Quick answer: A proprietary blend lists ingredients together with a combined weight instead of individual amounts. That makes it hard to compare a product with research. Check whether your LungZen label uses one.
What a blend is
Companies can group ingredients under one name and list only the total. Ingredients are usually listed in descending order by weight.
Why it matters
You cannot tell whether a useful amount of any one ingredient is present, or whether a small amount of a headline ingredient is hidden among cheaper ones.
What to do
- Look for individual amounts on the Supplement Facts panel
- Be cautious of long ingredient lists with a single combined weight
- Ask the seller for a full panel if it is not shown
The seller’s page for LungZen does not publish an ingredient list, so we cannot say whether a blend is used.