Green tea for fertility

On this page

1. What is green tea?
2. Function and how it works
3. Fertility benefits
4. Recommended daily intake
5. Sources
6. Cautions and contraindications
7. My Fertility Guide
8. Related pages

1. What is green tea?

Green, white and black teas all come from the same shrub, Camellia sinensis; black tea is fermented green tea. Green tea is rich in catechins, particularly epigallocatechin gallate (EGCG), one of the most potent antioxidants in the plant world. The antioxidants in green tea are estimated to be approximately 100 times more powerful than vitamin C and 25 times more powerful than vitamin E.

Reference ranges and recommended intakes vary from country to country — always interpret guidance against the recommendations of your own healthcare authority.

2. Function and how it works

Green tea has multiple effects relevant to fertility:

1. Powerful antioxidant. EGCG and other catechins protect eggs and sperm from oxidative damage.
2. Weight management. Green tea catechins support healthy fat metabolism, relevant in PCOS and overweight infertility.
3. Blood pressure. Green tea may modestly lower blood pressure and improve circulation.
4. Reduces blood stickiness. Green tea has mild antiplatelet effects that improve circulation.

3. Fertility benefits

Modest green tea consumption (1–2 cups per day) provides antioxidant support without significantly affecting hormones. However, green tea contains caffeine, which has known fertility downsides:

1. Caffeine increases SHBG, which reduces free testosterone needed for follicle and sperm development.
2. Caffeine reduces calcium and iron absorption.
3. Caffeine can affect implantation and increase miscarriage risk at high intakes.

For these reasons, I generally recommend decaffeinated green tea for women trying to conceive, which retains most of the antioxidant benefit without the caffeine downsides.

4. Recommended daily intake

I recommend up to 2–3 cups of decaffeinated green tea per day for fertility support. Avoid green tea extract supplements (which can contain very high concentrations of catechins) without medical supervision — cases of liver toxicity have been reported with high-dose extracts.

5. Sources

Green tea is widely available as:

1. Loose-leaf tea
2. Tea bags (regular and decaffeinated)
3. Matcha (powdered green tea, very concentrated)
4. Bottled green tea drinks (often high in added sugar — check labels)

6. Cautions and contraindications

1. Avoid high-dose green tea extract supplements without medical supervision — rare cases of liver toxicity have been reported.
2. Choose decaffeinated green tea for fertility support.
3. Tannins in green tea reduce iron absorption — drink between meals if iron deficient.
4. Avoid drinking green tea with iron supplements.
5. Always consult with a fertility specialist or your doctor before starting any new supplement regime.

7. My Fertility Guide

8. Related pages

• Fertility supplements directory
• Vitamin C
• Vitamin E
• Alpha lipoic acid
• Iron
• SHBG (sex hormone-binding globulin)