The phrase "are commonly recommended" is correct and usable in written English.
It can be used when discussing suggestions or advice that are frequently given or endorsed by experts or sources.
Example: "These exercises are commonly recommended for improving flexibility and strength."
Alternatives: "are often suggested" or "are frequently advised".
Antioxidants are commonly recommended — because the aging process is believed to be related in part to oxidized damage to tissues, including the auditory nerve — although no practical benefit has been documented.
Vegetated filter strips (VFS) are commonly recommended as a best management practice to prevent manure-borne microorganisms from reaching surface water resources.
Sensory-based activities are commonly recommended for students with ASD, even in the absence of empirical data to substantiate their effectiveness.
Aggressive surgical resection with intent to cure and surgical debulking procedures are commonly recommended in patients with metastatic pheochromocytoma and paraganglioma.
Metal roofs are commonly recommended for rainwater harvesting applications, and this study showed that rainwater harvested from metal roofs tends to have lower concentrations of fecal indicator bacteria as compared to other roofing materials.
We clearly and quantitatively demonstrate that collections with spatially limited or biased sampling arrangements, or collections from species with high selfing or low dispersal, will need substantially more samples than are commonly recommended, or else will fail to reach the targeted genetic diversity.
But because breast abnormalities can develop so soon after a woman starts taking hormones, the new findings are now raising questions about the safety of even short-term use, which is commonly recommended to treat severe hot flashes and other menopausal symptoms.
