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Top 6 liver supplements for high ALTs - Only one actually took me from 102 to 24
I spent $800 across eight months. Here is what actually lowered my ALTs from 102 to 24 into the normal range in 3 weeks.
Short on time? Out of the six I tested, only one dropped my ALT from 102 to 24 in 3 weeks. It wasn't milk thistle.
See the winner →So I stopped waiting and started testing. Over eight months I bought six liver products: two milk thistles, drainage drops, glutathione, plain NAC, and an NAC with NAD+ softgel in coconut MCT oil. Each got 30 days at label dose with a private liver panel after. Total tab, including labs: around $800.
Below are all six, ranked worst to best. The last one is the one I'm still taking.
Oxyfuel Milk Thistle
Verdict
Viral on TikTok, and the bottle says "Liver Detox & Colon Cleanse." The label says 4mg of turmeric. Six ingredients, and not one gives your liver what it needs to bring ALT down.
What works
- 300mg milk thistle at 80% silymarin, the standard strength
- Every dose printed on the label, no hidden blend
- Cheap, sold everywhere, almost always on sale
What doesn't
- 4mg of turmeric and 10mg of methionine are fairy-dust sprinkles, not therapeutic doses
- Fails to supply cysteine to replenish depleted liver glutathione
- ALT completely unchanged after 30 days: 106 → 107
It kept popping up in my feed, and six ingredients sounded like more help. I took it daily for 30 days. Bloodwork after: ALT 107. Zero change. Then I read the label: 4mg of turmeric. That's a decoration, not a dose. More ingredients didn't mean more help. It meant less of everything.
Nature's Sunshine Lymphatic Drainage
Verdict
A mechanism that sounds scientific and isn't. Your liver cells are not clogged with lymphatic fluid. They are inflamed under oxidative stress. Thirty days of drops produced zero change on my bloodwork.
What works
- Liquid drops mix into morning water in seconds
- Gentle on the stomach with a pleasant herbal taste
- A nice little morning ritual
What doesn't
- A "proprietary blend," so you never know how much of each herb you swallow
- "Drainage" does nothing to address liver cell damage or elevated ALT
- Bloodwork unchanged after a full 30-day cycle: ALT 105
My feed promised these would "flush" my liver. I took them twice a day for 30 days. Bloodwork after: ALT 105. Basically no change. Turns out high enzymes aren't a clog. Your liver cleans up using glutathione, and mine was running low. You can't drain your way out of empty.
Nature's Bounty Milk Thistle
Verdict
The pharmacy-shelf classic, and the go-to milk thistle on Amazon. One ingredient, standardized, honest label. But milk thistle doesn't give your liver what it makes glutathione from, and that's what high ALT is short on.
What works
- One clean ingredient standardized to 80% silymarin
- Trusted name sold in every pharmacy
- 200 capsules deliver a very low cost per day
What doesn't
- Milk thistle does not supply the raw cysteine cells need to make glutathione and clean the liver.
- Bloodwork unmoved after 30 days: ALT 106
- Zero hospital-grade nutrients and zero cellular repair
I figured the blend and quality was the problem, so I bought the plain one. One ingredient, big trusted brand from Amazon, one capsule a day for 30 days. Bloodwork after: ALT 106. Still high. That's when it clicked: milk thistle can't refill the glutathione my liver was running low on. A cleaner bottle of the wrong ingredient is still the wrong ingredient.
From the comments · Saved Mar 2026
"ALTs are not getting low no matter what i take. Supplements from my doctor are doing nothing. All my doctor has told me is to lose weight, I feel that is not enough. 👎"
NOW Foods Glutathione 500mg
Verdict
The right molecule, the wrong delivery. Oral glutathione gets broken down in the stomach before reaching liver tissue. You need what your cells use to build it, not the finished product.
What works
- Directly targets the liver's depleted master antioxidant (glutathione)
- I had sulfur burps and some cramps
- Famous brand on Amazon
What doesn't
- Digestion breaks down the nutrient and it doesn't reach the liver
- Fails to raise intracellular glutathione inside liver cells
- Bloodwork very slightly changed after a full 30 days: ALT 99
The logic seemed obvious: if my liver is low on glutathione, swallow glutathione. One capsule on an empty stomach for 30 days. Bloodwork after: ALT 99. Small change. The problem is the molecule, not the brand. Stomach acid breaks glutathione apart before it reaches your liver. Your liver cells must manufacture their own glutathione inside the cell to stop enzyme leakage.
NOW Foods NAC 600mg
Verdict
The proven clinical compound used in ERs for liver emergencies at the right 600mg dose. It finally moved my bloodwork a bit, but the dry powder caused intense sulfur burps and stomach cramps that made it miserable to take.
What works
- Full clinical 600mg NAC dose per capsule
- Actually lowered my ALT: 99 → 90
- Okay price and it’s on Amazon
What doesn't
- Dry powder triggers rotten-egg sulfur burps and stomach cramps
- Dry NAC powder degrades quickly on the shelf
- Still not lowering my ALTs to be in the healthy range
So I switched to NAC, the stuff ER doctors use to save livers. And it finally worked. My ALT went from 99 to 90. But the sulfur burps were brutal. Rotten eggs all morning, then cramps. I started skipping days.
The Standard Lab NAC & NAD+
Verdict
The full clinical 600 mg dose of NAC. Plus NAD+ in the same softgel. Suspended in coconut MCT oil. Dropped my ALT and AST back into normal range with zero sulfur burps and zero stomach upset.
What works
- Full 600mg dose, enough to actually bring ALT down
- MCT oil: absorbs well, no sulfur burps, no cramps
- ALT 99 → 24. Back to normal
- NAD+ helps your liver repair and brings your energy back
- Sealed softgel stays fresh down to the last pill
What doesn't
- Mild sulfur aroma when you open the bottle (proof the active NAC is intact)
- Higher price per bottle than generic drugstore powders (but it WORKS!)
This is the one I'm still taking. Day one: no burps, no stomach ache. So I actually took it every day.
By week three, the heavy feeling after meals was gone and my energy came back. At twelve weeks my doctor checked my bloodwork and asked what I'd changed. ALT 99 → 24. Back to normal.
It's simple. NAC gives your liver what it needs to repair itself. NAD+ gives it the energy to do the work. This is the only one here with both, in a softgel you can actually stomach every day.
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CHECK CURRENT PRICINGAll six, side by side
Every product, every dose, every price, every ALT result, lined up.
| Rank | Product | Dose | Format | Price | ALT result |
|---|---|---|---|---|---|
| #6 |
Oxyfuel Milk Thistle
Avoid
|
300mg milk thistle + 5 extras | Dry capsule | ~$20-40 | 106 → 107 (No change) |
| #5 |
Nature's Sunshine Lymphatic Drainage
Skip
|
300mg herbal blend | Liquid drops | ~$32-45 | 107 → 105 (No real change) |
| #4 |
Nature's Bounty Milk Thistle
Weak
|
1000mg milk thistle | Capsule | ~$25-40 | 105 → 106 (No change) |
| #3 |
NOW Foods Glutathione
Overhyped
|
500mg glutathione | Capsule | ~$34-40 | 106 → 99 (Small drop) |
| #2 |
NOW Foods NAC
Close
|
600mg NAC | Dry powder capsule | ~$34-42 | 99 → 90 (Still high) |
| #1 |
The Standard Lab NAC & NAD+
Winner
|
600mg NAC + NAD+ | MCT oil softgel | $38 | 90 → 24 (Back to normal) |
Based on the bloodwork above: only one formula delivered the full clinical NAC dose, added cellular NAD+, and used coconut MCT oil so your liver enzymes normalize without tearing up your stomach.
What the industry doesn't tell you
- 1No herb is going to fix your ALT. Milk thistle, turmeric, drainage drops: none of them is clinically proven to lower ALT. Stacking eight of them in one capsule doesn't change that. The one thing that does bring ALT down is NAC, the ingredient hospitals use to save failing livers.
- 2Dry-capsule NAC will never absorb like a softgel. Almost every NAC on the shelf is dry powder. No matter what the label promises, it won't absorb as well as NAC in MCT oil. It breaks down on the shelf, it gives you sulfur burps and cramps, and most people quit before their liver ever heals. MCT oil fixes all three.
- 3NAC worked so well, the FDA tried to pull it. In 2020 the FDA tried to stop NAC being sold as a supplement, and Amazon pulled every NAC product. People fought back, and the FDA backed down. Nobody fights that hard over an herb that does nothing.
What I wish I'd known
- 1Test your bloodwork before and after, every time. ALT and AST. If a bottle will not move your numbers on paper in 30 days, stop buying it.
- 2Ignore marketing buzzwords. "Cleanse," "flush," and "detox" are meaningless. Stressed liver cells need raw glutathione to stop leaking enzymes, not an herbal tea.
- 3Check the back label for the dose. If the amount is hidden in a "proprietary blend," assume you are being underdosed. Look for 600mg of real NAC in MCT oil, otherwise it will get destroyed in your stomach acid.
- 4Pick the one you can actually take daily. If an NAC pill gives you rotten-egg burps, you will skip days, and your liver enzymes will keep climbing. Tolerability is everything.
The one I kept · #1 of 6 tested
If you want to run the same experiment on your liver numbers
I am not a doctor. I am a 47-year-old mom who was tired of hearing "lose weight and come back in a year" while my liver enzymes crept higher. The Standard Lab offers a 30-day money-back guarantee with a less than 1% claim rate. That means you can put your own ALT and AST numbers to the test completely risk-free. If your bloodwork does not improve, you get your money back. That is the only test that matters.
SEE THE STANDARD LAB NAC & NAD+