Soy Protein
Soy protein is the protein of the soybean, sold as isolates and powders. It is a different component from the isoflavones found in the same bean.
Also listed as Soy Protein Isolate, Soy Protein Powder, Soya Protein, Soya Protein Isolate
Allergy and digestive tolerance come first
Soy can cause allergic reactions, and soy products can cause bloating, diarrhea or nausea. NCCIH reports that soy protein supplements have been used safely for up to sixteen weeks in studies; longer-term supplement use needs its own safety assessment. 1
Ordinary foods and concentrated use are different questions
NCCIH cautions that amounts beyond normal food use may be unsafe during pregnancy and are poorly studied during breastfeeding. It also advises discussing soy products with a clinician when medicines are involved. 1
For information, not individual medical advice. Ingredient studies do not establish the effectiveness of these products.