and Days Inventory data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
ProPhase Labs Days Inventory vs Medical Diagnostics & Research Industry
For the Medical Diagnostics & Research industry and Healthcare sector, ProPhase Labs's Days Inventory distribution charts can be found below:
* The bar in red indicates where ProPhase Labs's Days Inventory falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
ProPhase Labs (PRPH) has a Days Inventory of 28.55 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on ProPhase Labs and its competitors. This is 64% below median its historical median of 78.98. Over the past decade, ProPhase Labs' Days Inventory has ranged from 30.10 to 401.91. According to the industry distribution chart, ProPhase Labs ranks #107 out of 177 companies in the Medical Diagnostics & Research industry, placing it in the top 60.5%.
Is ProPhase Labs' Days Inventory too high?
ProPhase Labs' current Days Inventory of 28.55 is 64% below median its 10-year median of 78.98. Over the past 10 years, this metric has ranged from a low of 30.10 to a high of 401.91. The Medical Diagnostics & Research industry median Days Inventory is 70.80. ProPhase Labs' value of 28.55 is 59.7% below this industry median. Based on the distribution chart, ProPhase Labs ranks #107 out of 177 companies in the Medical Diagnostics & Research industry, which is below the industry midpoint.
How does ProPhase Labs' Days Inventory compare to NSTM and IDTA?
According to the Medical Diagnostics & Research industry distribution chart, ProPhase Labs ranks #107 out of 177 companies for Days Inventory. This places ProPhase Labs in the lower half of its industry. The industry median Days Inventory is 70.80. ProPhase Labs' value of 28.55 is 59.7% below this benchmark. Historically, ProPhase Labs' own Days Inventory has ranged from 30.10 to 401.91 over the past decade. While the company's 10-year median is 78.98 vs. the industry median of 70.80, ProPhase Labs has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Days Inventory for a Medical Diagnostics & Research company?
The median Days Inventory among Medical Diagnostics & Research companies is 70.80, based on 177 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. ProPhase Labs's current Days Inventory of 28.55 is 59.7% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on ProPhase Labs and its competitors. For the Medical Diagnostics & Research industry, the median Days Inventory is 70.80 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. ProPhase Labs's current Days Inventory is 28.55, which is 64% below median its own 10-year median of 78.98. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ProPhase Labs stock overvalued right now?
Based on GuruFocus' analysis, ProPhase Labs (PRPH) is currently considered Possible Value Trap. The stock's GF Value™ is $0.65, compared to a current price of $0.10 — trading 84.6% below its estimated fair value. The current Days Inventory is 28.55, which is 64% below median its 10-year median of 78.98 and 59.7% below the Medical Diagnostics & Research industry median of 70.80. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For ProPhase Labs (PRPH), the current Days Inventory is 28.55 as of Dec. 2025. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
ProPhase Labs Inc oriented and diversified next generation biotech, genomics and consumer products company that develops and commercializes novel drugs, dietary supplements, and compounds, and human genomic testing. It offer whole genome sequencing and related services. It maintain two operating segments: diagnostic services (which includes its COVID-19 and other diagnostic testing services) and consumer products. It generates majority of revenue from consumer products segment which engaged in the research, development, manufacture, distribution, marketing and sale of OTC consumer healthcare products and dietary supplements in the United States and also provides personal genomics products and services.
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