Curd

Properties of curd:

• Yogurt is an aphrodisiac. It increases quantity and quality of semen.
• It is strength-promoting.
• It is good for digestion, diarrhea, intermittent fever¹ and painful urination.
• It boosts the appetite and increases haemoglobin.

Do's related to curd:

• Sweet buttermilk, rayata, yogurt curry prepared by diluting curd with water can be eaten at any time.
• Eat curd along with additives like - ghee, honey, sugar, cooked green gram, Indian gooseberry powder, roasted cumin seeds, rock salt etc.
• Eat curd only when it is well-set or completely coagulated.
• Cream of curd provides strength, increases semen, and is beneficial for piles.

Don'ts related to curd:

• Curd should not be eaten at night.
• It should not be boiled or heated in fire or sunlight.
• Do not use unset curd. It is especially obstructive in nature.
• Butter-less curd has different properties: it is dry, flatulent, increases Vata and constipation. So, do not consume butter-less yogurt in place of curd.

Seasonal rules for consumption of yogurt:

Curd should be consumed in:

• Monsoon
• Winter

Curd should not be consumed in¹:

• Summer
• Spring
• Autumn

Caution:

Curd can accumulate and can block the body channels. Curd if consumed in excess causes:

• Swelling 
• Blood disorders¹
• Fever
• Intrinsic hemorrhage
• Jaundice

References:

Primary Source: Acharya Balakrisna - A Practical Approach to The Science of Ayurveda - A Comprehensive Guide for Healthy Living.

1. English Translation of the Sushruta Samhita (Volume 3) Uttara Tantra - Kaviraj Kunja Lal Bhishagratna - Pg 269