Food As Medicine?
With a side of human clinical trials?
Yes, please.
What if some of the remedies sitting in your kitchen have more in common with your medicine cabinet than you realize?
Long before modern pharmaceuticals, people used plants, herbs and foods medicinally—and interestingly, some modern medicines trace their origins to compounds found in nature.
Aspirin? Its story is tied to salicylates found in willow bark.
Statins? Akira Endo screened fungi and discovered compactin (mevastatin) from Penicillium citrinum. Researchers later isolated lovastatin from Aspergillus terreus.
Lovastatin? Red yeast rice naturally contains monacolin K, which is chemically identical to lovastatin.
Metformin? Its development traces back to French lilac (Galega officinalis) and the glucose-lowering compound guanidine.
Digoxin? Derived from compounds found in the foxglove plant.
Morphine? Originally isolated from the opium poppy.
Modern medicine didn't simply bottle these plants. Scientists identified active compounds, studied them, purified or modified them, determined appropriate doses, and developed standardized medications. But their natural origins are fascinating - and they raise an interesting question:
What else has been hiding in our kitchens all along?
Researchers have studied honey for coughs, ginger for nausea, turmeric/curcumin for joint pain and inflammation, oats for lowering LDL cholesterol, psyllium and kiwi for constipation, beetroot for blood pressure, and peppermint oil for IBS symptoms.
Does that mean you should replace your prescriptions with foods and herbs? No. But it does mean that “food as medicine” isn't merely an old-fashioned saying. For certain foods and specific conditions, we actually have human clinical trials to examine.
So instead of assuming something works because it's “natural” or dismissing it because it came from grandma's kitchen - let's look at the research.
Because sometimes the line between the kitchen, the garden and the pharmacy is more interesting than we think.
| Food / natural option | Comparable medication purpose | What the research shows |
|---|---|---|
| 🍯 Honey / buckwheat honey | OTC cough medicine | Human trials have found honey can reduce nighttime cough and improve sleep in children with upper-respiratory infections. Never under 12 months. |
| 🫚 Curcumin (turmeric) | NSAIDs such as ibuprofen | Multiple clinical trials/meta-analyses have found curcumin can reduce knee osteoarthritis pain and stiffness, with some trials directly comparing curcumin preparations with NSAIDs. This applies to standardized curcumin preparations—not necessarily culinary turmeric sprinkled on food. |
| 🧄 Garlic | Blood-pressure & cholesterol medications | Garlic contains sulfur compounds such as allicin. Human clinical trials and meta-analyses have found that certain garlic preparations can produce modest reductions in blood pressure and cholesterol, particularly in people with elevated levels. |
| 🫚 Ginger | Anti-nausea medications and pain relief | Ginger contains gingerols and shogaols, compounds with anti-inflammatory and anti-nausea actions. In a study of 150 women with menstrual cramps, ginger was comparable to ibuprofen and mefenamic acid for pain relief. Another randomized trial found ginger comparable to mefenamic acid for menstrual pain. Meta-analyses also show modest benefits for osteoarthritis pain, while multiple RCTs support ginger for pregnancy-related nausea. |
| 🌾 Psyllium | Bulk-forming laxatives; cholesterol-lowering treatment adjunct | Psyllium is itself an evidence-based bulk-forming laxative. Clinical research also supports LDL lowering. This is less “food vs medicine” because psyllium is actually the active ingredient in products such as Metamucil. |
| 🥝 2 green kiwis/day | Constipation treatments | Human clinical trials have found kiwi improves bowel movements in people with functional constipation/IBS-C. A trial comparing kiwi, prunes and psyllium found all three improved constipation, with kiwi producing fewer adverse GI effects. (Verywell Health) |
| 🍑 Prunes | Laxatives/psyllium | Prunes have been tested directly against psyllium. Their combination of fiber and sorbitol helps increase stool frequency and soften stool. |
| 🌿 Peppermint oil | GI antispasmodics | A 2022 meta-analysis of 10 RCTs and 1,030 people with IBS found peppermint oil superior to placebo for overall IBS symptoms and abdominal pain, although adverse effects were more common and evidence quality was rated very low. (PubMed) |
| 🥣 Oats / oat β-glucan | Cholesterol-lowering therapy adjunct | A meta-analysis of 28 RCTs found ≥3 g/day oat β-glucan lowered LDL by about 0.25 mmol/L (~9.7 mg/dL). (PubMed Central (PMC)) |
| 🌾 Ground flaxseed | Blood-pressure-lowering lifestyle therapy | A meta-analysis of 15 controlled trials involving 1,302 people found flaxseed products lowered systolic BP by about 2.9 mmHg and diastolic BP by about 2.4 mmHg overall. (PubMed) |
| 🌺 Hibiscus | Blood-pressure-lowering approaches | Randomized trials and meta-analyses suggest hibiscus tea/extract can produce modest BP reductions. Useful as a dietary strategy, but not equivalent to antihypertensive medication. |
| 🥬 Beets / dietary nitrate | BP-lowering approaches | Beetroot's nitrate to nitrite to nitric oxide pathway can increase vasodilation, and meta-analyses of RCTs have found modest reductions in blood pressure. |
| 🌿 Berberine | Blood sugar, insulin resistance, A1c, triglycerides & cholesterol | Berberine is a plant-derived compound studied extensively for metabolic health. A small randomized head-to-head trial found its glucose-lowering effect was similar to metformin over 3 months. Larger meta-analyses of RCTs also find reductions in fasting glucose, post-meal glucose and other metabolic markers, although study quality varies and this does not establish berberine as equivalent to metformin overall. (PubMed) |
| 🥣 Barley/oats | Cholesterol management |
β-glucan is the key component. A larger meta-analysis of 58 RCTs (3,974 participants) found a median 3.5 g/day oat β-glucan significantly reduced LDL, non-HDL cholesterol and ApoB. (PubMed) |