hs-CRP explained
C-reactive protein is produced by the liver in response to inflammation. The "high-sensitivity" version (hs-CRP) detects low-grade chronic elevations associated with cardiovascular disease, distinct from the sky-high CRP seen in acute infections.
| hs-CRP (mg/L) | Cardiovascular risk category |
|---|---|
| <1.0 | Low (optimal) |
| 1.0-3.0 | Average |
| >3.0 | High |
| >10 | Acute inflammation, investigate underlying cause |
The Ridker JUPITER trial showed hs-CRP independently predicts cardiovascular events even in people with normal cholesterol (Ridker et al., NEJM 2008).
Homocysteine explained
Homocysteine is an amino acid produced during methionine metabolism. Adequate B-vitamins (B6, B12, folate) keep it low; deficiency causes accumulation. Elevated homocysteine damages endothelium and promotes clotting.
| Homocysteine (µmol/L) | Risk category |
|---|---|
| <8 | Optimal |
| 8-10 | Acceptable |
| 10-15 | Elevated, investigate |
| >15 | High, increased CV and cognitive risk |
Predictive power
Both markers predict events better than cholesterol in many studies. The Framingham analyses show:
- hs-CRP >3 mg/L doubles cardiovascular event risk
- Homocysteine >15 µmol/L predicts dementia, stroke, and heart attack
- Both rise years before the events they predict
Common causes of elevation
- Visceral obesity, fat tissue secretes inflammatory cytokines
- Insulin resistance, see insulin resistance reversal
- Chronic infections (gum disease, H. pylori, low-grade UTI)
- Gut dysfunction, leaky gut, dysbiosis
- Sleep deprivation
- Chronic stress / elevated cortisol
- Smoking
- Suboptimal hormones (low T, low estrogen)
- B-vitamin deficiency for homocysteine specifically
Reduction protocol
- Lose visceral fat, single biggest lever
- Resistance training + zone 2 cardio, both reduce hs-CRP
- Omega-3s 2-3 g EPA/DHA daily, directly anti-inflammatory
- B-complex with active forms, methylated folate (5-MTHF), methyl-B12, P-5-P (B6) for homocysteine
- Diet: high in vegetables, fish, olive oil; low in processed foods
- Sleep 7+ hours
- Address gum disease, periodontal inflammation contributes meaningfully to systemic CRP
- Address chronic infections if suspected
- Optimize hormones if low
The principle: Inflammation markers are downstream of multiple system inputs. Single-intervention approaches fail; stack approaches succeed.
Bottom line
hs-CRP and homocysteine are some of the most predictive, and least-ordered, labs in routine medicine. Both rise years before clinical events and respond well to lifestyle and targeted supplementation. Adding them to your standard panel turns invisible early-stage inflammation into a measurable, addressable signal.