The phrase "form of a dietary supplement" means a type or way in which a substance is produced or presented for consuming as a supplement to your diet. Full definition
Cease and desist letters were sent by AG Eric Schneiderman's office to a number of supplement companies that call for them to stop sales, marketing or distributing allegedly adulterated or misbranded forms of a dietary supplement known as «devil's claw.» (nystateofpolitics.com)
For this reason, many alternative forms of dietary supplements have been developed with the intent of bypassing the digestive tract for more direct nutrient delivery and bioavailability. (drvitaminsolutions.com)
Too much zinc, taken in the form of dietary supplements, may disrupt copper uptake, leading to neurological problems and anemia, the evidence indicates. (sciencedaily.com)