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"Our interpretation is that these phytosterol molecular fossils record the rise of algae in ancient oceans, and that animals abandoned phytosterol production when they could easily obtain it from this increasingly abundant food source," Gold said.

Aim to get about 2 grams of phytosterol a day.

You can incorporate phytosterol into your diet.

The word "phytosterol" may be unfamiliar but you've probably been eating them your whole life.

They get great ratings for phytosterol, protein and fiber content.