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A few drops, twice daily — a botanical layer for immunity, circulation & whole-body vitality.
A concentrated herbal tincture of Black Walnut, Olive Leaf, and Cayenne, blended exclusively for Nzymes. Traditionally used to support immunity, circulation, and digestion. 5:1 herb strength, for pets of all ages. Just a few drops per dose, so the 2 oz bottle stretches further than it looks.
Not sure how long a bottle lasts? The dose tool finds your pet's exact pace.
A delivery you control: pause, adjust, or skip anytime.
120 Day Worry-Free Guarantee
The pet aisle sells a hundred products for a hundred problems, and it's easy to end up with a shelf full of bottles and no idea if any of them are working.
We'll let the owners speak for it. Across 280+ verified reviews, three reasons come up again and again for why families keep a bottle of Black Leaf on hand.
Back the fight
already underway.
Most of the work happens on the inside.
Here's why backing the fight beats waiting it out.
Yeast overgrowth or oral growths take hold: battles only the immune system can win.
A body already compensating for modern diets has less to fight with, so progress stalls.
Weeks pass, nothing seems to change, and the body is left to carry the fight on its own.
Time-honored botanicals, black walnut, olive leaf, and cayenne, give your dog's own defenses what they need to finish the job.
We let the results speak for themselves. These are the uses that come up again and again across verified Black Leaf reviews, starting with the ones we hear about most.
A calmer coat and healthier-looking skin is why owners reach for Black Leaf most.
“I have been using this for several years and it appears to help the skin and fur of my German Shepherd.” · D. Lozada, verified review
"I wanted one daily thing to keep her system strong. Six months in, her digestion is steadier, her coat looks great, and she's got the energy of a dog half her age. I keep a bottle by the food bin now."Janelle M., Vermont · Verified buyer
Bar lengths reflect how often each use is mentioned across verified reviews, not a guaranteed result. Black Leaf is a botanical supplement that naturally supports the body; it is not intended to diagnose, treat, cure, or prevent any disease. Every pet is different and individual results may vary.
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 pet's cells for better digestion and immune balance. The botanical this formula is built around.
Long used in folk and modern herbal practice for digestive resilience and everyday balance.
The steady companion alongside walnut. Olive leaf helps protect your pet's cells from stress, supports heart and immune health, and keeps their 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 your pet feels 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 delivery methods — pick whatever fits your pet's routine. Most families settle into the "drop it in the food bowl" rhythm. The other two are there for the days that need them.
The everyday way. Squeeze the dropper directly over your pet's food, morning and evening. The tincture is bitter on its own — a small amount of food masks it completely. Wet food works best; a piece of soft kibble or a soft treat works fine too.
For pets who don't eat their food on a schedule, or when you want the dose to bypass the bowl entirely. Lift the lip on one side, release the drops along the teeth line, let your pet close their mouth. Done in under five seconds.
For larger doses, picky pets, or when you want to make the dose go down easier. Pull the drops into a needle-free oral syringe, add 3 to 4 cc of water, and slowly release along the teeth line. The water cuts the bitterness and helps the dose carry.
Slide to your pet's 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 pet's routine. If you have questions about what's right for your pet, book a consult.
A 2 oz bottle holds roughly 1,200 drops at twice-daily dosing.
Dosing chart based on the back-of-label guidance.
Black Leaf is a botanical supplement and is not intended to diagnose, cure, treat, or prevent any disease.
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 families 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 veterinarian — or book a consult with our team.
Nzymes makes three liquid supplements, and each one has its own job. Tracite Minerals replenishes the trace minerals that help everything else work harder. Black Leaf is the herbal defense, backing the fight already underway. Ox-E Drops is daily immune support, balancing the body's response from the inside. Many households use two of the three; some use all three.
Three liquids, three different jobs. Pick what your pet actually needs.
Need help deciding? Book a free 30-min consult — we'll point you to the right starting place.
The same three botanicals, made for the people in your house. Every Nzymes pet product has a human sibling, because the whole family deserves the same daily defense.
Wag more.
Worry less.™
Black Leaf is a concentrated botanical tincture that families 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 you can use for both internal wellness and topical support when your pet needs it most.
Yes. For hot spots, raw patches, 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. The number of drops depends on weight:
5–30 lbs: 2–3 drops, twice daily.
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 interactive dose tool above lets you slide to your pet's exact weight. If you have questions about what's right for your pet, book a consult with our team.
Because Black Leaf is dosed in drops and a 2 oz bottle holds roughly 1,200 drops, even larger dogs get a long supply window from a single bottle:
Small dog & cat (5–30 lb): ~10–12 months per bottle.
Medium dog (30–80 lb): ~4–5 months per bottle.
Large dog (80–150 lb): ~2–3 months per bottle.
Giant dog (150 lb+): ~1.5–2 months per bottle.
Most one-pet households end up on a 3–6 month Auto-Ship cadence. Pause, adjust, or skip anytime.
Black Leaf is formulated for animals of all ages and species. The dropper makes small doses easy — a 6-lb cat needs only 2 drops twice daily, less than a quarter of what a 30-lb dog needs. As always, book a consult if your pet has a chronic condition, is pregnant or nursing, or is taking other medications.
The tincture is bitter on its own — that's the plant compounds doing their job. A small amount of food masks it completely; we recommend wet food, a piece of soft kibble, or a soft treat. For pets who notice everything, the oral syringe method (drops + 3–4 cc water, released along the teeth line) bypasses the food bowl entirely and is over in five 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 2 months (large dogs) to every 12 months (small cat). Pause, change, or cancel anytime from your account.
Yes — Black Leaf pairs naturally with Ox-E Drops (daily immune support), Bac-Pak Plus (gut balance), and Antioxidant Treats. Each one has its own job, so they work alongside each other instead of doubling up. 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.