A complete safety, timing, and dosage guide for combining Aloe Vera with St. John's Wort — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can safely take St. John's Wort and aloe vera together; there is no known clinically significant interaction between the two.
St. John's Wort and aloe vera together are safe to combine; no significant pharmacokinetic or pharmacodynamic interaction exists, though aloe latex's laxative effect can slightly alter gut transit time.
St. John's Wort potently induces cytochrome P450 enzymes such as CYP3A4 and P-glycoprotein, which accelerates the metabolism of many drugs. Aloe vera, however, contains anthraquinones like aloin that act topically on the colon to stimulate peristalsis and are not significantly metabolized by these enzymes. Thus, they do not compete for the same metabolic pathways. The only plausible interaction is that aloe latex-induced diarrhea can shorten intestinal transit time, potentially reducing absorption of oral supplements taken at the same moment. This effect is not specific and can be avoided by spacing doses.
Since no clinically relevant interaction exists, you can take both as part of your daily routine. Take St. John's Wort in the morning with breakfast to minimize photosensitivity awareness and to avoid possible sleep disturbance. If you use an aloe latex product for constipation, take it at bedtime to produce a morning bowel movement, and space it at least 2 hours from any other oral supplements. When using aloe vera gel, you can take it alongside St. John's Wort with no timing restrictions. Always choose brands from reputable manufacturers that specify whether the product is latex-free or standardized.
Aloe vera gel (from the inner leaf) contains mostly polysaccharides and is generally mild, while aloe vera latex (from the leaf skin) is a powerful stimulant laxative. St. John's Wort is typically taken as a standardized extract with a fixed hypericin and hyperforin content. If you choose a latex-containing aloe product, avoid prolonged use to prevent electrolyte imbalance. The gel form has no known laxative effect and will not affect St. John's Wort absorption.
Yes, you can take them at the same time; there is no known interaction. However, if you're using aloe latex as a laxative, I suggest spacing it from other supplements by a couple of hours to avoid any impact from faster gut transit.
It is safe to combine them daily if you are using aloe vera gel. For aloe latex, I would not recommend daily use because it can cause electrolyte imbalance and dependence; save it for occasional constipation.
No waiting period is required for aloe vera gel. If you take aloe latex, I recommend waiting at least 2 hours after taking St. John's Wort to ensure proper nutrient absorption.
No, they do not compete for absorption pathways. St. John's Wort is absorbed in the small intestine and metabolized by the liver, while aloe vera's anthraquinones act in the colon. The only concern is that aloe latex can speed up bowel movements, which is why we space it apart.
People on prescription medications should avoid St. John's Wort altogether due to its strong enzyme induction. Pregnant women, individuals with kidney disease, or those prone to electrolyte imbalances should also avoid aloe latex. The aloe gel is generally safer, but always check with your doctor if you have a medical condition.
I recommend taking St. John's Wort with food to reduce stomach upset. Aloe vera gel can be taken on an empty stomach for soothing benefits, while aloe latex is usually taken at bedtime on an empty stomach. Both can be adjusted to your tolerance.
Reviewed by Caroline M. on April 8, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.