Daily supplement for peopleA few drops, twice daily — a botanical layer for immunity, circulation & whole-body vitality.
Three time-honored herbs in one dropper: Black Walnut, Olive Leaf, and Cayenne, in a 5:1 concentrated blend you'll only find at Nzymes. Traditional support for immunity, circulation, and digestion, for people of all ages. A few drops twice a day is all it takes, so one 2 oz bottle lasts about two months.
120 Day Worry-Free Guarantee
Most people notice changes within 2–4 weeks.
Back the fight
already underway.
Your body never stops defending itself: digestion, circulation, immune response, all working every day. Modern life gives that fight little to work with. Here is the pattern.
See what's inside →Seasons, travel, stress, processed food: the body's defenses meet something new every day, whether you notice or not.
Digestion and the immune system carry the load on their own; a modern routine sends little botanical backup their way.
Digestion that's easily thrown off, catching whatever is going around, energy that dips when the season turns.
Three botanicals back the fight already underway: walnut hull cleanses, olive leaf shields, cayenne carries them into circulation. A few drops, twice daily.
Here is what the people who take it say, in their own words. What stands out isn't how many there are. It's how long they've stayed.
Not one benefit, but how long they've stayed with it.
“Fantastic products. I've been taking them for over 10 years!” · Kathy L., verified review
"I love this product. I use it for myself and my dog. It keeps our immune system strong and healthy. Thank you Nzymes."Cynthia L. · Verified review
Verified reviews, quoted in the customers' own words and lightly trimmed. Individual experiences, not guaranteed results. Black Leaf is a botanical supplement, not a treatment for any condition, and individual results vary.
I love this product. I use it for myself and my dog. It keeps our immune system strong and healthy. Thank you Nzymes. Keep up the good work that you are doing.
Very helpful for combating fungal/yeast issues both internally and externally. I notice the benefits with helping to control my IBS.
Fantastic products. I’ve been taking them for over 10 years!
I first was introduced to this product for my dogs! Then of course I realized that this is a great product for myself!! Thank you so much.
Product reviews collected by Trustpilot after purchase, shown as written, longer ones excerpted. Newer reviews live in the verified reviews section below.
Three botanicals, three jobs: cleanse, shield, boost. The name explains what's inside.
Three botanicals, one bottle. Tap each to see its role.
The headline botanical — we use the green hulls, not the nut. Helps flush out toxins, support a healthy gut, and protect your cells for better digestion and immune balance.
Long used in folk and modern herbal practice for digestive resilience and everyday balance.
The steady companion alongside walnut. Olive leaf helps protect your cells from stress, supports heart and immune health, and keeps your body balanced and strong.
Studied for its support of microbial balance and the body's own daily defenses.
Cayenne helps boost blood flow, bringing oxygen and nutrients to cells so you feel energized and healthy. A centuries-old herbal trick — a pinch of cayenne helps the other botanicals carry into the tissues that need them.
The traditional herbal “carrier” — widens vessels so the rest of the formula reaches further.
Five parts fresh, wild-harvested herb concentrated into one part liquid — the strength you can only reach by extraction, not by mixing. Suspended in 50% organic ethanol, the traditional carrier for the bitter plant alkaloids the body responds to.
A small amount of ground cayenne fruit rides along — a centuries-old herbal trick to help the other compounds carry into circulation. That's why the dose is just a few drops. Nothing else in the bottle.
Same dose, three easy ways — pick whatever fits your routine. Most people settle into drops in a morning glass of water. The other two are there for the days that need them.
The everyday way. Add your drops to a glass of water, morning and evening, and drink. The tincture is bitter on its own — a full glass carries it easily. Rinse the dropper and you're done.
If you're sensitive to the herbal bite, a drink with a little flavor of its own masks it completely — juice, tea, or your morning coffee all work. Same drops, same schedule.
The traditional tincture way: drops in a small splash of water, down in one go, chased with a sip of plain water. Over in a few seconds — the quickest routine once you're used to it.
Take consistently, twice daily — most people notice changes within the first few weeks.
Slide to your weight — we'll show the drops twice daily and how long a 2 oz bottle lasts at that dose.
Start low. Begin at the lower end of the range and adjust gradually as it fits your routine. If you have questions about what's right for you, book a consult.
Plants don't work like pharmaceuticals — they work as a daily, low-dose input the body learns to lean on. Here's the rhythm most people notice once Black Leaf becomes part of the routine.
Black Leaf is a daily food supplement, not a treatment for any condition. For chronic or acute health concerns, always work with your healthcare provider — or book a consult with our team.
Nzymes makes three liquid supplements and they don't overlap. Tracite Minerals is the amplifying layer — trace minerals that help everything else work harder. Black Leaf is the botanical defense layer. Ox-E Drops is the pH-and-cleanliness layer — daily oxygen for the inside, on-the-spot relief for the outside. Many households use two of the three; some use all three.
Three liquids, three different jobs. Pick what you actually need.
Need help deciding? Book a free 30-min consult — we'll point you to the right starting place.
Same formula, bottled for the dogs and cats in your house. Every Nzymes people product has a pet sibling — because the daily defense layer matters at both ends of the leash.
Nzymes began with two brothers, a garage, and a dog named Biscut whose nine episodes a night had run out of answers. What turned her story around wasn't another prescription. It was live nutrition her bowl had stopped providing. That discovery became a company, and the company stayed a family.
25+ years later, we still make only a focused few products: eight for pets, a small line for people, each one aimed at the root instead of the symptom. This people's line exists for the simplest reason there is: we take it ourselves, and have for years.
And when you call with a question, you don't reach a call center. You reach one of us.
We don't mask. We don't rush. We support.
Read our storyFamily-owned and family-run since 1999.
Black Leaf is a concentrated botanical tincture that people use as a daily support layer — a small, plant-based input that supports immune function, healthy circulation, digestion, and the body's own everyday resilience. It's a routine, not a medicine.
This formula preserves the full power of each herb. The result? A versatile supplement for both internal wellness and topical support when you need it most.
Yes. For minor skin irritations and surface-level moments that need attention, mix Black Leaf 50/50 with water in a small bowl, dab onto a cotton round, and apply to the affected area twice daily as needed. Don't apply undiluted — the ethanol and capsaicin will sting on broken skin.
Twice daily, every day, in any drink. The number of drops depends on body weight, straight from the printed label:
30–80 lbs: 5–7 drops, twice daily.
80–150 lbs: 10–15 drops, twice daily.
150–250 lbs: 15–20 drops, twice daily.
The label doesn't carry a dose for children under 30 lbs; for the littlest family members, ask your healthcare provider first. The interactive dose tool above lets you slide to your exact weight. If you have questions about what's right for you, book a consult with our team.
Because Black Leaf is dosed in drops and a 2 oz bottle holds 1,800 drops (120 fifteen-drop servings), one bottle covers a long stretch:
Child, 30–80 lbs: ~5 months per bottle.
One adult (10–15 drops twice daily): ~2–2.5 months per bottle.
Couple: ~3–5 weeks per bottle.
Most households settle onto a 1–3 month Auto-Ship cadence.
Black Leaf is made for people of all ages, and the dropper makes light doses easy — the amount scales with body weight (printed-label doses start at 30 lbs; for a lighter child, ask your healthcare provider first). Note that the tincture uses a 50% organic ethanol base (the traditional carrier for plant alkaloids); a dose is only a few drops, but if you'd rather talk it through for a child, or if you're pregnant, nursing, managing a condition, or taking medications, check with your healthcare provider or book a free consult first.
There's also a pet version dosed for dogs and cats.
The tincture is bitter on its own — that's the plant compounds doing their job. A glass of water carries it easily, and a drink with a little flavor of its own (juice, tea, coffee) masks it completely. Or take it the traditional way: drops in a splash of water, down in one go, chased with plain water. Over in a few seconds.
Auto-Ship sends your order on a schedule you choose. You save 10% on every order, always — stacked on top of any quantity discount. For Black Leaf, the cadence options run from every month (a whole household) to every few months (one light-dose user). Pause, change, or cancel anytime from your account.
Yes — Black Leaf pairs naturally with Ox-E Drops (the daily immune layer) and Tracite Minerals (the mineral spark). None of them overlap. Our free 30-minute consult is built exactly for this kind of "what should I layer?" question.
Then it's on us. Every Nzymes order is backed by our 120-Day Worry-Free Guarantee — give Black Leaf an honest try, and if you're not happy for any reason within 120 days, reach out for a full refund. We'd rather earn a customer for life than hold onto a sale that didn't help.
Answer a few questions and we'll point you to the right starting place — or talk to a member of our team. No guessing, no pressure.
