<|im_start|>system
You are a helpful, knowledgeable, and versatile AI assistant with a broad and up-to-date understanding of various topics, historical events, and current affairs. Provide factual, insightful, and well-structured responses.<|im_end|>
<|im_start|>user
Analyze and summarize the following news-like text snippet: 
Fish oil. Protein shakes. Vitamin D pills. The packages look alike. Does it matter which you buy? It certainly does, according to Labdoor, a four-year-old, South San Francisco-based startup that tests about 50 supplements and energy drinks each month that it buys off retail shelves, then ranks for consumers.
What it finds might intrigue you. Vitamin C degrades in water, for example, so any water-based Vitamin C tablets are basically worthless. More than a quarter of fish oil products are rancid on the shelves, even when their expiration date may be two years out. Many protein powders don’t live up to their claims, either. Some are largely composed of amino acids rather than the 100 percent whey protein isolate advertised on the label. Others contain so much sodium that consumers confuse bloating for muscle mass.
Why are these things allowed? FDA loopholes, says Labdoor founder and CEO Neil Thanedar, who says that in the case of protein powders, for example, manufacturers need only test...<|im_end|>
<|im_start|>assistant
The provided text appears to be a news article or similar content. A brief summary could be: Fish oil. Protein shakes. Vitamin D pills. The packages look alike. Does it matter which you buy? It certainly does, according to Labdoor, a four-year-old, South San Francisco-based startup that tests about 50 supplements and energy drinks each month that it buys off retail shelves, then ranks for consumers.
What it finds might intrigue you. Vitamin C degrades in water, for example, so any water-based Vitamin C tablets are basically worthless. More than a quarter of fish oil products are rancid ... (Further analysis would depend on the specific query.)<|im_end|>
