Soy Protein Isolate (100 G)

Avoid taking soy protein isolate on an empty stomach; have it with a mixed meal or snack containing fiber and fat, such as chia seeds, almonds, or plain Greek yogurt.

Use a smaller serving of soy protein isolate and split it into two portions taken several hours apart rather than one large shake.

Choose an unsweetened, minimally flavored soy protein isolate and check the label for added sugars, sugar alcohols, or stimulant ingredients that may worsen glucose variability.

Add a slow-digesting carbohydrate source to the shake or meal, such as steel-cut oats, lentils, or berries, and monitor your individual response.

Drink the shake more slowly and avoid using it immediately before or after unusually intense exercise until you know how that timing affects you.

If you develop symptoms of low glucose—such as shakiness, sweating, confusion, or dizziness—or repeated significant drops, stop experimenting and discuss this with a clinician or diabetes professional.