Chinese Yam (Shan Yao)
vegetable
Dioscorea polystachya or Chinese yam, also called cinnamon-vine, is a species of flowering plant in the yam family. It is sometimes called Chinese potato or by its Korean name ma. It is also called huaishan in Mandarin and wàaih sāan in Cantonese.
Conditions addressed
How to use
- Eat steamed, roasted, stir-fried, or raw in salads.
- Lightly cooking increases digestibility.
Pregnancy, Breastfeeding & Children
No herb-specific pregnancy/child safety research is documented for Chinese Yam (Shan Yao) in our references — the guidance below is based on its general effect category, not research on Chinese Yam (Shan Yao) itself. Always confirm with a midwife, doctor, or pediatrician.
Pregnancy
AvoidThis herb is associated with hormone-modulating activity. Because pregnancy is a uniquely hormone-sensitive state, herbs in this category are generally avoided unless specifically guided by a midwife or doctor — this is a general, mechanism-based caution, not herb-specific research.
Breastfeeding
Use CautionHormone-modulating herbs can potentially affect milk supply or pass hormone-active compounds to the infant — generally used cautiously and under guidance.
Children
AvoidHormone-modulating herbs are generally avoided in children given the sensitivity of ongoing hormonal development.
Interactions & contraindications
May have a stimulant effect
Watch for: Other caffeine-containing products, MAOIs, and stimulant medications (for ADHD or weight loss)
Additive stimulant effects can raise heart rate and blood pressure.
May affect blood sugar
Watch for: Insulin and oral diabetes medications (metformin, sulfonylureas)
Additive blood-sugar-lowering effects can risk hypoglycemia — monitor glucose closely.
May have a diuretic effect
Watch for: Diuretic medications and lithium
Additive fluid loss can affect electrolyte balance and change how the body clears lithium.
May affect hormone levels
Watch for: Hormone therapies, oral contraceptives, and tamoxifen or similar medications
Some herbs have mild phytoestrogenic or hormone-modulating activity that can interact with hormonal medications.