Is it bad to take chlorophyll every day?

November 21, 2025 •

4 min read

According to the Linus Pauling Institute at Oregon State University, chlorophyllin has not shown toxic effects in decades of human use, but daily intake still requires consideration. While generally safe in moderation, some individuals may experience side effects, and insufficient research exists on its long-term impact. This article explores whether it is bad to take chlorophyll every day by detailing the key factors to consider for safe and effective use.

Quick Summary

Taking chlorophyll daily is likely safe for most people in recommended amounts, but potential mild side effects like digestive upset can occur. Supplementation should not replace a diet rich in whole foods, and consulting a doctor is advised, especially for those who are pregnant or on specific medications.

Key Points

Chlorophyllin vs. Chlorophyll: The supplement form is actually chlorophyllin, a semi-synthetic, more absorbable derivative, unlike natural chlorophyll from plants.
Generally Safe in Moderation: Daily intake of chlorophyllin is considered safe for most adults within recommended doses, typically up to 300 mg per day.
Potential Side Effects: Mild side effects can include gastrointestinal issues (nausea, diarrhea), photosensitivity, and harmless discoloration of urine or stool.
Limited Evidence for Benefits: While anecdotal reports of benefits for skin, body odor, and energy exist, strong scientific evidence is still lacking for many claims.
Not for Everyone: Pregnant or breastfeeding women, individuals on certain medications (like methotrexate), and those with specific health conditions should avoid it or consult a doctor.
Whole Foods are Preferable: The safest and most comprehensive way to get chlorophyll is from a balanced diet rich in leafy green vegetables, which also provide fiber and other nutrients.
Unregulated Supplements: The supplement industry is not strictly regulated by the FDA, so checking for third-party certifications is recommended to ensure product purity.

What is the Difference Between Chlorophyll and Chlorophyllin?

When you consume chlorophyll supplements, you are typically not ingesting the fat-soluble chlorophyll found in plants but rather chlorophyllin, a water-soluble, semi-synthetic derivative. This crucial distinction explains why supplemental versions, often containing copper and sodium, are more bioavailable than their natural counterparts found in leafy greens. Chlorophyllin is used in supplements because it is more stable and easier for the body to absorb. While natural chlorophyll from whole foods is always safe, the supplemental form, chlorophyllin, is the one associated with the reported side effects and requires cautious use.

Potential Benefits of Daily Chlorophyll Intake

For those who choose to incorporate a daily chlorophyll supplement, some potential benefits have been anecdotally reported, though more research is needed to substantiate many of these claims.

Skin Health: Some small studies suggest topical chlorophyllin gel may help improve acne and reduce signs of sun-damaged skin, and the antioxidant properties may help protect skin cells.
Antioxidant Effects: Like the green vegetables it's derived from, chlorophyll is an antioxidant that helps combat harmful free radicals, which can lead to cellular damage and inflammation.
Body Odor and Bad Breath: Older studies suggested chlorophyll could act as an internal deodorant, though scientific evidence is lacking and largely anecdotal.
Red Blood Cell Support: A 2019 clinical trial showed that a supplement containing chlorophyll and sodium iron chlorophyllin improved red blood cell counts in participants with iron deficiency anemia.

Risks and Side Effects of Taking Chlorophyll Daily

While generally safe in moderation, daily intake of chlorophyllin supplements carries some potential risks and side effects that users should be aware of.

Common Mild Side Effects:

Gastrointestinal Upset: Nausea, vomiting, diarrhea, or stomach cramps can occur, especially if taken on an empty stomach.
Discolored Stool and Urine: The potent green pigment can cause your feces and urine to turn green or, less commonly, yellow or black.
Photosensitivity: Increased sensitivity to sunlight, which can raise the risk of sunburn, is a potential side effect.

More Serious Considerations:

Pregnancy and Breastfeeding: The safety of chlorophyllin for pregnant or breastfeeding women has not been sufficiently researched, and it is generally advised to avoid supplementation during this time.
Drug Interactions: Chlorophyllin can potentially interact with certain medications. For example, it might affect the clearance of methotrexate, a drug used for cancer and autoimmune diseases. Always consult a doctor if you take medication.
Copper Overload: As a modified supplement, chlorophyllin contains copper. Excessive intake could potentially lead to copper toxicity over time.
Unregulated Supplements: As with many dietary supplements, the FDA does not regulate chlorophyllin products for safety or effectiveness before they are sold. This means inconsistent dosage and ingredients can be a risk.

Supplemental vs. Whole Food Chlorophyll

Choosing between a supplement and natural food sources is a critical decision when considering daily chlorophyll intake. While supplements offer a concentrated dose, whole foods provide a much broader spectrum of nutrients.


Feature	Supplemental Chlorophyll (Chlorophyllin)	Whole Food Chlorophyll
Source	Semi-synthetic, water-soluble form with added minerals.	Naturally occurring pigment in green plants.
Absorption	More easily absorbed by the body due to modification.	Less efficiently absorbed by the body.
Nutrients	Isolated compound, sometimes with added vitamins.	Rich in fiber, vitamins, and minerals that work synergistically.
Regulation	Not regulated by the FDA, with potential for inconsistency.	Inherently safe and regulated through food standards.
Side Effects	Potential for mild gastrointestinal issues, photosensitivity.	No known side effects, even in large quantities.
Best For	Potentially targeted benefits, though evidence is limited.	Overall health and wellness, comprehensive nutrient intake.

Recommended Dosages and Safe Practices

For adults and children over 12, the FDA has stated that consuming up to 300 mg of chlorophyllin per day is generally considered safe. However, it is always best to follow the manufacturer's directions on your specific product and start with a low dose to gauge your body's reaction. Health professionals recommend prioritizing natural sources of chlorophyll, such as leafy greens, parsley, and wheatgrass. If you do take a supplement, opting for a brand with third-party certification (like U.S. Pharmacopeia or NSF International) can help ensure product purity and dosage accuracy.

Conclusion

While taking chlorophyll every day in supplement form is generally considered safe for most adults when following recommended dosages, it is not without potential minor side effects and risks. The evidence for many of its purported health benefits remains limited and largely anecdotal. For comprehensive nutrient intake and maximum safety, obtaining chlorophyll from a diet rich in green vegetables and herbs is the superior approach. Always consult a healthcare provider before starting a daily chlorophyll supplement regimen, especially if you have underlying health conditions, are pregnant or breastfeeding, or take other medications. Listen to your body and prioritize a balanced diet for overall wellness.

Additional Tips for Safe Chlorophyll Use

Start with a low dose: Begin with a smaller amount than the recommended dose to see how your body reacts and minimize gastrointestinal distress.
Take with food: Consuming your supplement with a meal can help reduce the risk of nausea or stomach cramps.
Stay hydrated: Drinking plenty of water can help with absorption and alleviate some digestive side effects.
Protect your skin: If you experience increased photosensitivity, be sure to use sunscreen and limit sun exposure.
Monitor your body: Pay attention to any unusual changes, including persistent diarrhea, skin irritation, or other adverse effects, and consult a doctor if they occur.

Consult a Professional

Before starting any new supplement, including daily chlorophyll, it is wise to speak with a healthcare professional or registered dietitian. They can provide personalized advice based on your health history, current medications, and individual wellness goals. Their guidance will help you determine if chlorophyll is an appropriate addition to your routine and ensure it won't negatively interact with other aspects of your health.

This article is for informational purposes only and does not constitute medical advice. Consult a healthcare professional before starting any supplement.

Frequently Asked Questions

There is no scientific evidence to suggest that moderate, daily intake of chlorophyll damages healthy kidneys. However, individuals with pre-existing kidney conditions should consult their doctor before starting a chlorophyll supplement.

It is generally better to get chlorophyll from whole foods like leafy greens. Food sources provide fiber, vitamins, and minerals that work synergistically, offering more comprehensive nutritional benefits than isolated supplements.

According to the FDA, adults and children over 12 can safely take up to 300 mg of chlorophyllin per day. It is best to start with a lower dose to see how your body reacts.

Yes, increased photosensitivity is a potential side effect of taking chlorophyll supplements, which can increase your risk of sunburn. It is important to use sun protection if you take it regularly.

Common side effects include mild gastrointestinal upset (nausea, diarrhea, cramping) and harmless discoloration of stool, urine, or the tongue.

No, pregnant or breastfeeding women should avoid taking chlorophyll supplements. There is insufficient research to determine its safety for these populations, and potential risks are not fully understood.

Yes, chlorophyll can potentially interact with certain medications, such as methotrexate. Always consult your healthcare provider before starting a new supplement to check for possible drug interactions.

While often marketed as a detoxifying agent, there is little scientific evidence to support this claim. The body has its own natural detoxification processes through the liver and kidneys, and chlorophyll's role is not proven.