📊 Caffeine Input

☕ Choose Your Drink

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Coffee

95mg

🍵

Espresso

150mg

🥤

Energy Drink

200mg

🫖

Tea

50mg

Caffeine Amount (mg)

Standard coffee: 80-200mg, Energy drinks: 150-300mg

When did you drink it?

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Your Metabolism

Age, genetics, and medications affect caffeine metabolism

Desired Bedtime (Optional)

We'll tell you if caffeine will affect your sleep

📈 Your Caffeine Journey LIVE

0 mg

Currently in your system

↓ Decreasing

Caffeine Decay Timeline

Understanding Caffeine Half-Life

Caffeine half-life is the time it takes for the concentration of caffeine in your body to be reduced by half. This can vary significantly from person to person due to a variety of factors.

Factors That Influence Caffeine Metabolism

Genetics: Your genes play a major role in how quickly you metabolize caffeine.

Age: As you get older, your ability to process caffeine can slow down.

Liver Health: Your liver is the primary organ responsible for breaking down caffeine.

Medications: Certain medications can interfere with caffeine metabolism.

Pregnancy: Caffeine metabolism is significantly slower during pregnancy.

Tips for Managing Your Caffeine Intake

Here are some tips to help you manage your caffeine consumption for better sleep and overall health:

Know Your Limits: The FDA recommends a maximum of 400mg of caffeine per day for most healthy adults.

Time Your Last Dose: To avoid sleep disturbances, try to have your last caffeinated beverage at least 6-8 hours before bedtime.

Stay Hydrated: Drink plenty of water throughout the day to help your body process caffeine.

Listen to Your Body: Pay attention to how caffeine affects you and adjust your intake accordingly.

Frequently Asked Questions

How long does it take for caffeine to kick in?

You'll typically feel the effects of caffeine within 15-45 minutes of consumption.

Can I build a tolerance to caffeine?

Yes, with regular consumption, your body can become less sensitive to the effects of caffeine.

Is caffeine bad for you?

In moderation, caffeine is generally considered safe for most people. However, excessive consumption can lead to negative side effects like anxiety, insomnia, and digestive issues.

Caffeine Half-Life Calculator